4.3 owners - mpg?

[Zippee]

Just wandering what other Power 4.3 owners are seeing mpg wise? Prior to my rebuild as a 3.6 I'd see 22-24 for a mix of hoon and easy.
Now I barely see 18mpg taking it easy, dropping to 15 when pressing on which is a PITA with such a small fuel tank, refills are now every 150 miles rather than 180-200. Happy if this is normal but obviously it is a drop of about 25% and not exactly cheap in this day and age, especially if it should be higher.

[collingbroon]

I can't say I have noticed much difference to be honest. Not actually worked it out but, driving from Coventry to Aberdeen which Iv done a few times now, I only use about £80 each way, around 500 miles each way. About a tank and a 1/4-1/2 max.

[sidpinup]

On a run without pressing on too much I think it's more or less the same as the 3.6 maybe slightly less. I am guessing 28mpg. Spirited driving a lot less. I drove quite quickly for about 140miles at the weekend and used a whole tank.

I was grinning like an idiot tho

[D14 AYS]

If driving moderately sensibly I can get 200 miles out of a tank full (4.5) If pressing on a bit considerably less!

[Zippee]

Sounds like mines quite down then - I think I'll give Dom a call and see if he has any ideas in the first instance.

[piquet]

i has a power 4.3 tuscan and only got the same kind of mileage you are, but i bought it as a 4.3 so didn't see the change and just assumed it was normal

maybe part of the 4.3 remap has them running rich to prevent pinking

[Getsis]

I can get 21mpg from the 4.5 when it's on economy map (Syvecs). When set on normal I get at best 18 mpg. The best I ever got when it was a 3.6 was 24mpg

[black11s]

I've been watching mine for ages, (its often a sign of something being wrong with an engine when mpg drops - sometimes its easier to spot than a drop in power, because you're rarely using maximum attack on the road).

Mine is a standard 3.6.
On a long motorway journey, around the legal maximum I have once seen 28mpg, however, its normally around 24-26.
For town driving, it is between 15 and 19 depending on the state of the traffic.

This equates to around 160 miles to a tank around town, and a maximum of 260 miles of motorway driving.

Liek the rest of you, I think its a PITA having to stop so often, especially with the stupid filler on the T350...

Interestingly, Don1 with his RG, FFF, Syvecs, etc has said on another post that he's getting low to mid 30's mpg now. Likewise the RG demonstrator is normally seeing over 300 miles to a tank on longish journeys - but bear in mind that gets driven by people who want to see how fast it is too.
Don, if you're reading, can you confirm any more details on real world driving?

I'm planning a rebuild for a bit more oomph soon, but the thought of spending even more time and money in petrol stations doesn't exactly motivate me...

[sidpinup]

There is room in the boot of the Tam for a bigger/tall fuel tank. May be an option?

[combine]

I reckon its impossible to drive a Tvr modestly !

[Don1]

black11s said:

Interestingly, Don1 with his RG, FFF, Syvecs, etc has said on another post that he's getting low to mid 30's mpg now. Likewise the RG demonstrator is normally seeing over 300 miles to a tank on longish journeys - but bear in mind that gets driven by people who want to see how fast it is too.
Don, if you're reading, can you confirm any more details on real world driving?

I normally don't look at that kind of thing, but during the summer a few spirited drives, a rush-hour motorway trip (M25), some pottering around (shopping, dropping son off etc) yielded around a 24.5 figure. No idea what it would be if I was trying to save hydrocarbons...

(Sorry Zippee for the thread tangent!)

[Overseas]

STR8Six 4.3 sag, Aberdeen to Hexham on full tank, approx 223 miles, 50 litres.

[collingbroon]

I also remember doing a 180 mile round trip including spending the whole afternoon drag racing on one tank.

[julianc]

Can't say I've ever been bothered with mpg - only gpm (grins per mile)

[Buzz Billsberry]

combine said:

I reckon its impossible to drive a Tvr modestly !

Correct response!

Buzz