Originally Posted by JK42
Actually they are not. In real life roto dynotests current BMWs lose between 4-8%. See www.rri.se
. 130i loses 4% torque and 8% power, 335i Coupé loses 4% of torque and 6% of power. Hope this helps. (HTH.)
I took a look at that website. Very interesting, lots of good information. However, with that being said. You're misinterpreting the data. Your statement is that the 335 has a drivetrain loss of 4% tq and 6% power. That is incorrect. On that website it is properly stated that 4% and 6% represent the discrepancy between stated engine performance and measured powertrain performance. The correct interpretation of the data is that the 335's hp & tq are underrated by BMW.
edit: Here's what I'm talking about...