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Page namespace (page_namespace) | 0 |
Page title without namespace (page_title) | 'Toyota R engine' |
Full page title (page_prefixedtitle) | 'Toyota R engine' |
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Old page wikitext, before the edit (old_wikitext) | 'The '''[[Toyota]] R family''' was a series of [[straight-4]] engines produced from 1953 through 1995. It was designed for [[longitudinal]] use in such vehicles as the [[Toyota Celica|Celica]] and [[Toyota Cressida|Cressida]]. [[OHC]] versions featured a chain-driven [[camshaft]].
==History of the R family==
===R===
The 1.5 L (1453 cc) '''R''' family was produced from 1953 through 1964.
Bore was 77 mm (3.03 in) and stroke was 78 mm (3.07 in).<ref name="RT20parts">Corona 1500 Parts Catalog, No.53282-67</ref> In common with new engines of the time, it was made from cast iron (both the block and the head), water cooled, used a three bearing crank, 12V electrics and a side mounted gear-driven camshaft controlling [[overhead valve]]s via pushrods in a [[Reverse-flow cylinder head|non-cross flow]] head (exhaust and inlet manifolds being on the same side of the engine).<ref name="RT20parts"/> Induction was by a twin throat down-draft carburettor, the compression ratio was 8.0:1 and the total weight was 155 kg.<ref name="RT20parts"/> An [[Autogas|LPG]] version, the '''R-LPG''', was produced for the last two years.
The R engine was the Toyota engine used in the 1958 [[Toyota Crown]], the first model to be exported to the United States. ''[[Road & Track]]'' was unimpressed with the engine on its introduction, noting that it idled quietly but was "not capable of very high revolutions per minute."
{| class="wikitable"
|-
! Code
! Power kW (HP)
! Torque N·m (ft·lbf)
! Years
! Comments
|-
| R
| 45 (60) at 4400 rpm
| 108 (79.5) & 2600 rpm
| 1953–1964
|
|-
| R-LPG
|
|
| 1962–1964
| LPG
|}
Applications:
* 1953-1955 [[Toyota Super]]
* 1955-1956 [[Toyota Master]]
* 1955-1958 [[Toyota Crown]]
===2R===
The 1.5 L (1490 cc) '''2R''' family was produced from 1964 through 1969.
Again, an [[Autogas|LPG]] version, the '''2R-LPG''', was produced alongside the gasoline version all five years.
{| class="wikitable"
|-
! Code
! Power kW (HP)
! Torque N·m (ft·lbf)
! Years
! Comments
|-
| 2R
| 55 (74) at 5000 rpm
| 116 (85) at 2600 rpm
| 1964–1969
|
|-
| 2R-LPG
|
|
| 1964–1969
| LPG
|}
===3R===
[[Image:Toyota 3r-c.JPG|thumb|Toyota 3R-C]]
The 1.9 L (1897 cc) '''3R''' family was produced from 1959 through 1968.
When introduced it had a 7.7:1 compression ratio. In 1960 the 3R was uprated to 8:1 and the '''3R-B''' version was offered from 1960 through 1968 with the old 7.7:1 compression ratio. The '''3R-C''' was introduced to comply with Californian emissions laws. The '''3R-LPG''' variant was made for the last five years.
{| class="wikitable"
|-
! Code
! Power kW (HP)
! Torque N·m (ft·lbf)
! Years
! Comments
|-
| 3R
| 60 (80) at 4600 rpm
| 142 (105) at 2600 rpm
| 1959–1960
| 7.7 CR
|-
| 3R
| 67 (90) at 5000 rpm
| 142 (105) at 3400 rpm
| 1960–1968
| 8.0 CR
|-
| 3R-B
| 60 (80) at 4600 rpm
| 142 (105) at 2600 rpm
| 1960–1968
| 7.7 CR
|-
| 3R-C
|
|
|
| emissions control - California
|-
| 3R-LPG
|
|
| 1963–1968
| LPG
|}
Applications:
* 1964–1967 [[Toyota Stout]], 85 hp (63 kW)
* 1969–? [[Toyota Hilux]]
* 1967–1969 [[Toyota Corona]] (US)
* 1959–1967 [[Toyota Crown]]
* 1959–? [[Toyota Masterline]]
===4R===
The 1.6 L (1587 cc) '''4R''' family was produced from 1965 through 1968.
Bore was 78 mm.
Applications:
* 1967 [[Toyota Corona]] (Japan)
===5R===
The 2.0 L (1994 cc) '''5R''' family was produced from 1968 through 1986.<br />
An [[Autogas|LPG]] version, the '''5R-LPG''', was produced from 1968 through 1983.
It was a 2-valve [[Overhead valve|OHV]] engine. Cylinder bore was 88 mm (3.46 in) and stroke was 82 mm (3.23 in). <br />
Output was 106 hp (79 kW) at 5200 rpm and 125 ft·lbf (169 N·m) at 3000 rpm.
===6R===
The 1.7 L (1707 cc) '''6R''' was produced from 1969 through 1974.<br />
Output was 107hp at 5300 rpm
The '''6R-B''' was produced those same years.<br />
The '''6R-LPG''' was produced from 1970 through 1973.
===7R===
The 1.6 L (1591 cc) '''7R''' was produced from 1968 through 1971 with a twin throat down-draft carburettor.<ref name="RT41parts">Toyota Corona Deluxe, Parts Catalog, No.53212-68</ref><br />
The '''7R-B''' was produced from 1968 through 1969 with dual [[SU carburetor|SU carburettors]] and higher compression.<br />
The '''7R-LPG''' was produced from 1969 through 1970.
The 7R was similar in displacement and technology to the 4R except the wider 86 mm bore and shorter 68.5 mm stroke of the 7R gave different power characteristics.
{| class="wikitable"
|-
! Code
! Power kW (HP)
! Torque N·m (ft·lbf)
! Compression
! Years
! Comments
|-
| 7R<ref name="RT41parts"/>
| 63 (85) at 5500 rpm
| 123 (90) at 3800 rpm
| 8.5
| 1968–1971
|
|-
| 7R-B<ref name="RT41parts"/>
| 75 (100) at 6200 rpm
| 133 (98) at 4200 rpm
| 9.5
| 1968–1969
| Dual SU carburettors
|-
| 7R-LPG
|
|
|
| 1969–1971
| LPG
|}
Applications:
* 1968-1969 [[Toyota Corona]] (RT41 sedan, RT53 hardtop, RT54 hardtop)
* 1970 [[Toyota Corona]] (RT82 sedan)
===8R===
The 1.9 L (1858 cc) '''8R''' The engine was produced from 1968 through 1973. <br />
Cylinder bore was 85.9 mm (3.38 in) and stroke was 80 mm (3.15 in) with a five bearing crank.<br />
It was also available as the '''8R-D''', dual SU '''8R-B''', [[EFI]] '''8R-E''', Californian-spec '''8R-C''' and [[DOHC]] '''8R-G'''.
It was a major departure for the R family. With a 2-valve [[SOHC]] head, it impressed contemporary reviewers - ''[[Road & Track]]'' praised its quietness and free-revving nature.
The Toyota upped the ante again with the [[DOHC]] (but still 2-valve) '''8R-G''', produced from 1969 through 1972. From 1969 to Feb 1971 it was known as the '''10R'''.
{| class="wikitable"
|-
! Code
! Power kW (HP)
! Torque N·m (ft·lbf)
! Compression
! Years
! Comments
|-
| 8R
| 81 (108) at 5500 rpm
| 153 (113) at 3800 rpm
| 9.0
| 1968–1972
|
|-
| 8R-B
| 82 (110) at 6000 rpm
| 152 (112) at 4000 rpm
| 10.0
| 1969–1971
| Dual [[SU carburetor|SU carburettors]]
|-
| 8R-D
|
|
|
|
|
|-
| 8R-E
|
|
|
|
| EFI
|-
| 8R-C
| 81 (108) at5500 rpm
| 174 (128) at 3600 rpm
| 9.0
|
| Californian emissions controls
|-
| 8R-G
| 104 (140) at 6400 rpm
| 166 (123) at 5200 rpm
|
| 1969–1972
| DOHC, dual side-draft carburettors
|}
Applications:
* 1970–1971 [[Toyota Hilux]], 97 HP (72 kW)
* 1971–1973 [[Toyota Corona]] 1900 hardtop
* [[Toyota Corona Mark II]] RT72 Corona Mark II 1900 hardtop
* [[Toyota Corona Mark II]] RT72 Corona Mark II 1900 hardtop GSS (8R-G)
===9R===
The 1.6 L (1587 cc) '''9R''' was produced from 1967 through 1968.
It was essentially a 4R with a [[DOHC]] head designed by Yamaha. The cam lobes activated the valves directly via a bucket over shim arrangement. This same arrangement was used on the 2M, 8R-G, 10R, 18R-G, 2T-G, 4A-GE and 3T-GTE engines (all designed by Yamaha).
Output was 110 hp (82 kW) at 6200 rpm and 101 ft·lbf (136 N·m) at 5000 rpm. It was a 2-valve [[DOHC]] design.
Applications:
* [[Toyota Corona]] RT55 Corona 1600 GT hardtop
===10R===
The 1.9 L (1858 cc) '''10R''' was produced from 1967 through Feb 1971.
In Feb 1971 it was renamed the 8R-G.
Output was 140 hp (104 kW) at 6400 rpm and 123 ft·lbf (166 N·m) at 5200 rpm.
Applications:
* [[Toyota Corona Mark II]] RT75 Corona Mark II GSS
===12R===
The 1.6 L (1587 cc) '''12R''' was produced from 1969 through 1988.<br />
Technical Specs (Finnish Owner's Manual from 1973 Corona Mark 1)<br />
- Four cylinder, 4-stroke, OHV <br />
- Bore & stroke: 80,5*78,0mm <br />
- Compression ratio: 8,5:1 <br />
- Maximum power: 90hp/5400rpm SAE
The '''12R-LPG''', was produced from 1969 through 1983.<br />
Technical Specs : 1975 59KW 80HP redline 4400Rpm
Applications:
* 1977 [[Toyota Corona]]
* 1977 [[Toyota Hiace]]
* 1975 [[Toyota Hiace Commercial Camper]]
* 1977 [[Daihatsu F20]]
=== 16R ===
The 1.8 L (1808 cc) '''16R''' was produced from 1974 through 1980.<br />
The '''16R-B''' was produced for the first two years.
== 16R ==
105 hp at 5600 rpm / 15kgm at 3800 rpm
'''== 16R-B =='''
110 hp at 6000 rpm / 15.3 kgm at 4000 rpm
=== 18R ===
The '''18R''' series shared a 2.0 L (1968 cc) block; cylinder bore was 88.5 mm (3.48 in) and stroke was 80 mm (3.15 in).
The 2 valve, SOHC versions were as follows:
{| class="wikitable"
|-
! Code
! Power HP
! Torque N·m (ft·lbf)
! Years
! Comments
|-
| 18R
| 119 at 5500 rpm
| 142–145 (105–107)
| 1971–1981
|-
| 18R-C
| 97 at 5500 rpm
| 143–145 (106–107) at 3600 rpm
| 1971–1981
| emissions control - worldwide
|-
| 18R-U
| 100 at 5500 rpm
| 152 (112) at 3600
| 1975–1978
| emissions control - Japan
|-
| 18R-E
| 130 at 5600 rpm
| 172 (127) at 4400 rpm
| 1974–1975
| EFI, Japan only
|}
Applications:
* 18R/18R-C/18R-U/18R-E
** 1972 [[Toyota Corona]] ''2000''
** 1972 [[Toyota Corona]] ''2000 MK. II''
** 1972 [[Toyota Celica]] ''2000''
** 197X [[Toyota Cressida]] ''2000''/''Gen1''
* 18R-C
** 1972-1974 [[Toyota Hilux]], 108 hp (80.5 kW)
** 1974-1981 [[Toyota Celica]] ''2000''
==== 18R-G ====
The 2-valve [[DOHC]] '''18R-G''' and its variations were produced from 1973 to 1982. While most 18R-Gs had a head designed and made by [[Yamaha Motor Company|Yamaha]], a very few had Toyota heads.{{Fact|date=June 2009}} Yamaha's tuning-fork logo can be seen on the Yamaha heads. Except for the head and related timing components, most parts were shared or interchangeable with the SOHC 18R.
In 1973, air injection was added to the Japan-market '''18R-GR''' for improved emissions. A [[fuel injected]] Japan-market version, the '''18R-GEU''', was produced from 1978 through 1982.
Competition versions of the 18R-G and -GE include those used in rally Celicas of the period. Some of these engines had 4-valve heads and developed up to 240 HP (180 kW) of power.{{Fact|date=June 2009}}
{| class="wikitable"
|-
! Code
! Power kW (HP)
! Torque N·m (ft·lbf)
! Years
! Comments
|-
| 18R-G
| 82–108 (110–145) at 6400 rpm
| 177 (131) at 5200 rpm
| 1973–1981
|
|-
| 18R-GR
| 104 (140) at 6400 rpm
| 169 (124) at 4800 rpm
| 1973–1975
| low compression for regular fuel
|-
| 18R-GU
| 97 (130) at 6000 rpm
| 162 (119) at 4800 rpm
| 1975–1978
| emissions control - Japan.
|-
| 18R-GEU
| 101 (135) at 5800 rpm
| 172 (127) at 4400 rpm
| 1978–1982
| EFI, emissions control (Japan).
|}
Applications:
* 1973-1981 [[Toyota Celica]] GT 2000
* 1982-1983 [[Toyota Celica]] GT 2000 (RA63)
* 1974-1983 [[Toyota Carina]] GT 2000
* 1978-1983 [[Toyota Camry|Toyota Celica Camry]] GT 2000
* 1973-1982 [[Toyota Corona]] GT 2000
===19R===
The 2-valve [[SOHC]] 2.0 L (1968 cc) '''19R''' was produced from 1974 through 1977.<br /> Cylinder bore was 88.5 mm {{convert|88.5|mm|1|abbr=on}} and stroke was 80 mm {{convert|80.0|mm|1|abbr=on}}. The crank was shared with the 18R.
Applications:
* 1974-1977 [[Toyota Corona|Corona RT103]], Japan
===20R===
The 2-valve [[SOHC]] 2.2 L (2189 cc) '''20R''' was produced from 1975 through 1980.<br />
Cylinder bore was 88.4 mm (3.48 in) and stroke was 88.9 mm (3.5 in). Aluminum alloy heads were used.
Initial output was 96 hp (72 kW) at 4800 rpm (90 hp in [[California]]) and 120 ft·lbf (162 N·m) at 2800 rpm. Power was down slightly from 1978 through 1979 at 95 hp (71 kW) at 4800 rpm and 122 ft·lbf (165 N·m) at 2400 rpm. The final version, from 1979 through 1980, was down again at 90 hp (67 kW) at 4800 rpm (95 HP Canada) and 122 ft·lbf (165 N·m) at 2400 rpm.
Applications:
* 1975-1980 [[Toyota Hilux]]
* 1975-1980 [[Toyota Celica]] U.S. Version
* 1975-1980 [[Toyota Corona]] U.S. Version
===21R===
The 2-valve [[SOHC]] 2.0 L (1972 cc) '''21R''' was produced from 1978 through 1987.<br /> Cylinder bore was 84 mm (3.31 in) and stroke was 89 mm (3.5 in).
Output in 1978, constrained by emissions, was 105 hp (78 kW) at 5200 rpm and 116 ft·lbf (157 N·m) at 3600 rpm. Air injection and [[California]] emissions equipment for the '''21R-C''' (1982-1985) dropped power down to 90 hp (67 kW) at 5000 rpm. The air-injected Japanese version, the '''21R-U''', produced 105 hp (78 kW) at 5200 rpm and 120 ft·lbf (162 N·m) at 3600 rpm but dropped to 101 hp (75 kW) at 5400 rpm and 114 ft·lbf (154 N·m) at 4000 rpm in 1986.
===22R===<!-- This section is linked from [[Toyota Celica]] -->
The 2-valve [[SOHC]] 2.4 L (2366 cc) '''22R''' was produced from 1981 through 1995. <br />
Cylinder bore was 91.9 mm (3.62 in) and stroke was 88.9 mm (3.5 in).
Initial output was 97 hp (72 kW) at 4800 rpm and 129 ft·lbf (174 N·m) at 2800 rpm. <br />
By 1990 the 22R was producing 108 hp (81 kW) at 5000 rpm and 138 ft·lbf (187 N·m) at 3400 rpm.
The first [[fuel injected]] '''22R-E''' engines appeared in 1983. <br />
Output of these engines is commonly rated at 105 hp (78 kW) at 4800 rpm and 137 ft·lbf (185 N·m) at 2800 rpm.
In 1985, the engine was significantly reworked, output was up to 112 hp (84 kW) at 4600 rpm and 142 ft·lbf (192 N·m) at 3400 rpm. Many parts from the newer '''22R-E''' are not compatible with those from the older pre-1985 engine. Non-compatible parts include the cylinder head, block, pistons and many of the associated parts such as the timing chain and cover, and water and oil pumps (although the oil pump internals are the same).
Toyota swapped the dual row timing chain used in older engines for a single row chain with plastic guides in 1983. This system reduced drag on the engine, but was inherently problematic. Every 80,000 to 140,000 miles, the chain stretches to the point that the hydraulic-operated chain tensioner can not take up any more slack. When this happens, the timing chain impacts driver's side chain guide, breaking the plastic within a few hundred miles of driving. If the engine continues to be operated after the guide breaks, the chain will stretch rapidly (an unfortunate characteristic of single row chains.) The loose chain causes inaccurate ignition timing which usually results in noticeable rough running. In continued operation the chain can jump a tooth on the drive sprocket or break entirely, with either case resulting in engine damage from valve-piston collisions.
The [[turbocharged]] '''22R-TE''' (sold from late 1985 through 1988) produced 135 hp (101 kW) at 4800 rpm and 173 ft·lbf (234 N·m) at 2800 rpm.
However, its weakness is high-end power. Thus, most ''performance'' enthusiasts usually prefer the Toyota [[Toyota_R_engine#18R-G|18R-G]], [[Toyota_T_engine#2T-G.28R.2FU.2FEU.29|2T-G]], [[4A-GE]] and [[Toyota 3S-GE|3S-GE]] 4-cylinder engines, The '''22R''' has a bigger displacement and a strong block, but its comparatively long stroke limits its use in high revving applications.
The engines are extremely well known for their durability, high fuel efficiency and good low to mid range torque.
{| class="wikitable"
|-
! Code
! Power kW (HP)
! Torque N·m (ft·lbf)
! Years
! Comments
|-
| 22R
| 72 (97) at 4800 rpm
| 174 (129) & 2800 rpm
| 1981–1990
| carb, dual row timing chain ('81-'82)
carb, single row timing chain ('83-'90)
|
|-
| 22R
| 81 (108) at 5000 rpm
| 187 (138) & 3400 rpm
| 1990–1995
|
|-
| 22R-E
| 78 (105) at 4800 rpm
| 185 (137) & 2800 rpm
| 1983–1984
| EFI, single row timing chain
|-
| 22R-E
| 84 (112) at 4600 rpm
| 192 (142) & 3400 rpm
| 1985–1995
| EFI, single row timing chain
|-
| 22R-TE
| 101 (135) at 4800 rpm
| 234 (173) & 2800 rpm
| 1986–1988
| turbocharged, single row timing chain
|}
Applications:
* 22R
** 1981 [[Toyota Corona]]
** 1981-1988 [[Toyota Hilux]]
** 1981-1984 [[Toyota Celica]]
** 1981-1995 [[Toyota Pickup]]
** 1984 [[Toyota 4Runner]]
* 22R-E
** 1985-1995 [[Toyota Hilux]]
** 1983-1985 [[Toyota Celica]]
** 1985-1995 [[Toyota Pickup]]
** 1985-1995 [[Toyota 4Runner]]
* 22R-TE
** late 1985-1988 [[Toyota Hilux]], 135 hp (101 kW)
** 1987 [[Toyota 4Runner]]
==References==
{{reflist}}
==See also==
* [[List of Toyota engines]]
* [http://www.toysport.com/Technical%20Information/22r_tech_notes.htm 22R Tech Notes] (Toysport)
* [http://www.toyoland.com/engines/20R.html Toyota 20R engines: details and photos] (Toyoland)
[[Category:Toyota engines|R]]
[[ja:トヨタ・R型エンジン]]' |
New page wikitext, after the edit (new_wikitext) | 'The '''[[Toyota]] R family''' was a series of [[straight-4]] engines produced from 1953 through 1995. It was designed for [[longitudinal]] use in such vehicles as the [[Toyota Celica|Celica]] and [[Toyota Cressida|Cressida]]. [[OHC]] versions featured a chain-driven [[camshaft]].
==History of the R family==
===R===
The 1.5 L (1453 cc) '''R''' family was produced from 1953 through 1964.
Bore was 77 mm (3.03 in) and stroke was 78 mm (3.07 in).<ref name="RT20parts">Corona 1500 Parts Catalog, No.53282-67</ref> In common with new engines of the time, it was made from cast iron (both the block and the head), water cooled, used a three bearing crank, 12V electrics and a side mounted gear-driven camshaft controlling [[overhead valve]]s via pushrods in a [[Reverse-flow cylinder head|non-cross flow]] head (exhaust and inlet manifolds being on the same side of the engine).<ref name="RT20parts"/> Induction was by a twin throat down-draft carburettor, the compression ratio was 8.0:1 and the total weight was 155 kg.<ref name="RT20parts"/> An [[Autogas|LPG]] version, the '''R-LPG''', was produced for the last two years.
The R engine was the Toyota engine used in the 1958 [[Toyota Crown]], the first model to be exported to the United States. ''[[Road & Track]]'' was unimpressed with the engine on its introduction, noting that it idled quietly but was "not capable of very high revolutions per minute."
{| class="wikitable"
|-
! Code
! Power kW (HP)
! Torque N·m (ft·lbf)
! Years
! Comments
|-
| R
| 45 (60) at 4400 rpm
| 108 (79.5) & 2600 rpm
| 1953–1964
|
|-
| R-LPG
|
|
| 1962–1964
| LPG
|}
Applications:
* 1953-1955 [[Toyota Super]]
* 1955-1956 [[Toyota Master]]
* 1955-1958 [[Toyota Crown]]
===2R===
The 1.5 L (1490 cc) '''2R''' family was produced from 1964 through 1969.
Again, an [[Autogas|LPG]] version, the '''2R-LPG''', was produced alongside the gasoline version all five years.
{| class="wikitable"
|-
! Code
! Power kW (HP)
! Torque N·m (ft·lbf)
! Years
! Comments
|-
| 2R
| 55 (74) at 5000 rpm
| 116 (85) at 2600 rpm
| 1964–1969
|
|-
| 2R-LPG
|
|
| 1964–1969
| LPG
|}
===3R===
[[Image:Toyota 3r-c.JPG|thumb|Toyota 3R-C]]
The 1.9 L (1897 cc) '''3R''' family was produced from 1959 through 1968.
When introduced it had a 7.7:1 compression ratio. In 1960 the 3R was uprated to 8:1 and the '''3R-B''' version was offered from 1960 through 1968 with the old 7.7:1 compression ratio. The '''3R-C''' was introduced to comply with Californian emissions laws. The '''3R-LPG''' variant was made for the last five years.
{| class="wikitable"
|-
! Code
! Power kW (HP)
! Torque N·m (ft·lbf)
! Years
! Comments
|-
| 3R
| 60 (80) at 4600 rpm
| 142 (105) at 2600 rpm
| 1959–1960
| 7.7 CR
|-
| 3R
| 67 (90) at 5000 rpm
| 142 (105) at 3400 rpm
| 1960–1968
| 8.0 CR
|-
| 3R-B
| 60 (80) at 4600 rpm
| 142 (105) at 2600 rpm
| 1960–1968
| 7.7 CR
|-
| 3R-C
|
|
|
| emissions control - California
|-
| 3R-LPG
|
|
| 1963–1968
| LPG
|}
Applications:
* 1964–1967 [[Toyota Stout]], 85 hp (63 kW)
* 1969–? [[Toyota Hilux]]
* 1967–1969 [[Toyota Corona]] (US)
* 1959–1967 [[Toyota Crown]]
* 1959–? [[Toyota Masterline]]
===4R===
The 1.6 L (1587 cc) '''4R''' family was produced from 1965 through 1968.
Bore was 78 mm.
Applications:
* 1967 [[Toyota Corona]] (Japan)
===5R===
The 2.0 L (1994 cc) '''5R''' family was produced from 1968 through 1986.<br />
An [[Autogas|LPG]] version, the '''5R-LPG''', was produced from 1968 through 1983.
It was a 2-valve [[Overhead valve|OHV]] engine. Cylinder bore was 88 mm (3.46 in) and stroke was 82 mm (3.23 in). <br />
Output was 106 hp (79 kW) at 5200 rpm and 125 ft·lbf (169 N·m) at 3000 rpm.
===6R===
The 1.7 L (1707 cc) '''6R''' was produced from 1969 through 1974.<br />
Output was 107hp at 5300 rpm
The '''6R-B''' was produced those same years.<br />
The '''6R-LPG''' was produced from 1970 through 1973.
===7R===
The 1.6 L (1591 cc) '''7R''' was produced from 1968 through 1971 with a twin throat down-draft carburettor.<ref name="RT41parts">Toyota Corona Deluxe, Parts Catalog, No.53212-68</ref><br />
The '''7R-B''' was produced from 1968 through 1969 with dual [[SU carburetor|SU carburettors]] and higher compression.<br />
The '''7R-LPG''' was produced from 1969 through 1970.
The 7R was similar in displacement and technology to the 4R except the wider 86 mm bore and shorter 68.5 mm stroke of the 7R gave different power characteristics.
{| class="wikitable"
|-
! Code
! Power kW (HP)
! Torque N·m (ft·lbf)
! Compression
! Years
! Comments
|-
| 7R<ref name="RT41parts"/>
| 63 (85) at 5500 rpm
| 123 (90) at 3800 rpm
| 8.5
| 1968–1971
|
|-
| 7R-B<ref name="RT41parts"/>
| 75 (100) at 6200 rpm
| 133 (98) at 4200 rpm
| 9.5
| 1968–1969
| Dual SU carburettors
|-
| 7R-LPG
|
|
|
| 1969–1971
| LPG
|}
Applications:
* 1968-1969 [[Toyota Corona]] (RT41 sedan, RT53 hardtop, RT54 hardtop)
* 1970 [[Toyota Corona]] (RT82 sedan)
===8R===
The 1.9 L (1858 cc) '''8R''' The engine was produced from 1968 through 1973. <br />
Cylinder bore was 85.9 mm (3.38 in) and stroke was 80 mm (3.15 in) with a five bearing crank.<br />
It was also available as the '''8R-D''', dual SU '''8R-B''', [[EFI]] '''8R-E''', Californian-spec '''8R-C''' and [[DOHC]] '''8R-G'''.
It was a major departure for the R family. With a 2-valve [[SOHC]] head, it impressed contemporary reviewers - ''[[Road & Track]]'' praised its quietness and free-revving nature.
The Toyota upped the ante again with the [[DOHC]] (but still 2-valve) '''8R-G''', produced from 1969 through 1972. From 1969 to Feb 1971 it was known as the '''10R'''.
{| class="wikitable"
|-
! Code
! Power kW (HP)
! Torque N·m (ft·lbf)
! Compression
! Years
! Comments
|-
| 8R
| 81 (108) at 5500 rpm
| 153 (113) at 3800 rpm
| 9.0
| 1968–1972
|
|-
| 8R-B
| 82 (110) at 6000 rpm
| 152 (112) at 4000 rpm
| 10.0
| 1969–1971
| Dual [[SU carburetor|SU carburettors]]
|-
| 8R-D
|
|
|
|
|
|-
| 8R-E
|
|
|
|
| EFI
|-
| 8R-C
| 81 (108) at5500 rpm
| 174 (128) at 3600 rpm
| 9.0
|
| Californian emissions controls
|-
| 8R-G
| 104 (140) at 6400 rpm
| 166 (123) at 5200 rpm
|
| 1969–1972
| DOHC, dual side-draft carburettors
|}
Applications:
* 1970–1971 [[Toyota Hilux]], 97 HP (72 kW)
* 1971–1973 [[Toyota Corona]] 1900 hardtop
* [[Toyota Corona Mark II]] RT72 Corona Mark II 1900 hardtop
* [[Toyota Corona Mark II]] RT72 Corona Mark II 1900 hardtop GSS (8R-G)
===9R===
The 1.6 L (1587 cc) '''9R''' was produced from 1967 through 1968.
It was essentially a 4R with a [[DOHC]] head designed by Yamaha. The cam lobes activated the valves directly via a bucket over shim arrangement. This same arrangement was used on the 2M, 8R-G, 10R, 18R-G, 2T-G, 4A-GE and 3T-GTE engines (all designed by Yamaha).
Output was 110 hp (82 kW) at 6200 rpm and 101 ft·lbf (136 N·m) at 5000 rpm. It was a 2-valve [[DOHC]] design.
Applications:
* [[Toyota Corona]] RT55 Corona 1600 GT hardtop
===10R===
The 1.9 L (1858 cc) '''10R''' was produced from 1967 through Feb 1971.
In Feb 1971 it was renamed the 8R-G.
Output was 140 hp (104 kW) at 6400 rpm and 123 ft·lbf (166 N·m) at 5200 rpm.
Applications:
* [[Toyota Corona Mark II]] RT75 Corona Mark II GSS
===12R===
The 1.6 L (1587 cc) '''12R''' was produced from 1969 through 1988.<br />
Technical Specs (Finnish Owner's Manual from 1973 Corona Mark 1)<br />
- Four cylinder, 4-stroke, OHV <br />
- Bore & stroke: 80,5*78,0mm <br />
- Compression ratio: 8,5:1 <br />
- Maximum power: 90hp/5400rpm SAE
The '''12R-LPG''', was produced from 1969 through 1983.<br />
Technical Specs : 1975 59KW 80HP redline 4400Rpm
Applications:
* 1977 [[Toyota Corona]]
* 1977 [[Toyota Hiace]]
* 1975 [[Toyota Hiace Commercial Camper]]
* 1977 [[Daihatsu F20]]
=== 16R ===
The 1.8 L (1808 cc) '''16R''' was produced from 1974 through 1980.<br />
The '''16R-B''' was produced for the first two years.
=== 18R ===
The '''18R''' series shared a 2.0 L (1968 cc) block; cylinder bore was 88.5 mm (3.48 in) and stroke was 80 mm (3.15 in).
The 2 valve, SOHC versions were as follows:
{| class="wikitable"
|-
! Code
! Power HP
! Torque N·m (ft·lbf)
! Years
! Comments
|-
| 18R
| 119 at 5500 rpm
| 142–145 (105–107)
| 1971–1981
|-
| 18R-C
| 97 at 5500 rpm
| 143–145 (106–107) at 3600 rpm
| 1971–1981
| emissions control - worldwide
|-
| 18R-U
| 100 at 5500 rpm
| 152 (112) at 3600
| 1975–1978
| emissions control - Japan
|-
| 18R-E
| 130 at 5600 rpm
| 172 (127) at 4400 rpm
| 1974–1975
| EFI, Japan only
|}
Applications:
* 18R/18R-C/18R-U/18R-E
** 1972 [[Toyota Corona]] ''2000''
** 1972 [[Toyota Corona]] ''2000 MK. II''
** 1972 [[Toyota Celica]] ''2000''
** 197X [[Toyota Cressida]] ''2000''/''Gen1''
* 18R-C
** 1972-1974 [[Toyota Hilux]], 108 hp (80.5 kW)
** 1974-1981 [[Toyota Celica]] ''2000''
==== 18R-G ====
The 2-valve [[DOHC]] '''18R-G''' and its variations were produced from 1973 to 1982. While most 18R-Gs had a head designed and made by [[Yamaha Motor Company|Yamaha]], a very few had Toyota heads.{{Fact|date=June 2009}} Yamaha's tuning-fork logo can be seen on the Yamaha heads. Except for the head and related timing components, most parts were shared or interchangeable with the SOHC 18R.
In 1973, air injection was added to the Japan-market '''18R-GR''' for improved emissions. A [[fuel injected]] Japan-market version, the '''18R-GEU''', was produced from 1978 through 1982.
Competition versions of the 18R-G and -GE include those used in rally Celicas of the period. Some of these engines had 4-valve heads and developed up to 240 HP (180 kW) of power.{{Fact|date=June 2009}}
{| class="wikitable"
|-
! Code
! Power kW (HP)
! Torque N·m (ft·lbf)
! Years
! Comments
|-
| 18R-G
| 82–108 (110–145) at 6400 rpm
| 177 (131) at 5200 rpm
| 1973–1981
|
|-
| 18R-GR
| 104 (140) at 6400 rpm
| 169 (124) at 4800 rpm
| 1973–1975
| low compression for regular fuel
|-
| 18R-GU
| 97 (130) at 6000 rpm
| 162 (119) at 4800 rpm
| 1975–1978
| emissions control - Japan.
|-
| 18R-GEU
| 101 (135) at 5800 rpm
| 172 (127) at 4400 rpm
| 1978–1982
| EFI, emissions control (Japan).
|}
Applications:
* 1973-1981 [[Toyota Celica]] GT 2000
* 1982-1983 [[Toyota Celica]] GT 2000 (RA63)
* 1974-1983 [[Toyota Carina]] GT 2000
* 1978-1983 [[Toyota Camry|Toyota Celica Camry]] GT 2000
* 1973-1982 [[Toyota Corona]] GT 2000
===19R===
The 2-valve [[SOHC]] 2.0 L (1968 cc) '''19R''' was produced from 1974 through 1977.<br /> Cylinder bore was 88.5 mm {{convert|88.5|mm|1|abbr=on}} and stroke was 80 mm {{convert|80.0|mm|1|abbr=on}}. The crank was shared with the 18R.
Applications:
* 1974-1977 [[Toyota Corona|Corona RT103]], Japan
===20R===
The 2-valve [[SOHC]] 2.2 L (2189 cc) '''20R''' was produced from 1975 through 1980.<br />
Cylinder bore was 88.4 mm (3.48 in) and stroke was 88.9 mm (3.5 in). Aluminum alloy heads were used.
Initial output was 96 hp (72 kW) at 4800 rpm (90 hp in [[California]]) and 120 ft·lbf (162 N·m) at 2800 rpm. Power was down slightly from 1978 through 1979 at 95 hp (71 kW) at 4800 rpm and 122 ft·lbf (165 N·m) at 2400 rpm. The final version, from 1979 through 1980, was down again at 90 hp (67 kW) at 4800 rpm (95 HP Canada) and 122 ft·lbf (165 N·m) at 2400 rpm.
Applications:
* 1975-1980 [[Toyota Hilux]]
* 1975-1980 [[Toyota Celica]] U.S. Version
* 1975-1980 [[Toyota Corona]] U.S. Version
===21R===
The 2-valve [[SOHC]] 2.0 L (1972 cc) '''21R''' was produced from 1978 through 1987.<br /> Cylinder bore was 84 mm (3.31 in) and stroke was 89 mm (3.5 in).
Output in 1978, constrained by emissions, was 105 hp (78 kW) at 5200 rpm and 116 ft·lbf (157 N·m) at 3600 rpm. Air injection and [[California]] emissions equipment for the '''21R-C''' (1982-1985) dropped power down to 90 hp (67 kW) at 5000 rpm. The air-injected Japanese version, the '''21R-U''', produced 105 hp (78 kW) at 5200 rpm and 120 ft·lbf (162 N·m) at 3600 rpm but dropped to 101 hp (75 kW) at 5400 rpm and 114 ft·lbf (154 N·m) at 4000 rpm in 1986.
===22R===<!-- This section is linked from [[Toyota Celica]] -->
The 2-valve [[SOHC]] 2.4 L (2366 cc) '''22R''' was produced from 1981 through 1995. <br />
Cylinder bore was 91.9 mm (3.62 in) and stroke was 88.9 mm (3.5 in).
Initial output was 97 hp (72 kW) at 4800 rpm and 129 ft·lbf (174 N·m) at 2800 rpm. <br />
By 1990 the 22R was producing 108 hp (81 kW) at 5000 rpm and 138 ft·lbf (187 N·m) at 3400 rpm.
The first [[fuel injected]] '''22R-E''' engines appeared in 1983. <br />
Output of these engines is commonly rated at 105 hp (78 kW) at 4800 rpm and 137 ft·lbf (185 N·m) at 2800 rpm.
In 1985, the engine was significantly reworked, output was up to 112 hp (84 kW) at 4600 rpm and 142 ft·lbf (192 N·m) at 3400 rpm. Many parts from the newer '''22R-E''' are not compatible with those from the older pre-1985 engine. Non-compatible parts include the cylinder head, block, pistons and many of the associated parts such as the timing chain and cover, and water and oil pumps (although the oil pump internals are the same).
Toyota swapped the dual row timing chain used in older engines for a single row chain with plastic guides in 1983. This system reduced drag on the engine, but was inherently problematic. Every 80,000 to 140,000 miles, the chain stretches to the point that the hydraulic-operated chain tensioner can not take up any more slack. When this happens, the timing chain impacts driver's side chain guide, breaking the plastic within a few hundred miles of driving. If the engine continues to be operated after the guide breaks, the chain will stretch rapidly (an unfortunate characteristic of single row chains.) The loose chain causes inaccurate ignition timing which usually results in noticeable rough running. In continued operation the chain can jump a tooth on the drive sprocket or break entirely, with either case resulting in engine damage from valve-piston collisions.
The [[turbocharged]] '''22R-TE''' (sold from late 1985 through 1988) produced 135 hp (101 kW) at 4800 rpm and 173 ft·lbf (234 N·m) at 2800 rpm.
However, its weakness is high-end power. Thus, most ''performance'' enthusiasts usually prefer the Toyota [[Toyota_R_engine#18R-G|18R-G]], [[Toyota_T_engine#2T-G.28R.2FU.2FEU.29|2T-G]], [[4A-GE]] and [[Toyota 3S-GE|3S-GE]] 4-cylinder engines, The '''22R''' has a bigger displacement and a strong block, but its comparatively long stroke limits its use in high revving applications.
The engines are extremely well known for their durability, high fuel efficiency and good low to mid range torque.
{| class="wikitable"
|-
! Code
! Power kW (HP)
! Torque N·m (ft·lbf)
! Years
! Comments
|-
| 22R
| 72 (97) at 4800 rpm
| 174 (129) & 2800 rpm
| 1981–1990
| carb, dual row timing chain ('81-'82)
carb, single row timing chain ('83-'90)
|
|-
| 22R
| 81 (108) at 5000 rpm
| 187 (138) & 3400 rpm
| 1990–1995
|
|-
| 22R-E
| 78 (105) at 4800 rpm
| 185 (137) & 2800 rpm
| 1983–1984
| EFI, single row timing chain
|-
| 22R-E
| 84 (112) at 4600 rpm
| 192 (142) & 3400 rpm
| 1985–1995
| EFI, single row timing chain
|-
| 22R-TE
| 101 (135) at 4800 rpm
| 234 (173) & 2800 rpm
| 1986–1988
| turbocharged, single row timing chain
|}
Applications:
* 22R
** 1981 [[Toyota Corona]]
** 1981-1988 [[Toyota Hilux]]
** 1981-1984 [[Toyota Celica]]
** 1981-1995 [[Toyota Pickup]]
** 1984 [[Toyota 4Runner]]
* 22R-E
** 1985-1995 [[Toyota Hilux]]
** 1983-1985 [[Toyota Celica]]
** 1985-1995 [[Toyota Pickup]]
** 1985-1995 [[Toyota 4Runner]]
* 22R-TE
** late 1985-1988 [[Toyota Hilux]], 135 hp (101 kW)
** 1987 [[Toyota 4Runner]]
==References==
{{reflist}}
==See also==
* [[List of Toyota engines]]
* [http://www.toysport.com/Technical%20Information/22r_tech_notes.htm 22R Tech Notes] (Toysport)
* [http://www.toyoland.com/engines/20R.html Toyota 20R engines: details and photos] (Toyoland)
[[Category:Toyota engines|R]]
[[ja:トヨタ・R型エンジン]]' |
Whether or not the change was made through a Tor exit node (tor_exit_node) | 0 |
Unix timestamp of change (timestamp) | 1250650023 |