There is another thread here about LPG but not much detail. I looked into this myself recently, I thought that maybe getting rid of the TD6 and it's 104 litre diesel fill ups at the extortionate rates could be lessened. I had a real whizzy idea of getting a 2nd hand Supercharged Range Rover with one year's warranty, low miles for about �30k, then spending the money on an LPG conversion and having the best car ever for little fuel expense.

I did lots of research and here are the facts before you jump into it. These are Base 101 and onwards...

LPG conversions can only be done on petrol engine cars (of course!)
Conversions costs vary from about �1700 for a small family car upwards
JE Engineering will do it for �3K for a normal 4.4 petrol, or �3500 + VAT for a Supercharged FFRR, RRS SC or D3.
The Supercharged engine, the Sport and the Disco conversions have been problematic and have engine fault light issues - JE are suspending conversions until this is fixed
You'd need to spend a large amount on Petrol or diesel to recoup the costs ( I do a minimum of 20K a year and would still need to achieve 16 mpg from a FFRRSC to pay it back within 2 years!)
Doing 20,000 miles a year yould save �1600 on fuel as compared to diesel if you manage 16mpg.
There is a minor reduction in your Tax disc for getting it done (�10-20!)
Your insurance WILL increase marginally
You CANNOT take your converted car on the Eurotunnel
Any Land Rover warranty on the car is completely and TOTALLY voided. Even if the stereo breaks, you cannot claim on warranty, they will not touch your car.
You will also have to take your car elsewhere for servicing for the same reason
Your MPG will decrease on LPG by about 2-3 miles and the performace is marginally affected also
The LPG tanks although stated as 95 litres can actually only get about 85-88 litres filled and sit in the spare wheel well
You keep the standard fuel tank so you effectively have nearly 200 litres of fuel on board
The engine always starts on petrol then switches to LPG automatically
A small interior switch tells you the amount of LPG left
The conversion takes about 5 days and typically comes with a 2 year warranty

You can get 4.4 petrol lpg converstion done by alternative fuel in barking essex with 5 year, 60,000 miles warrenty ,best prinz system installed for only 1850 pounds, had it fitted last week and works like dream!

Do they warranty the whole car, replacing the lost LR warranty? If not, then the above still applies  Halfway Down The Stairs,
Is the Stair Where I Sit.

shmoogle wrote:

Do they warranty the whole car, replacing the lost LR warranty? If not, then the above still applies

My 4.4 is booked in for conversion next week. there is a caution on all 4.2 S/C conversions. Apparently valve seal problem reported so most reputable garages will insist on installing a flash lube system which will add about �175 or so on to price of standard conversion. Also on our cars they need to relocate the air compresssor and never get the seal as good as factory standard ...as a result compressor is slightly noisier afterwards.

Thanks for the update on that one. Discovery 4 HSE
1998 110 TUM HS FFR Hard Top XD WOLF
1982 Series 3 Hard Top

*Gone:L462 D5 HSE LUX, L663 Defender 110 HSE, Discovery 3 HSE, 2014MY Range Rover Sport 5.0 Supercharged AB Dynamic; L405 Exec Vogue SE 4.4, 5.0 Supercharged Autobiography, Defender TDCi XS CSW, Defender TD5 HT, Vogue SE TDV8, Vogue TD6, RRSport SC 4.2V8, Classic 3.9 Vogue Auto, Land Rover Series 3 SWB

RRUK. In your first post, were you talking about a G2 system or a G3 system?.

I'm not certain, we'd have to call JE Engineering to ask what theirs is Discovery 4 HSE
1998 110 TUM HS FFR Hard Top XD WOLF
1982 Series 3 Hard Top

*Gone:L462 D5 HSE LUX, L663 Defender 110 HSE, Discovery 3 HSE, 2014MY Range Rover Sport 5.0 Supercharged AB Dynamic; L405 Exec Vogue SE 4.4, 5.0 Supercharged Autobiography, Defender TDCi XS CSW, Defender TD5 HT, Vogue SE TDV8, Vogue TD6, RRSport SC 4.2V8, Classic 3.9 Vogue Auto, Land Rover Series 3 SWB

Quote:

JE use OMVL, Tartarini or Prins sequential injection systems where LPG is introduced through one injector per cylinder. There is therefore no additional restriction in the engine inlet airflow & no reduction in power.

No problems with the BMW 4.4 engine(with or without flash lube) because it has hardened valve seats.
Later Jag engine hasn�t and so the valves will engrave the seats and that will force trouble (even with or without flash lube). XJC, RRV8, Series1 86 and 107% of real pleasure

Interesting post, after about 2 yrs running on a BRC system I agree about a slight mpg degradation but it runs a fraction cooler on LPG , the low down and mid range performance is more lively and the engine is quieter . The loss of about 1-1.25 mpg is what I have experienced Regards

Rob

Have to say this seems to be a mixture of fact and "local dealers interpretation of warranty rules".
1. You can fit LPG to a diesel, however this system effectively replaces 10-20% of the diesel so is never going to be cost effective.
2. My admittedly last of the P38 v8 4.o was converted to the STAG system lpg for some �1400. some 8 months ago. Because Stag use all the original engine sensors etc. no probs at all.
Proffautogas of S wales do a "same day service" admitedly you have to arrive at 0700 and car is not ready until 1900 hrs - but they give you a loan car.
3. think maths may be wrong (admittedly using my average MPG around town)
20000 divided by 12 (mpg) = 1666
1666 x 4.5 = 7580 (litres)
7580 x �1.25 (unleaded) = �9475 cost of petrol
7580 x �0.71 (dearest lpg) �5381 cost of lpg
Savings = �4094 per annum.
Even using 17mpg as a base figure (my "on a run" mpg) the saving per annum is still �2858.
4. My vehicle is still under LR extended warrant (less than 100,000) no probs with servicing (but they do insist I lock car to petrol) only service petrol side and will only honour warranty claims that are reproducible on petrol and exclude cylinder head.

jime wrote:

Have to say this seems to be a mixture of fact and "local dealers interpretation of warranty rules".
1. You can fit LPG to a diesel, however this system effectively replaces 10-20% of the diesel so is never going to be cost effective.
2. My admittedly last of the P38 v8 4.o was converted to the STAG system lpg for some �1400. some 8 months ago. Because Stag use all the original engine sensors etc. no probs at all.
Proffautogas of S wales do a "same day service" admitedly you have to arrive at 0700 and car is not ready until 1900 hrs - but they give you a loan car.
3. think maths may be wrong (admittedly using my average MPG around town)
20000 divided by 12 (mpg) = 1666
1666 x 4.5 = 7580 (litres)
7580 x �1.25 (unleaded) = �9475 cost of petrol
7580 x �0.71 (dearest lpg) �5381 cost of lpg
Savings = �4094 per annum.
Even using 17mpg as a base figure (my "on a run" mpg) the saving per annum is still �2858.
4. My vehicle is still under LR extended warrant (less than 100,000) no probs with servicing (but they do insist I lock car to petrol) only service petrol side and will only honour warranty claims that are reproducible on petrol and exclude cylinder head.

71p we should be so lucky. 81p at my local shell garage  Ian

jime wrote:

Have to say this seems to be a mixture of fact and "local dealers interpretation of warranty rules".
1. You can fit LPG to a diesel, however this system effectively replaces 10-20% of the diesel so is never going to be cost effective.
2. My admittedly last of the P38 v8 4.o was converted to the STAG system lpg for some �1400. some 8 months ago. Because Stag use all the original engine sensors etc. no probs at all.
Proffautogas of S wales do a "same day service" admitedly you have to arrive at 0700 and car is not ready until 1900 hrs - but they give you a loan car.
3. think maths may be wrong (admittedly using my average MPG around town)
20000 divided by 12 (mpg) = 1666
1666 x 4.5 = 7580 (litres)
7580 x �1.25 (unleaded) = �9475 cost of petrol
7580 x �0.71 (dearest lpg) �5381 cost of lpg
Savings = �4094 per annum.
Even using 17mpg as a base figure (my "on a run" mpg) the saving per annum is still �2858.
4. My vehicle is still under LR extended warrant (less than 100,000) no probs with servicing (but they do insist I lock car to petrol) only service petrol side and will only honour warranty claims that are reproducible on petrol and exclude cylinder head.

Agree with the above - Proffess Autogas are good guys and the saving is a no brainer! 

delsilencio wrote:

No problems with the BMW 4.4 engine(with or without flash lube) because it has hardened valve seats. Later Jag engine hasn't and so the valves will engrave the seats and that will force trouble (even with or without flash lube).