Hi Tommy
Thanks for your reply, I own another Audi that I drive regularly, it's an A5 3.0 TDI Quattro with 300 bhp, it's a 6 speed manual and it averages around 40 mpg and that includes a lot of high speeds on the motorway, so you can imagine my disappointment with the A7 only getting 29 mpg and I can't believe that having two turbos can use up all that fuel, it's a diesel and should be far more economical, to make matters worse I think the A5 is a lot quicker, maybe being automatic drinks all that extra diesel.
I've only had the A7 for a couple of weeks and I'm on my second full tank and so far I'm on target to do 460 miles, which will work out at 30 mpg, but that's a far cry from the 40mpg that Audi quote in there blurb.
Maybe I need to have the car looked at as it's only done 13000 miles.