1972 classic v8,lpg or 200tdi conversion?how economical?

[DAVE V8]

hi,just bought a 72 classic ,believe it to be ex police,any websites i can try to check it out? (grommets on roof loads of red/blue swicthes on dash and odd front grill with pair of spots,it needs a bit of work to get back into use ,trouble is the v8 engine runs very well,(the heart says keep v8,but bank manager and wallet says different,lol.) i have a 200tdi disco and am considering fitting the engine and box...at first i thought i was going to fit 200tdi in it,but the old thing deserves to keep its real engine ,so can anyone tell me rough fuel figures for v8 ,4 speed carb engine/200tdi engine ,5 speed/and figures for lpg on v8 carb..any tips appreciated..cheers dave

[Range Rover Blues]

300 TDi, manual, slightly tweaked, around 27MPG carefully.

300 TDi auto, 30mpg (21 mpg towing)

3.9 V8 EFi on single point LPG, 10-12mpg on LPG

5.0 V8 EFi on multi-point 9-12.5 mpg on LPG.  Fit a sport exhaust, decnet plugs etc, it makes a difference.  The V8 responds to tuning/servicing well, the first sign of cam wear is excessive fuel consumption, so worth fitting a new cam chain at the very least (A fellow member got around 18MPG out of his 3.9 after replacing the cam and chain).

Depends how you drive it and the condition of the engine, but I reckone there's little difference between a V8 on gas and a TDi, other than finding a gas pump.

BTW, 200/300 TDi are similar on fuel

[martyn]

just got rid of my 2,5 disco auto 22/23 to gallon looking to get 4,0 petrol more fun and petrol is now 8pence a litre cheaper than diesel  around here so it depends on how much mileage you are going to do my next one will be for fun only so it doesnt matter tooooo much well thats what ive convinced myself

[DAVE V8]

top man,ive decided its lasted this long as a v8 it deserves to carry on as intended and theres just something about the v8 rumble,im going to run it v8 and possibly try and get lpg later?,but like you ive convinced myself petrols cheaper than diesel and i wont be doing too many miles.lol...

[tack43]

3.9 EFi auto with open loop lpg  14 mpg pottering about and 18 on a run albeit I tend to have a light foot. I'm paying 65.9p a litre for LPG so works out a lot cheaper than a diesel auto. 

Rich

[Range Rover Red]

How much cheaper?  I'd be interested to know.

300 TDi auto, 30mpg (21 mpg towing)

I think this refers to my truck - before that I had a 3.9 V8 auto with multipoint LPG which generally did about 12 mpg on gas.

Depends how you drive it and the condition of the engine, but I reckone there's little difference between a V8 on gas and a TDi, other than finding a gas pump.

I'm inclined to agree with RRB, though I must admit, I never really sat down and did any detailed maths - I paid

[tack43]

LPG @ 65.9p per litre works out to about

[Range Rover Blues]

We've just ben away with the TDi, a 300 Manual RRC, the caravan weighs 2 tonnes.

120 miles each way plus some tooling about without the 'van on.  500 miles (plus change) on a tank,

[tack43]

I still have a full size boot and spare wheel too  I replaced the petrol tank with an 80 litre LPG tank and 30 Litre side mounted petrol tank. Range is 160-180 miles on LPG just use petol for starting and stopping.
Around here LPG varies by about 25p per litre. I was lucky to find my supplier as they are not on any internet lists or advertising bar a sign outside. The hidden away places seem to be much cheaper than forecourts. Local taxi drivers know where they are! 

Rich

[DAVE V8]

as the early/even all 2 doors are starting to get a bit thin on the ground now,been looking and hoping  to try and keep it fairly originalish !!! (apart from lift,wheels,tyres winch,sensible mods ?? etc,etc.lol)so hoping v8s the way as i intend to keep forever,that v8 burble, grin and useable mpg ,hopefully a mate thinks hes sorted me out a complete lpg set up off a disco (someone he knows gonna be using an early rusty disco v8 purerly for play days so he wont need lpg) ....so lpg looks like it may be the way forward for some affordable fun motoring..

[Range Rover Ron]

Hello MC'ers,

My 200 tdi when it was new got 29.9 towing my 5 berth caravan all the way to the South of France.
the 200 tdi is the most economical of the later engines by far, did not do an exact log as I did on the Freench trip but I rekon I was getting around 33mpg around town (solo) and over 35 mpg on a run (under 65mph)

If you dont need to get a LR engine, e.g. for LR club scruitinised events etc. then I'd suggest you get a Isuzu turbo 2.8.
Far superior to anything of that age from Solihull and matches the RRC perfectly.

Ron.