I just now got around to loading the R8 tune into my '09 A7. However, so far I have only driven it to work this morning and the roads were wet and cold so I have not really got into the throttle. Initial dirving impressions is that the motor throughout the rev range is smoother. Other than that until I can dirve her some more I can't tell much difference. But then again my first tune, the R6 tune, worked well with the exception of a hot start issue and a little bit of tip-in knock when the outside air temps dropped.
As soon as I have put some miles on her with 91 octane (been running 93) I'll report back.
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