Mud-club

Vehicle & Technical => Discovery => Topic started by: LANDYTIM on October 19, 2008, 12:20:30

Title: 3.9 V8 LPG
Post by: LANDYTIM on October 19, 2008, 12:20:30

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.

Title: Re: 3.9 V8 LPG
Post by: mentalmoshio sophs V8i on October 19, 2008, 19:31:30

around 125 on stock disco on 52litres combined

Title: Re: 3.9 V8 LPG
Post by: Range Rover Blues on October 19, 2008, 20:34:05

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".

Title: Re: 3.9 V8 LPG
Post by: mentalmoshio sophs V8i on October 20, 2008, 20:10:50

 :drool: :drool: 5l tvr v8  :drool: :drool:

Title: Re: 3.9 V8 LPG
Post by: hairyasswelder on October 20, 2008, 20:51:16

Quote from: david p on October 20, 2008, 20:10:50

:drool: :drool: 5l tvr v8  :drool: :drool:

AND it its a wolf in sheeps clothing  ;)

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