I would say 38-45 mpg all day long depending on how they are driven.
I averaged 44mpg driving around in an A6 allroad for a week recently and my A7 3.0 Tdi is averaging 40-44 even though my driving is a little more enthusiastic!

i sold my BMW 120d and got a Legacy LPG - it was the best thing I've done for ages. I had everything (toys) and the performance (242bhp) not to forget the practicality of an estate and the bullet-proof engine.....for the same MPG as the 120d + a little more for insurance.

But, I am a car-hopper (change of scenario) so have decided on an A8 - and judging from the forum here, It should be even better than legacy!

Again I could be wrong (figures from Parkers).
I weigh with buying a diesel or petrol_lpg, and parkers came back with something like 28-33 for diesel and 23 for petrol (4.2 quattro auto D2)

If I go for LPG, then the petrol would be doing abt 40mpg.

have I got this wrong, or are we talking abt modern diesels which are way out of my price bracket?

just to update the Rs6 wheels will now be sold, and if the car has not sold by the 10th then its going else where

Guy if the px guy has offered near £3k, I would de spec it and sell it, that is a great price. +++

yea i contacted him and told him i will de spec it and they will give me £2,500 for it De speced so wheels will go, maybe i will take the mirrors off as they are oem and worth i would say £250 at least not sure about the grill as i only have the top grill to put back on but i have all the spares so i could always sell the A8 grill and all the A8 parts i have floating around +++

Good news then Guy I hope you get your hands on that W12 soon as mate. +++

After hearing of a concern about the photo i posted earlier in this post, i would just like to say i was only making a point and no A8's were harmed in the making of it. :D

haha yes i have already began the reg transfer and im picking it up on saterday the 10th whoo hooo cant sleep any more i was up at 5am its like being five years old on christmas eve

oh amar you asked for the spec

Sports suspention
Sports seats
Flappy paddles
heated nappa leather front and back
heated steering wheel
electric blinds
full audi service
19"RS6 wheels
bose of course
heated windscreen
finger print scanner
keyless push button start/entry
quad zone climate control
mmi
and a few other things i forgot them all
oh yea a 6.0L powerplant !!!+++

Car has sold privately now for £2400 with wheels,ect he is picking it up next week +++ was happy to sell it to someone that was going to enjoy it and look out for a new member to the forum that will be joining with my old D2

Good news on the sale. If he/she is not already a member, point them our way. +++