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Originally Posted by Blackraven
^^^
Could AWD have a positive effect in this case?
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It does. The way the AWD system operates also has an effect. Just using the known published figures used to roughly calculate it comes out to an unrealistic figure (10.98@131.4mph - vehicle mass, mass distribution, power distribution, and gearing).
Adding in the frontal area, coefficient of drag, resistance from the tires, and drivetrain loss, brings the calculation down to 3.31 0-60, 3.55 0-62mph, 11.58@125.2mph, top speed drag limited of 212.4mph. It's limited electronically for top speed (the M760i and B7 rely on ground effect) as they are very loose at high speed and rely on DSC to keep things under control. The B7 of will trap approx the same time but with a lower velocity. The ability to reduce drivetrain loss at speed is one of their tricks.