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Thread: Toyota R Engine History

  1. #1
    Toymods Net Nazi Too Much Toyota river's Avatar
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    Default Toyota R Engine History

    Hi,

    I was so impressed with the M erngine history that I went and plagerised some information that highlights the R series engines. This info, plus a lot more, is off the net, however having it here makes it easier for forum members to find. I hope this is okay - if not then please delete it.



    The Toyota R family was a series of straight-4 engines produced from 1953 through 1990. It was designed for longitudinal use in such vehicles as the Celica and Cressida. OHC versions featured a chain-driven camshaft.

    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). A LPG version, the R-LPG, was produced for the last two years.

    The R engine was the first Toyota engine to be used in a United States-market vehicle, in the 1958 Toyopet Crown. Output for that engine was 60 hp (45 kW) at 4400 RPM with 79.5 ft.lbf (108 Nm) of torque at 2600 RPM.

    2R
    The 1.5 L (1490 cc) 2R family was produced from 1964 through 1969. Again, an LPG version, the 2R-LPG, was produced alongside the gasoline version all five years.

    3R
    The 1.9 L (1897 cc) 3R family was produced from 1959 through 1968. A 3R-B version was offered from 1960 through 1968, and an LPG 3R-LPG variant was made for the last five years.

    4R
    The 1.6 L (1587 cc) 4R family was produced from 1965 through 1968. Bore was 78 mm.

    5R
    The 2.0 L (1994 cc) 5R family was produced from 1968 through 1986. It was a 2-valve OHV engine. Cylinder bore was 88 mm (3.46 in) and stroke was 82 mm (3.23 in).

    Output was 106 hp (79 kW) at 5200 RPM and 125 ft.lbf (169 Nm) at 3000 RPM. An LPG version, the 5R-LPG, was produced from 1968 through 1983.

    6R
    The 1.7 L (1707 cc) 6R was produced from 1969 through 1974. The 6R-B was produced those same years, and the LPG 6R-LPG was produced from 1970 through 1973.

    7R
    The 1.6 L (1591 cc) 7R was produced from 1968 through 1971. The 7R-B was produced from 1968 through 1969, and the LPG 7R-LPG was produced from 1969 through 1970.

    8R
    The 1.9 L (1858 cc) 8R was a major departure for the R family. With a 2-valve SOHC head, it impressed contemporary reviewers. The engine was produced from 1968 through 1972 and was also available as the 8R-B, 8R-E, and California-spec 8R-C. Output was 108 hp (81 kW) at 5500 RPM and 113 ft.lbf (153 Nm) at 3800 RPM. Cylinder bore was 85.9 mm (3.38 in) and stroke was 80 mm (3.15 in).

    8R-G
    The Toyota again upped the ante with the DOHC (but still 2-valve) 8R-G in 1969. Output was 140 hp (104 kW) at 6400 RPM and 123 ft.lbf (166 Nm) at 5200 RPM. This engine was also produced through 1972.

    9R
    The 1.6 L (1587 cc) 9R was produced from 1967 through 1968. Output was 110 hp (82 kW) at 6200 RPM and 101 ft.lbf (136 Nm) at 5000 RPM. It was a 2-valve DOHC design.

    12R
    The 1.6 L (1587 cc) 12R was produced from 1969 through 1988. An LPG version, the 12R-LPG, was produced from 1969 through 1983.

    16R
    The 1.8 L (1808 cc) 16R was produced from 1974 through 1980 with 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 18R produced 86-89 hp; (64-66 kW) and 105-107 ft.lbf (142-145 Nm). It was also available in California spec (18R-C) from 1971 through 1974. Output was 97 hp (72 kW) at 5500 RPM and 106 ft.lbf (143 Nm) at 3600 RPM. The Japan-spec 1975-1981 18R-U produced 100 hp (75 kW) at 5500 RPM.

    18R-G
    The 2-valve DOHC 18R-G was produced from 1972 through 1974. Output was 110-145 hp (82-108 kW) at 6400 RPM and 131 ft.lbf (177 Nm) at 5200 RPM. It was also available in Japan-spec (The 1975 18R-GU) with 130 hp (97 kW) at 6000 RPM.

    Air injection was added in 1975's 18R-GR for improved emissions. Output was 140 hp (104 kW) at 6400 RPM.

    A fuel injected Japan-market version, the 18R-GEU, was produced from 1978 through 1982. This pushed output up to 135 hp (101 kW) at 5800 RPM and 127 ft.lbf (172 Nm) at 4400 RPM.

    20R
    The 2-valve SOHC 2.2 L (2189 cc) 20R was produced from 1975 through 1980. Cylinder bore was 88.4 mm (3.48 in) and stroke was 88.9 mm (3.5 in).

    Initial output was 96 hp (72 kW) at 4800 RPM and 120 ft.lbf (162 Nm) at 2800 RPM. Power was down slightly from 1978 through 1979 at 95 hp (71 kW) at 4800 RPM and 122 ft.lbf (165 Nm) at 2400 RPM. The final version, from 1979 through 1980, was down again at 90 hp (67 kW) at 4800 RPM and 122 ft.lbf (165 Nm) at 2400 RPM.

    21R
    The 2.0 L (1972 cc) 21R was produced from 1978 through 1987. Cylinder bore was 84 mm (3.31 in) and stroke was 89 mm (3.5 in). It was a 2-valve SOHC engine.

    Output in 1978, constrained by emissions, was 105 hp (78 kW) at 5200 RPM and 116 ft.lbf (157 Nm) 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 Nm) at 3600 RPM but dropped to 101 hp (75 kW) at 5400 RPM and 114 ft.lbf (154 Nm) at 4000 RPM in 1986.

    22R
    The 2-valve SOHC 2.4 L (2366 cc) 22R was produced from 1981 through 1995. Cylinder bore was 91.9 mm (3.62 in) and stroke was 88.9 mm (3.5 in).

    Initial output was 96 hp (72 kW) at 4800 RPM and 129 ft.lbf (174 Nm) at 2800 RPM. By 1990 the 22R was producing 108 hp (81 kW) at 5000 RPM and 138 ft.lbf (187 Nm) at 3400 RPM.

    The first fuel injected 22R-E engines appeared in 1983. Output of these engines is commonly rated at 105 hp (78 kW) at 4800 RPM and 137 ft.lbf (185 Nm) 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 Nm) at 3400 RPM. Many parts from the newer 22R-E are not compatable with those from the older pre-1985 engine.

    The turbocharged 22R-TE (sold from 1984 through 1988) produced 135 hp (101 kW) at 4800 RPM and 173 ft.lbf (234 Nm) at 2800 RPM.

    The 22-R and its variants were very common in the U.S. market. The engines are well known for their durability and low to mid range torque; However, its weakness is high-end power. Thus, most performance enthusiasts usually prefer the Toyota 18R-G, 3T-G, 4A-GE and 3S-GE 4-cylinder engines, even though the 22R has a bigger displacement and a strong block.

    seeyuzz
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  2. #2
    ST185 GrpA #135 Automotive Encyclopaedia Toobs's Avatar
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    Default Re: Toyota R Engine History

    Got any more specs on this "8RG"? It seems a bit ahead of its time and from the power output listed it would seem to show that toyota went downhill from there... even with the 18RG

  3. #3
    Junior Member Too Much Toyota RONA's Avatar
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    Default Re: Toyota R Engine History

    My figures for the 22re suggest a tad more River, being 87kw at 4800rpm and 198Nm of torque at 2800rpm. Considering mine put out 63.2rwkw (at approxiamately 4100rpm) i'd take the latter and as too my knowledge aparts from being reconditioned it is stock.

  4. #4
    Toymods Net Nazi Too Much Toyota river's Avatar
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    Default Re: Toyota R Engine History

    Hi,

    Quote Originally Posted by Toobs
    Got any more specs on this "8RG"? It seems a bit ahead of its time and from the power output listed it would seem to show that toyota went downhill from there... even with the 18RG

    According to a quick search on the net.....

    The 18RG was first introduced as an 8RG and as an interim 10RG (both 1900cc) in 1971 for the Celica GT models and the Mark II, respectively. The 2000cc 18RG came out in 1974 with twin-side Mikunis in 18RG, 18RGR, and 18RGU models. Eventually it came with fuel injection as an 18RGEU.

    Judging by the above it appears that the 8/10RG was given a slight increase in capacity (1900cc to 2000cc) and renamed the 18RG. However, I need to do more investigation and I'd like to see a picture of the 8RG (and the 10RG).

    seeyuzz
    river
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  5. #5
    Aerial Superpony Domestic Engineer SeptemberSquall's Avatar
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    Default Re: Toyota R Engine History

    Corrections:

    8R-G is a common fanboy description of the DOHC 8R in consideration of later 18R-G and 2T-G etc. However at this time the -G suffix was not in use and the DOHC 8R was actually called 10R.

    Also, the -C suffix does relate to the low-emmissions variant of each engine, including in many cases EGR, air injection, etc. But I'm not sure it's specifically meant to represent -C for California; I think that's a convenient fanboy euphamism again.

    edited for misleading info, sorry
    Last edited by SeptemberSquall; 06-01-2006 at 12:50 AM.

  6. #6
    Toymods Pimp Chief Engine Builder Norbie's Avatar
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    Default Re: Toyota R Engine History

    Quote Originally Posted by SeptemberSquallIndustries
    As a packaging example, the IS200/IS300 (GXE1## etc.) has 1G-FE and I think 2JZ-FE ~ and is a relatively compact car for a six, originally set up for 3S-GE and etc. in the home market.
    Actually the IS300 has a 2JZ-GE. I doubt packaging would be a major concern (width wise) when we're talking inline engines in a north-south orientation.

  7. #7
    Junior Member Too Much Toyota RONA's Avatar
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    Default Re: Toyota R Engine History

    Quote Originally Posted by SeptemberSquallIndustries
    Also, you'd expect to see the more compact -F cam drive arangement used where packaging was a concern (ie. econoboxes ie. 4A-F Corolla, etc). But IIRC Bill Sherwood was also undertaking a serious A engine build for race use with a 4A-F head.
    As a packaging example, the IS200/IS300 (GXE1## etc.) has 1G-FE and I think 2JZ-FE ~ and is a relatively compact car for a six, originally set up for 3S-GE and etc. in the home market.
    Not really i mean look at BMW 3 series and 1 series similar size platform and have inline sixes, and the IS300 weighs like 1500kg so whilst it may be 'small' it ain't light weight.

  8. #8
    MR 18RG Chief Engine Builder The Witzl's Avatar
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    Default Re: Toyota R Engine History

    what does BMW have to do with the Toyota "R" series engines????

    .... back to the topic at hand please....

    EDIT: i have decided to create a thread dedicated to the 18R-G. It deserves it!!!
    Last edited by The Witzl; 27-09-2005 at 11:22 AM.
    ...... butt scratcher?!


  9. #9
    I'm no Domestic Engineer Steve M's Avatar
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    Default Re: Toyota R Engine History

    Here's a link to a rebuild page for a 9R, it's definately worth a look for anyone interested in toyota twin cams, it, along with the 3M started it all of for production vehicles.

    http://www.rs-yasu.jp/rt55%20corona.htm

    It's design is very different, being a three main bearing block and the timing guides are also very different from an 18RG. It basically looks like mini 3M.

    I think it was based on a 4R block.
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  10. #10
    Junior Member Backyard Mechanic
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    Default Re: Toyota R Engine History

    Yes the 9R block is identical to the 4R,it even has a plate blocking off where the old dizzy used to go,and yes no such thing as a 8RG or 10RG,just 10R.

  11. #11
    Junior Member Backyard Mechanic
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    Default Re: Toyota R Engine History

    Here is a pick of a 10R.
    Last edited by OSJ; 20-06-2006 at 07:51 AM.

  12. #12
    Toymods Net Nazi Too Much Toyota river's Avatar
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    Default Re: Toyota R Engine History

    Hi,

    Quote Originally Posted by OSJ
    no such thing as a 8RG or 10RG,just 10R.
    Interesting. Can you provide documented evidence of this?

    seeyuzz
    river
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  13. #13
    Toymods Club Member #194 Conversion King Lambolica's Avatar
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    Default Re: Toyota R Engine History

    16R Conrods are commonly used to stroke the 18R out to 2.4lt

    This is in combination with 22R-E pistons and 20r crank.

    Using 22R pistons alone brings the 18R out to 2150cc.
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  14. #14
    I'm no Domestic Engineer Steve M's Avatar
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    Default Re: Toyota R Engine History

    It would be good to have what cars the engines were in under each car heading.
    I'll start:
    9R - JDM RT55 Corona, I think it was knwn as a mach 2 over there.

    What model did the 10R com from?
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  15. #15
    ......... Carport Converter jeffro ra28's Avatar
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    Default Re: Toyota R Engine History

    Has anyone any information in the 18rg that ran a gear, or belt timing setup? Also information on the twin plug 18rg like this.



    This is a gear timing setup from either a 2t,3t or 2tg, i know tis not an R series, but someone may be able to relate this to a geartrain setup for an 18rg.

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