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Old 21 May 2011, 18:22   #1
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Range Rover V8 4.6 '98 LPG Conversion

Anyone done this?

What sort of consumption did you end up with, what did it cost, any tips?
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Old 21 May 2011, 18:27   #2
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Anyone done this?

What sort of consumption did you end up with, what did it cost, any tips?
Doggypaddle would be the guy to ask-if it's got a V8 Rover in, he's either done it or messed with it.

Personally I'd flog it and buy a diesel though. The cost of LPG conversion would be a large proportion of the value of a '98 RR (around 1500 for the conversion IIRC) and 1500 buys an awful lot of fuel. It won't cost much less than a diesel to run afterwards-specially not when you factor in the conversion cost and the lifespan of a RR that lives next to the coast before it starts to rot.
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Old 21 May 2011, 18:38   #3
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On the other hand Nos, the 2.5 TDI in an RR is flater than a witches t*t. At least the 4.4 on gas would have some beans about it.
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Old 21 May 2011, 18:40   #4
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On the other hand Nos, the 2.5 TDI in an RR is flater than a witches t*t. At least the 4.4 on gas would have some beans about it.
Yeah, but I didn't say buy a diesel RR, just a diesel.
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Old 22 May 2011, 02:23   #5
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Personally I'd flog it and buy a diesel though. The cost of LPG conversion would be a large proportion of the value of a '98 RR (around 1500 for the conversion IIRC) and 1500 buys an awful lot of fuel. It won't cost much less than a diesel to run afterwards-specially not when you factor in the conversion cost and the lifespan of a RR that lives next to the coast before it starts to rot.
I take your point. The upside of the current RR is is low mileage (65K) for its age and so far pretty reliable, I have ironed out the few faults that it came with. The body and interior are in very good condition for their age. I think if i flogged it and spent similar money on another one i would not be looking at such a good car and would take a hit on quality. I am not really a fan of buying 13 yr old vehicles but this one came from a mate.

Anyone got any figures i can base a more scientific decision on?
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Old 22 May 2011, 03:57   #6
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My neighbour has an RR with LPG...it's an early Jag engined 4.2V8 RR - and therefore the new shape - but the following still applies.

To me, whilst he thinks it's the dogs whats-its, the maths don't add up. He tells me it does less mpg on LPG than petrol and cost 1500 to convert. Most people think their car does more mpg than it actually does so when he says it does less, and he's a supporter of LPG, I'm moved to believe him. Plus, there's occasional 'niggles' with the LPG system involves a long round trip to get them looked at as local expertise is non-existant. Plus, there's that tank.

I can speak to him about more numbers and details if you wish. Last time I spoke he was claiming 18mpg on petrol, less on LPG. My RR Sport diesel does 28mpg.

For me...diesel every time.
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Old 22 May 2011, 04:48   #7
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My neighbour has an RR with LPG...it's an early Jag engined 4.2V8 RR - and therefore the new shape - but the following still applies.

To me, whilst he thinks it's the dogs whats-its, the maths don't add up. He tells me it does less mpg on LPG than petrol and cost 1500 to convert. Most people think their car does more mpg than it actually does so when he says it does less, and he's a supporter of LPG, I'm moved to believe him. Plus, there's occasional 'niggles' with the LPG system involves a long round trip to get them looked at as local expertise is non-existant. Plus, there's that tank.

I can speak to him about more numbers and details if you wish. Last time I spoke he was claiming 18mpg on petrol, less on LPG. My RR Sport diesel does 28mpg.

For me...diesel every time.
I did actually consider buying an already converted LPG V8 RR or V8 Disco a couple of months ago when I changed cars so did a bit of research.
From what I could find out,it will do less mpg on LPG (and be slightly down on power-but with the amount of power from a 4.6 RR it's a moot point really).
The saving is based on miles per as LPG is so much cheaper, not MPG. I think the road tax is cheaper for a dual fuel car too.

However, unless you go for an underslung tank (I don't like that idea much) you'll lose a lot of boot space. Range won't be as far on LPG unless the tank is absolutely huge too and the ones I looked at still had to be warmed up on petrol.

I bought a diesel Toyota.
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Old 22 May 2011, 04:53   #8
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It will do less mpg on LPG (and be slightly down on power-but with the amount of power from a 4.6 RR it's a moot point really). The saving is based on miles per as LPG is so much cheaper, not MPG.
Yes, but how many miles do you have to do to offset the 1500 and how long does that take?

Hang on...Nos you changed your post
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Old 22 May 2011, 05:12   #9
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Yes, but how many miles do you have to do to offset the 1500 and how long does that take?

Hang on...Nos you changed your post
Yeah,I realised I had left a load out.
Just doing the maths... On petrol at current prices at 18mpg, 3 miles per so that 1500 gives you around 4500 miles.With around a 30% saving on LPG-about 4 miles per .

If my figures are correct, 18,000 miles not including cost of servicing the LPG system.

Finished messing with this post now
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Old 22 May 2011, 06:11   #10
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Nos

I think your right, the conversion is not a particularly good investment.
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