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What Petrol

Tech Talk for Rover owners.

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Posts: 219
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What Petrol

Post by Ralf the RR »

Went to fill up yesterday with LRP as I always have.
Most servos now don't stock it.
Tried 4 servos, and ended up at Woolworths+, where they had one pump only.

Since the heads are alloy, I assume they have hardened valve seats.
So will it run on unleaded?
Or is premium unleaded the go?

I checked a web site that said a low compression Rover engine is OK.
So is an 80 RR a low compression engine?

Also have a 79 4.4.
What fuel can it run on?
Harry

79 Rangie (his name is Ralf) 4.4 dual fuel, with plenty of other mods.

Oils leaks are a factory option to prevent rust!
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Post by GRIMACE »

You can run regular unleaded and buy a fuel additive for it from supercheap/autobarn or even some servos
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petrol

Post by Loanrangie »

Most early rangies are low comp 8.13/ 1 so reg unleaded is fine, some swear by premium but i dont find any difference. Maybe a h/comp will make more use of premium. Dont waste your money on an additive unless you have over 10/1 compression.
Saddle up tonto, its the not so loanrangie! . 98 TDI DISCO lightly modded with more to come.
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Post by GRIMACE »

That is great info if it is the case I think HSV should put a note in the tech section saying older low comp rangies can us regular unleaded
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Re: petrol

Post by RaginRover »

Loanrangie wrote:Most early rangies are low comp 8.13/ 1 so reg unleaded is fine, some swear by premium but i dont find any difference. Maybe a h/comp will make more use of premium. Dont waste your money on an additive unless you have over 10/1 compression.



I am 99% sure that there were no High compression rangies delivered to australia - are fuel was too shite - unless it has been modified you can assume low comp.

The old 3.5L V8 can virtually run LRP, Unleaded and Premium.

The 3.9L and 4.0L rangies and discos don't enjoy running on optimax as they tend to burn exhaust valves as I am told through our club
so stick to 91 Ron regular unleaded for them

Tom
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Post by landy_man »

my 84 aus built rangie is 9.35 compression ratio.... check on your heads... IIRC the compression ratio is stamped on there somewhere
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Post by RaginRover »

landy_man wrote:my 84 aus built rangie is 9.35 compression ratio.... check on your heads... IIRC the compression ratio is stamped on there somewhere


Yes that is right I meant to say that in my post but forgot !

Thanks Landy

Tom
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Post by Ralf the RR »

landy_man wrote:my 84 aus built rangie is 9.35 compression ratio.... check on your heads... IIRC the compression ratio is stamped on there somewhere


Well this info is excellent!

Anyone know where the stamed info is?
Harry

79 Rangie (his name is Ralf) 4.4 dual fuel, with plenty of other mods.

Oils leaks are a factory option to prevent rust!
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Post by landy_man »

IIRC it is on the passenger side rocker cover
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Post by Ralf the RR »

What about a P76 4.4L?
Can it run Unleaded?
(Yes we are stupid enough to have 2 Rangies.)

Rex is the yellow one pictured (wife's).
Mine is called Ralf. He is a 79 model, 4.4, white with flares, lifted, and other stuff. (A mans RR :) )
Harry

79 Rangie (his name is Ralf) 4.4 dual fuel, with plenty of other mods.

Oils leaks are a factory option to prevent rust!
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Post by Bush65 »

My 84 rangie had original stickers that said high compression ratio.

From what I could find out the valves and seats are OK with unleaded.

Mine runs better on lead replacement though. Most Caltex servos have lrp.
John
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Post by Ralf the RR »

Bush65 wrote:Most Caltex servos have lrp.


Have you checked lately?
The 3 other servos I went to stopped selling LRP as of 1 Jul.
Harry

79 Rangie (his name is Ralf) 4.4 dual fuel, with plenty of other mods.

Oils leaks are a factory option to prevent rust!
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Post by peter r »

.Peter
Last edited by peter r on Thu May 03, 2007 11:04 pm, edited 1 time in total.
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Post by Aquarangie »

I noticed on all early 3.9's they are all 8.13 CR, but my 93 Discovery 3.5 was 9.35. Top end performance was not far off the 3.9, but the mid-range torque was the big diffrence in both engines.

Just an obsevation.

Trav
Land Rover- The Collingwood of 4WD's!!!!
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