FYI here is a video of an M850i racing a Camaro SS 1LE
50-150, pretty much even.
Car and Driver times for the Camaro SS
Zero to 60 mph: 3.9 sec
Zero to 100 mph: 8.8 sec
Zero to 130 mph: 15.4 sec
Rolling start, 5–60 mph: 4.2 sec
Top gear, 30–50 mph: 2.3 sec
Top gear, 50–70 mph: 2.6 sec
Standing ¼-mile: 12.2 sec @ 118 mph
Making the "speed" of the M850i/M550i even more confusing now.