I've found Torque fairly reliable. I did a lot of test in a Jaguar Super V8 and consistently got 0-100 mph in 11.7 secs, which agreed with what I would expect. Perhaps I am subconsciously comparing the A8 with that.
I have VCDS as well, so I should do a comparative measurement with that, but I do think the figures are accurate on a seat of the pants feeling. It certainly feels slower than my old D2 S8s, but on paper they are not that much different.
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