Originally Posted by Garissimo
It's a better indicator of power-to-weight ratio as both cars are geared to top out well above 150 mph. It also takes most of the effects of traction out of the equation.
See above. The GTR is much better at putting down its power at lower speeds. Here's more evidence that the M6 is faster in a rolling race.
The 100 -150 mph split takes 10.6 seconds in the 2013 GTR
The 100 -150 mph split takes 9.3 seconds in the 2013 M6.
So as speeds increase, the edge actually goes to the M6.
No replacement for displacement. The V8 TT has something to do with that advantage on the top gear end.