Motortrend or Road and Track in their video for 0 to 60 test for the 335i revved the engine to 2000 RPM for maximum acceleration (I think they did 4.7 seconds for the 335i). With all wheel drive you should be able to do the same to probably 3500 to 4000 RPM for maximum acceleration.
No worries of going sideways, with all 4 wheels getting power you should just hook up and go..........
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