EVDRIVER said:
Interestingly the regen capacity of a FWD car is higher with the same motor power capabilities vs RWD. The AWD M3 should have even greater regen capabilities overall and in lower traction situations.
I expect AWD regen to match FWD for the same size motors. That's just physics.
When braking, the center of weight shifts to the front, increasing the friction forces on the front tires, while simultaneously reducing the friction forces on the rear tires. More friction = more torque to spin a motor in regen. The regenerating rear motor won't add anything to the overall regen power, because any regen in the rear pulls the weight-shifting back and thus less is available for the front motors.
This works in reverse for acceleration, as the rear tires can put more power on the road than the front tires. That's why a RWD dodge demon can almost match a P100D (after the engine fully engages).
But AWD is still awesome for EV's. All the regen, and power application, with only a slight cost of an additional motor and weight.