As for the M6 3.73 vs tuned A6 from a 80 roll to 115.
I say it would be close since the auto will have to downshift, and the manual can stay in 4th for practically the whole race with a shift to fifth at the very end
The auto would be in 3rd gear from 80-115 (compared to 4th-5th in the 3.73 manual) and doesnt need to downshift since you can manually put it in 1st-3rd from any speed even from a stop without downshifting and start from there.
I know you should use the butt dyno but the auto feels much better than the 3.73 geared manual at these speeds or really anywhere above 60. Could be because you're in 3rd instead of 4th going from 60-115...
Even if I started with dowshifting I bet I'd pull:shiny: