Let's say we have two identical cars (power, weight, drag etc.), the only difference being in the torque split between the front and rear wheels. One has a 50:50 split while the other has a 40:60 split torque distribution. Is symmetrical AWD more efficient at acceleration during high speed driving? The way I see it is the 50:50 car covers ground equally at all 4 corners while the 40:60 car would have the rear wheels spin faster than the front wheels if the car was on a hoist. On the road, the 40:60 car would have both axles spin at the same rate, but 60% of the torque is sent to the rear, so does that mean the torque sent to the front is wasted energy since the rear wheels are propelling the car's front wheels faster than the engine can spin it? Or did I understand it incorrectly and the car's front and rear axles spin at the same rate despite having a 40:60 front:rear torque split?