million dollar question! the issue with the M850i is that there is a huge variance in how fast it really is - i've seen trap speeds range between 116 and 123 mph, 7 mph is a huge diff! I think 118/119 trap with around an 11.6/11.7 e.t. is what the car will hit.
with that said, please see C/D comparison between the N63TU2 and N63TU3 750i xDrive.
C/D TEST RESULTS:
Zero to 60 mph: 4.4 sec
Zero to 100 mph: 10.1 sec
Zero to 150 mph: 25.3 sec
Rolling start, 5-60 mph: 5.2 sec
Top gear, 30-50 mph: 2.7 sec
Top gear, 50-70 mph: 3.4 sec
Standing ¼-mile: 12.8 sec @ 112 mph
2020 Model
C/D TEST RESULTS
Zero to 60 mph: 4.0 sec
Zero to 100 mph: 9.6 sec
Zero to 120 mph: 14.0 sec
Rolling start, 5–60 mph: 5.2 sec
Top gear, 30–50 mph: 2.7 sec
Top gear, 50–70 mph: 3.2 sec
Standing ¼-mile: 12.5 sec @ 113 mph
So while a different car, the difference in speed the engine makes should be taken into consideration. I believe the 0-60 is significantly quicker because of the shorter 1-3 gears similar to the M850i.
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