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View Poll Results: p38 4.0 lpg or 2.5 diesel
4.0 lpg 49 53.26%
2.5 diesel 43 46.74%
Voters: 92. You may not vote on this poll

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  #31  
Old 14th-January-2008, 22:05
v8kenny's Avatar
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Default Re: p38 4.0 lpg or 2.5 diesel?

Still an awful long way short of 45 mpg

BTW - what happened to the cowling round the steering wheel, have you just nicked that car ?
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  #32  
Old 15th-January-2008, 06:35
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Default Re: p38 4.0 lpg or 2.5 diesel?

Quote:
Originally Posted by lanmjdun View Post
I didn't believe they were capable of those figures either, but after resetting the trip computer this is my average mpg whilst pootling along at a constant 58mph with cruise control. Yes, that reads 35.3mpg, of course it drops just a bit when you get off the motorway...
Although diesels get about 35mpg, at the end of the day the performance compared to the petrol versions or LPG for that matter, is huge.

I'd rather have a Petrol with an LPG conversion and keep the performance and pay 0.45 pence a litre, than have a diesel and pay 1.00 a litre and get 35mpg.

It's just more fun.
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  #33  
Old 15th-January-2008, 08:32
Dorset VogueSE's Avatar
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Default Re: p38 4.0 lpg or 2.5 diesel?

Quote:
Originally Posted by lanmjdun View Post
I didn't believe they were capable of those figures either, but after resetting the trip computer this is my average mpg whilst pootling along at a constant 58mph with cruise control. Yes, that reads 35.3mpg, of course it drops just a bit when you get off the motorway...

Well if you want to trade fuel economy figures, I did a recent trip to france, where I ran for approx 90 miles along a dual carriageway at a steady 60mph. The fuel computer turned in 22.1mpg.

Now heres the good bit - thats running a 4.6 on LPG (multi point, fully sequential system) at 45.8 pence per litre. Based on the typical 104p for diesel, this means financially I was running at about 50.2mpg.


Now this is a bit extreme as no one drives everywhere at a constant 56, but I averaged 16mpg over nearly 5K miles according to the pooter, so on LPG at approx 50% cost of regular fuel, thats averaging 32 to the gallon. Makes the diesel look positivly BAD.

Poor fuel enconmy AND performance, why even consider it.
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  #34  
Old 15th-January-2008, 10:28
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Default Re: p38 4.0 lpg or 2.5 diesel?

There's no such thing as clean diesel! NO SUCH THING !! The particulates polution alone is acounting for an increase in asthma by about 80% in 10 years.
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  #35  
Old 15th-January-2008, 12:42
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Default Re: p38 4.0 lpg or 2.5 diesel?

Quote:
Originally Posted by Dorset VogueSE View Post
Well if you want to trade fuel economy figures, I did a recent trip to France, where I ran for approx 90 miles along a dual carriageway at a steady 60mph. The fuel computer turned in 22.1mpg.

Now here's the good bit - that's running a 4.6 on LPG (multi point, fully sequential system) at 45.8 pence per litre. Based on the typical 104p for diesel, this means financially I was running at about 50.2mpg.


Now this is a bit extreme as no one drives everywhere at a constant 56, but I averaged 16mpg over nearly 5K miles according to the pooter, so on LPG at approx 50% cost of regular fuel, that's averaging 32 to the gallon. Makes the diesel look positively BAD.

Poor fuel economy AND performance, why even consider it.
Well said that man! I can't believe someone buys a Range Rover which most consider to be the limousine of 4X4's and firstly buy the diesel version and then stick chip fat in it!

If you want a diesel 4X4 and have decent comfort, want good mileage/mpg buy a Land Rover Discovery or a Freelander...that's why they make them. Sticking chip fat in doesn't feel like sacrilege in one of those.....
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  #36  
Old 15th-January-2008, 13:03
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Default Re: p38 4.0 lpg or 2.5 diesel?

I was about to mention running a diesel on vegetable oil as a counter to a V8 with LP, then the economics of a diesel look even better.

I don't have a leg to stand on about the performance difference though!

Isn't LPG used for cooking too?
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  #37  
Old 15th-January-2008, 14:04
Dorset VogueSE's Avatar
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Default Re: p38 4.0 lpg or 2.5 diesel?

Quote:
Originally Posted by lanmjdun View Post
I was about to mention running a diesel on vegetable oil as a counter to a V8 with LP, then the economics of a diesel look even better.

I don't have a leg to stand on about the performance difference though!

Isn't LPG used for cooking too?

Can't see that veg oil is such a cheap option anymore, unless your getting it second hand from the local chippy. Price of that has sky rocketed recently, and of course as law abiding citizens all veg oil drivers are declaring the change of fuel use and paying the appropriate tax on it

I still think even running on asda's cheaest you will still pay more per mile for the privilige of poor performance and excessive noise from the oil burner, compared to the latest LPG systems
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  #38  
Old 15th-January-2008, 15:38
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Default Re: p38 4.0 lpg or 2.5 diesel?

Quote:
Originally Posted by Dorset VogueSE View Post
Can't see that veg oil is such a cheap option anymore, unless your getting it second hand from the local chippy. Price of that has sky rocketed recently, and of course as law abiding citizens all veg oil drivers are declaring the change of fuel use and paying the appropriate tax on it

I still think even running on asda's cheaest you will still pay more per mile for the privilige of poor performance and excessive noise from the oil burner, compared to the latest LPG systems
Pah! Stuff all of those fossil or vegetable fuels, I'm going for either spent Plutonium or a Flux capacitor
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  #39  
Old 16th-January-2008, 22:19
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Default Re: p38 4.0 lpg or 2.5 diesel?

Quote:
Originally Posted by lanmjdun View Post
I didn't believe they were capable of those figures either, but after resetting the trip computer this is my average mpg whilst pootling along at a constant 58mph with cruise control. Yes, that reads 35.3mpg, of course it drops just a bit when you get off the motorway...
The question is, how much do you trust your trip computer?
Have you manually checked your fuel consumption?
Trip computers can tell lies sometimes.........
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  #40  
Old 19th-January-2008, 23:52
lanmjdun's Avatar
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Default Re: p38 4.0 lpg or 2.5 diesel?

I was 'cheating' when I got that reading, going on the flat at 58mph over a mile. I was going down a hill at 60mph the other day and got 46mpg showing - thought if I posted that it would set cat amongst pigeons!

I do trust the trip computer, as I usually reset it on filling the tank and then compare to actual fuel used/mileage covered - it's accurate to the nearest tenth of an mpg. I usually get 23mpg on a tank, mainly because whilst I get 35mpg on the motorway, the crawl in traffic getting out of the town returns only 9.5mpg...

I'm working on improving this, to do list is: change auto box oil + filter; engine oil (5W40 semi-synth) + filter; thermostat (engine temp gauge rarely rises above cold therefore suspect thermostat is stuck open); change viscous fan (causing annoying vibration/buzz at 1500rpm); and lastly clean gunge out of intake/intercooler.

Love Land Rovers, a Toureg would never get you this involved...

p.s. Couldn't help noticing the diesel is in the lead.

Last edited by lanmjdun; 20th-January-2008 at 00:05.
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