Originally Posted by bmwzimmer
T-Bone, you have no links or dyno statistics (more than 1 dyno) to back up your claim that the M5 has an ungodly 7% drivetrain loss. I've posted a link showing 10 M5 Dynos all ranging from 390-435hp. Where the heck are your dyno charts showing 460+hp @ the wheels? You have nothing to back up your statement.
You have the best data available the 335i / M5 / RS5 run on the same dyno. 335i showing 6%, M5 7% and RS4 17%. As I wrote, forgetting the absolute values, please try to explain what there is only 1% difference between drivetrain losses on the 335i and M5?