LPG - MPG?? Range Rover 4.6 etc...
Discussion
Hi All
Can someone help me out?
What MPG can be expected from a 4.6 Vogue (for example) running on LPG?
I know LPG doesn't deliver the same miles as a gallon of petrol, but don't really know what this works out like for a Range Rover.
considering getting one for my better half and wondering if I could stomach the fuel bills..........
Can someone help me out?
What MPG can be expected from a 4.6 Vogue (for example) running on LPG?
I know LPG doesn't deliver the same miles as a gallon of petrol, but don't really know what this works out like for a Range Rover.
considering getting one for my better half and wondering if I could stomach the fuel bills..........
It's not a straight forward calculation because petrol will be used until the vehicle reaches 50 degrees C , so depends on how many cold starts or short journeys you make.
Roughly the cost of running on LPG is the cost of the normal petrol mpg but priced in diesel, halved i.e. (using round numbers) if you normally get 20mpg on petrol and the cost of diesel is £6 per gallon then the fuel cost on LPG will be equivalent to 40mpg at £6 per gallon.
If it's already been converted to LPG then get the system checked out by professionals before buying - the systems are often incorrectly fitted or just worn out if they haven't been maintained properly.
If you are having the LPG system fitted then be very careful who you select to fit it - avoid the Google route! Speak to owners of vehicles of the same make that they have converted before you selecting!
Best of luck...
Roughly the cost of running on LPG is the cost of the normal petrol mpg but priced in diesel, halved i.e. (using round numbers) if you normally get 20mpg on petrol and the cost of diesel is £6 per gallon then the fuel cost on LPG will be equivalent to 40mpg at £6 per gallon.
If it's already been converted to LPG then get the system checked out by professionals before buying - the systems are often incorrectly fitted or just worn out if they haven't been maintained properly.
If you are having the LPG system fitted then be very careful who you select to fit it - avoid the Google route! Speak to owners of vehicles of the same make that they have converted before you selecting!
Best of luck...
Trellis said:
Thanks for all your comments guys - given the amount of stop / start, round town driving she does, I doubt LPG is going to be as sensible as a diesel!
If you're just doing stop / start around town, does this mean it will be doing low mileage?If so, you will get much more car for your money with a straightforward petrol car than a diesel. I don't understand this obsession we have with mpg in the UK: Unless you are doing 20-30,000 miles per year, just spend £2,000 less on the car (e.g. buying a petrol rather than a diesel) and enjoy the performance, refinement, and all the toys (petrol versions are nearly always higher spec cars).
I ran a Supercharged RRS for a while - paid £5,000 less than the cheapest TDV8 available at the time - that's a shed load of V-Power! Worth every penny for the grin factor alone.
Edited by kVA on Saturday 2nd January 19:53
Trellis said:
I doubt LPG is going to be as sensible as a diesel!
Depends if you buy one already converted or not. Given that (when i was buying, at least) there doesn't seem to be a premium to pay for buying an LPG converted car, it made perfect sense to run LPG.Don't expect the diesel to be a paragon of economy though. From what i've read, both P38 and L322 diesels will deliver barely 20mpg round town.
kVA said:
Trellis said:
Thanks for all your comments guys - given the amount of stop / start, round town driving she does, I doubt LPG is going to be as sensible as a diesel!
If you're just doing stop / start around town, does this mean it will be doing low mileage?If so, you will get much more car for your money with a straightforward petrol car than a diesel. I don't understand this obsession we have with mpg in the UK: Unless you are doing 20-30,000 miles per year, just spend £2,000 less on the car (e.g. buying a petrol rather than a diesel) and enjoy the performance, refinement, and all the toys (petrol versions are nearly always higher spec cars).
I ran a Supercharged RRS for a while - paid £5,000 less than the cheapest TDV8 available at the time - that's a shed load of V-Power! Worth every penny for the grin factor alone.
Edited by kVA on Saturday 2nd January 19:53
1. Compare the cost of depreciation over the period of ownership/miles NOT just the purchase price for the diesel/petrol. Then add in the cost of fuel at diesel/petrol prices and their relative MPG.
2. If you're not doing 20k+ miles per year then stay away from LPG unless its already been fitted (and have it checked out professionally before buying) otherwise the cost saving of fitting LPG will not be sufficient.
3. By the time you finished (1) and (2) the maths still won't add up so go out and buy what you want and enjoy a brilliant vehicle for a few years!
Phil. said:
1. Compare the cost of depreciation over the period of ownership/miles NOT just the purchase price for the diesel/petrol. Then add in the cost of fuel at diesel/petrol prices and their relative MPG.
I agree if you are talking about new cars, but as soon as any car is a couple of years old the rate of depreciation between petrol and diesel is almost identical - and you get a better car for the same money with a petrol.Personally, I wouldn't buy an LPG car anyway... You can't take it on Eurotunnel (which I use regularly) and this...
kVA said:
Personally, I wouldn't buy an LPG car anyway... You can't take it on Eurotunnel (which I use regularly) and this...
As I have said above - if you buy a vehicle fitted with LPG then get it checked by a professional. But what does your photographic evidence of a LR on fire have to do with LPG? What facts do you have to support your LPG scaremongering?
Phil. said:
As I have said above - if you buy a vehicle fitted with LPG then get it checked by a professional.
This is the problem with LPG. People fit it or buy something with it fitted, ignore it for tens of thousands of miles and are then surprised when it goes wrong/explodes. An equally neglected petrol system will have the same amount of problems, except it won't because that's covered by the MOT.Phil. said:
kVA said:
Personally, I wouldn't buy an LPG car anyway... You can't take it on Eurotunnel (which I use regularly) and this...
As I have said above - if you buy a vehicle fitted with LPG then get it checked by a professional. But what does your photographic evidence of a LR on fire have to do with LPG? What facts do you have to support your LPG scaremongering?
Here's some more people that weren't too pleased about LPG cars that day either...
Quinny said:
kVA said:
The fact that I sat for 2.5 hours on the M40 on a Bank Holiday waiting for the fire crew to declare that there was no longer an explosion risk from the LPG tank in the Range Rover concerned!
Here's some more people that weren't too pleased about LPG cars that day either...
What a load of bHere's some more people that weren't too pleased about LPG cars that day either...
ks.... LPG Fires in converted cars are far rarer than petrol fires in non converted
f
k me, a few years ago you couldn't travel on any motorway wiyhout seeing a bloody wagon on fire, or the remains of one.....Flammable stuff that Diesel Unfortunately I was the first vehicle to be stopped when they closed it, so naturally, I asked why...Just one question - if it wasn't an explosion risk, why do you think they closed BOTH lanes of the Motorway until the wreck had cooled down?
kVA said:
The fact that I sat for 2.5 hours on the M40 on a Bank Holiday waiting for the fire crew to declare that there was no longer an explosion risk from the LPG tank in the Range Rover concerned!
Here's some more people that weren't too pleased about LPG cars that day either...
So it was a one off you happend to witness. Was it the petrol or the LPG that caused the fire? If the LPG had been the cause the LPG tank would not have been a concern for the fire crew it would have blown up! It was obviously a petrol fire and how many do we see of those each day? It seems that the LPG tank didn't go up despite the fire which is plus rather than a negative for the safety of LPG. Here's some more people that weren't too pleased about LPG cars that day either...
Why the need to scaremonger? Facts please rather than complete twaddle.
Quinny said:
kVA said:
Just one question - if it wasn't an explosion risk, why do you think they closed BOTH lanes of the Motorway until the wreck had cooled down?
I've no idea.... Perhaps you should have told the fire chief that the risk of an explosion from an LPG fire is far lower than that of a petrol fire.....If you knew what you were on about, perhaps you could have saved all that hanging around
What about fire risks?
An LPG system already addresses most fire risks by ensuring that no fuel can escape, preventing it from making any impact induced fire more severe.
But there is another problem to consider. What if the vehicle is burning so badly that the fuel tank is heated by the flames?
Again, a metal Petrol or Diesel tank affords little protection here, and a plastic tank will actually melt. Only moderate amounts of heating from the outside will result in a catastrophic explosion, spreading burning liquid fuel all around the scene. (Pound for pound, liquid Petrol has an explosive potential approaching that of Dynamite.)
An LPG tank, however, is designed to slowly release its contents via a safety valve (much the same as those fitted to compressor tanks or steam engine boilers). If the pressure within the tank becomes greater than a preset level, the valve will 'blow off'. The preset level is much less than the pressure that would cause the tank to explode. Admittedly, the venting of gas will probably result in a jet of flame, but at least some control of its direction is afforded and an explosion is avoided.
Conclusion
Considering all of the factors above, an LPG fuel system is quite a lot safer than most Petrol or Diesel systems.
Edited by Phil. on Saturday 2nd January 23:57
Excuse me, but I just expressed a personal opinion that I wouldn't buy an LPG car of any description...
As for telling a Fire Chief his job (when they clearly considered the risk sufficiently serious to close both lanes of the M40 for over 2 hours and call 5 fire tenders to an incident involving just one vehicle) are you having a laugh?
The OP is clearly trying to make a decision about LPG and I posted some information that I would want to be aware of if I was making the decision.
In particular, if the risk is really so low, why are all LPG vehicles banned from Eurotunnel?
In my experience, people who become abusive and personal, when defending their own choices, usually have some doubts themselves. Your choice, but I wouldn't sit my dogs next to an LPG tank, let alone kids.
As for telling a Fire Chief his job (when they clearly considered the risk sufficiently serious to close both lanes of the M40 for over 2 hours and call 5 fire tenders to an incident involving just one vehicle) are you having a laugh?
The OP is clearly trying to make a decision about LPG and I posted some information that I would want to be aware of if I was making the decision.
In particular, if the risk is really so low, why are all LPG vehicles banned from Eurotunnel?
In my experience, people who become abusive and personal, when defending their own choices, usually have some doubts themselves. Your choice, but I wouldn't sit my dogs next to an LPG tank, let alone kids.
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