Toyota R Engine History

[river]

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
river

[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

[RONA]

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.
http://img93.imageshack.us/img93/2783/22refacts5ez.jpg

[river]

Hi,

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

[SeptemberSquall]

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

[Norbie]

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.

[RONA]

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.

[The Witzl]

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!!!

[Steve M]

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.

[OSJ]

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.

[OSJ]

Here is a pick of a 10R.

[river]

Hi,

no such thing as a 8RG or 10RG,just 10R.

Interesting. Can you provide documented evidence of this?

seeyuzz
river

[Lambolica]

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.

[Steve M]

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?

[jeffro ra28]

Has anyone any information in the 18rg that ran a gear, or belt timing setup? Also information on the twin plug 18rg like this.
http://img387.imageshack.us/img387/1069/t18rg8plug52mm44mmbigvalves3um.jpg
http://img387.imageshack.us/img387/4268/t18rg8plugjapanesetouringcars3.jpg

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.
http://img387.imageshack.us/img387/4973/2tor3tor2tggeartrain7mu.jpg

[The Witzl]

That head just doesnt seem right to be an 18R-G head.... the top rad / thermostat housing is mounted to the exhaust side.

BUT - that block looks 100% "R" to me.

[bnicho]

Hi,

Originally Posted by OSJ
no such thing as a 8RG or 10RG,just 10R.

Interesting. Can you provide documented evidence of this?

seeyuzz
river

He's half right. :) The 10R engine was supposedly renamed as the 8RG in 1971. See Stepho's website:

http://ourworld.compuserve.com/homepages/stepho/engcodes.htm

Cheers,

[Steve M]

That head just doesnt seem right to be an 18R-G head.... the top rad / thermostat housing is mounted to the exhaust side.

BUT - that block looks 100% "R" to me.

Dead right there, that's definitely an R block, and the oil holes in the head are spot on 18R.
Would have to be some very limited run thing I reckon, what with the valves being 52mm/44mm and all. Those intake valves don't look much like my TRD valves, no dish in their head, but the exhaust valves do (from what I can tell from the photo).
Remember that 18R single cam engines have their water outlet on the left side of the car, so maybe this was designed to go in a car with an 8R or some other single cam R engine.

Jeffro, I don't reckon that gear set is complete, I just don't see how it would work with the top right cog obviously being designed for a chain drive.

*EDIT*
It is for either a 2TG of 3TG.
The chain drive kits only replace the bottom chain. That chain patterned gear in the top right actually replaces the large curved timing guide on the left side of the head.
Not sure if this is the case with the R series TRD ones, but the one picture is of the same design as 1980's HKS kits, but the bracket shape is different on that top one.

hmm, I wonder if RollMaster could make up an 18RG gear drive set??
If I remember later I might have a chat to a place over here that makes gear box cogs.

For those who are interested I found a manufacturer of 2TG kits and 2TG/18RG adjustable cam gears.

[urantia]

that explains why my corona kicked more ass then everone elses.

Dad picked up an 18-RU for $250, and that thing flew compared to other corona's.

[OSJ]

Sorry River you were right about the 8RG,I checked my master catalogue,the 10R(not 10RG)became the 8RG in 1971.This whole thing is making me twitch.The 10R and 8RG are just about identical.

[The Witzl]

Just got the following off an original Toyota engine ID plate....

Engine model - 2R
No. of cylinders - 4
Bore - 3.07in / 78mm
Stroke - 3.07in / 78mm
Piston Displacement - 90.9cu.in /

[andyroo]

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

yeah boy! Go the Air injection!

[lilcrash]

comment withdrawn

[OSJ]

The 2R is a 1.5 litre,positive!

[lilcrash]

comment withdrawn

[o_man_ra23]

Jeffro, Perhaps that 8plug 18RG head was one of the VERY limited run race motors which were supposedly a german re-design of the Yamaha head. Though i thought those motors were 16 Valve. If it is the head im thinking of though, and the rumours are tru, then that head wont fit on a normal 18R block, there were special blocks made, 500 all told, which looked 18R, felt 18R, fit in the place of 18R, but had no numbers stamped, and different head fittings.

Wonder if anyone else has any more info on the rumours i heard about 5 or 6 years ago??

Cheers, Owen

[aussie_stu]

hey gang, ressurecting this one to ask, did aus ever get the 8R and if so what in?

[LeeRoy]

If you go to www.wikipedia.com/wiki/ and search toyota, there is a list of all their motors and im pretty sure it lists what they came in and where they were delivered.

- LeeRoy

[-==L=a=N=c=E==-]

Could you count the 2rz and 3rz engines? to me they are like beefcake 22r on steriods.

[bnicho]

hey gang, ressurecting this one to ask, did aus ever get the 8R and if so what in?

Hi,

The 8R was fitted to the RT72 Toyopet Corona Mark II 1900SL hardtop. These came to Aus in limited numbers in 1969-70.

Cheers,

[crowncustom]

Yes Owen that was it about the twin plug 18RG, if I remember I think I have some info about these engines on my computer somewhere i'll post it if I have.
And regarding the 2R,9R,and the 2R is definitely 1.5 litres and the 9R came out in the RT55 Corona GT 5.I do have pics of one if someone can tell me how to post them?
The 4R engine came out in the RT40 Corona 1600S.They were identical to the 2R block with increased bore size(1587cc opposed to 1490cc)had factory twin Asian SU carbs,9.2 high comp pistons,highlift cam which used longer lifters than the standard 2R and shorter pushrods.Factory ported head with larger valves and a balanced bottom end.I owned 2 of these Corona's.
Cheers Brett.

[aussie_stu]

ah well seems chances of finding an 8r head are slim, have been comtemplating an 8r/18r hybrid :D

[mike1980ra40]

ah well seems chances of finding an 8r head are slim, have been comtemplating an 8r/18r hybrid :D

hows this for a hybrid. one of my early celicas (1979 jap import) had a bizarre setup.
cylinder block was 20R and the head was 18R (if not it was 18R valve cover on 20R head ? )

anyway tell tale signs it was a 20R block was the first 3 digits on the engine number,
S shaped oil pick up tube and the air injector manifold. another thing that makes me think
there was an 18R head on this was the fact that the valve cover had 18r stamped on it
and I am using the extractors from it on my 18R right now.

Also it was running a 16R dizzy with Lumenition optical ignition.

It makes me think... if an 18R head was on a 20R block, then an 18RG head should as well.
then maybe stroke it with 16R conrods. ???

[o_man_ra23]

20r block and 18r head dont mate... not without super mega custom setups. 2XRs are interchangeably between heads and blocks, and 18R and previous are interchangeable between motors with similar valve train setups(pushrod head wont fit OHC bottom end)

Also, 20R runs its oil pump from the crank, whereas 18R runs oil pump from the auxillary shaft. 20R doesnt have an auxillary shaft, and runs single row timing setup, 18R runs dual row timing.

If there is an 18R head on a 20R bottom end... the 20Rs are rare as rockin horse crap here in aus, and there is a LOT of custom work done to that motor (plus the 18R head is crap, so why would you bother?? 20R head is soooo much better)

I want to see more about the twin spark 18RG.... PLEASE!!

Cheers, Owen

[mike1980ra40]

what ever the top end setup was it was punchy motor and had a 3.9 diff in it and went
nice and hard. I was kicking my self several months after I had it all sent of to scrap :(

cheers. :)

[Stefan]

2XRs are interchangeably between heads and blocks

Not true. To refer to my post in this thread:
http://www.toymods.net/forums/showthread.php?t=8442


OK guys, this is the deal. In the US, they mod 2xR engines and ahve aftermarket support. Here, there really isn't any. There are 2 versions of the 22R, with different C/R, incompatible (without milling etc) heads, etc. We got the later version in '85 with the RA65, that other parts of the world (i.e. US) got along with later, TCCS EFI... but we got it with the older Analog EFI. My guess is that this is becasuse the analog EFI could be tweaked to cope without an O2 sensor - we were on leaded petrol at the time. Later 'ronas got the TCCS EFI, AFAIK. The Analog EFI is more 'tweak friendly' IIRC.

A 21R is similar to an early 22R, so the head wil not directly swap, AND it is not like a 20R anyway so there is no benefit from doing so.

The main ways to improve a 22R are extractors, cams, porting. Mild cam will work with unported head, as the stock cam is so poor, but anything more needs headwork. Cams would have to be bought from the US, really... I ran the specs of the Crow Cams 22R cam by the guys in the US and they we're impressed. Extractors can be bought here. If you did all this, I imagine the engine would be quite thirty and would have cost a bit... but at least it would be tough.

[RT104GT]

He's half right. :) The 10R engine was supposedly renamed as the 8RG in 1971. See Stepho's website:

http://ourworld.compuserve.com/homepages/stepho/engcodes.htm

Cheers,


8RG was fitted to 1900gsl, not ony have I seen one I drove the car owned by Don Bruce Toyota in 1972.

There was an 8RG coupe for sale on ebay last year..

[RT104GT]

ah well seems chances of finding an 8r head are slim, have been comtemplating an 8r/18r hybrid :D

I heard of an 8R head in a 1900sl in Stawell a few months ago.

I fitted an 8RB head on an 18R in 1974.

I have used an 8RB in a 1600S then the 8RB on an 18R.

I ran a weber single and extractors.

It was never as fast as my 18RG.

8Rb cam gear is same as TOYOTA 18rg (Not yamaha).

[soulfire]

I have a bucket load of information on hybrid 21r/22r motors and i have also squished a lot of rumors.

To keep it short and sweet, I am running a 21r-c head on a late model 22r block with very minor modifications!

[river]

Hi,

I'd like to know what came first... the 18R or the 18R-G?

If it's the 18R then some dude would of looked at it and said it's a load of crap and designed a better head to make the 18R-G.

Alternatively, if the 18R-G came first, did some clown come along and say "hey, I can turn this wonderful engine into poo" and thus turned the 18R-G into an 18R. :confused:

I have never understood why the 18R did not have a crossflow head like the 2T.

seeyuzz
river

[MWP]

Reason behind the 18R non-xflow head would be emissions and fuel economy.
Both of which are improved by heating the inlet manifold, increasing fuel atomisation.
Bad for power of course tho :(

[river]

Hi,

Hmmm, well I wouldn't exactly say the 18R-C is a prime example of fuel efficiency.

seeyuzz
river

[hosking1991]

I have to disagree with you river sorry :P, my 18rc in my ra40 was fully reco'd with a stage 2 cam and weber carby jetted to suit and would pull 11 litres per 100k's round town and around 9-10 on a trip :)

[Steve M]

I got 7L / 100km from my 1mmOS 18R-C. I was very happy.
I wasn't so happy about it revving at 4000RPM at 100km/h in fifth gear, but at least it was cheap to run.

I guess that old theory of driving close to maximum torque for best fuel efficiency may be correct.

18R was a 'commercial' type engine in the 1960's wasn't it?. That would explain the lack of exitement provoking design.

[hosking1991]

I have to disagree with you river sorry :P, my 18rc in my ra40 was fully reco'd with a stage 2 cam and weber carby jetted to suit and would pull 11 litres per 100k's round town and around 9-10 on a trip :)


also that economy was with me giving it a hard time 6200 rpm shifts LOL

[river]

Hi,

7l/100km!!!

I'd be dreaming if I got that. I got around 9-10l per 100km driving back from Melbourne, and that's highway cruising. Around the city I'm lucky to break under 11-12l per 100k.

Maybe it's 'cos it's an auto and lacks overdrive, 'cos the 18R-G in the 25 gets better economy than either of the 18R-C cars I own. Mind you, if you thrash the 18R-G, like I did when I was younger, it could guzzle petrol like there's no tomorrow.

seeyuzz
river

[The Witzl]

My 18RGEU would get 650kms on the highway, from 45L - which is 6.9L/100kms.
In the city it was more like 10L/100kms.

[shoom]

does anyone know the lowdown on celicas actually being available in Australia with the twincam engines? I had assumed these factory hotrod engines were all bought over in the mid to late 80s to mid 90s by importers and retrofitted into the no frills aussie models?

also would anyone know if a 60s corona with a 2R would be able to accept an 18R 5 speed being from the same family?

[hosking1991]

afaik no adm model celica rwd came factory with a factory twin cam (whether it be a 2t-g or 18-rg)

[river]

Hi,

I think MAD79R is currently working on a project that will replace a 2R with an 18R-G. It may be best to speak with him as I am not sure how easy it is to bolt up... ie x-members etc.

seeyuzz
river

[river]

Hi,

does anyone know the lowdown on celicas actually being available in Australia with the twincam engines? I had assumed these factory hotrod engines were all bought over in the mid to late 80s to mid 90s by importers and retrofitted into the no frills aussie models?

As Hosking has posted, no Aussie RWD Celicas came with twin-cam engines... except for the very, very few that were officially imported by AMI/Toyota (mainly for evaluation of the GT models for the Australian market - which never eventuated, and hence why only LTs were imported). And a few private imports. But yes, in the 70s, 80s and 90s the twin cam engines were brought over by importers.... and we had a field day putting them into our cars.

seeyuzz
river

[crowncustom]

does anyone know the lowdown on celicas actually being available in Australia with the twincam engines? I had assumed these factory hotrod engines were all bought over in the mid to late 80s to mid 90s by importers and retrofitted into the no frills aussie models?

also would anyone know if a 60s corona with a 2R would be able to accept an 18R 5 speed being from the same family?

No early Australian Toyota came out with Twin Cam Engines only private imports.Most if not all the early twin cams were bought into Australia through importers between the early 80's and 90's.
An 18R or RG will fit into the engine bay of the old Shovelnose Rona.I did a RG conversion in one of these about 10-20yrs ago.
Cheers Brett.

[RAAAH23]

Hi,

7l/100km!!!

I'd be dreaming if I got that. I got around 9-10l per 100km driving back from Melbourne, and that's highway cruising. Around the city I'm lucky to break under 11-12l per 100k.

Maybe it's 'cos it's an auto and lacks overdrive, 'cos the 18R-G in the 25 gets better economy than either of the 18R-C cars I own. Mind you, if you thrash the 18R-G, like I did when I was younger, it could guzzle petrol like there's no tomorrow.

seeyuzz
river


i know all about it :o

58 Litre tank 220 Km, Shell V-Power $85~ :cool: luckily i dont pay for petrol the magical shell card pixie comes and pays for it.. that or my dad pays the bill either way im not too fussed:P

[river]

Hi,

I get about 230km for 45litres on Trini... a mere humble 18R-C. It's always got this and it is tuned correctly.

For me, it is not a miserly engine.

seeyuzz
river

[hosking1991]

What does an auto 18r rev at cruising at 110?

[river]

Hi,

4k!

seeyuzz
river

[hosking1991]

thats pretty crappy! with my w50 and 18rc i was seeing around 3100rpm @ 100km/h