Vehicle & Technical > Discovery

3.9 V8 LPG

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LANDYTIM:
What can I expect to get MPG wise from a 3.9 V8 Discovery.

She is also fitted with LPG, what would be the rough MPG running on LPG?

Thanks in advance (Even though I will be horrified, oh well its a landy!!)

Tim.

mentalmoshio sophs V8i:
around 125 on stock disco on 52litres combined

Range Rover Blues:
It depends and awful lot on the condition of the engine, especially the valve timing.

A good one will better 15mpg on petrol, just ask Johnny Boaterboy!  on lpg you will either loose power or economy, or a combination of the two.

Our 3.9 (Blue) does about 12.5 on LPG but is noticeably less powerful, it's an old draw-through single point system with no feedback.  It helps to have an ignition advance processor fitted but ultimately I have to switch back to petrol for top power.

My LSE runs a bells and whistles multipoint, I notice no loss of power on LPG at all.  On a bad day it will do 9.5 MPG, however you drive it.  With care it will do 12.8mpg, it's decated with a sports pipe, K&N and Iridium plugs.  It needs camshaft, oh and it's a 5.0TVR V8 :twisted:

So the answer in short is "less than 20".

mentalmoshio sophs V8i:
 :drool: :drool: 5l tvr v8  :drool: :drool:

hairyasswelder:

--- Quote from: david p on October 20, 2008, 20:10:50 --- :drool: :drool: 5l tvr v8  :drool: :drool:

--- End quote ---

AND it its a wolf in sheeps clothing  ;)

Sounds  :drool: :drool: :drool: too  ;)

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