Torque Vectoring

It can be done mechanically with special differentials or by braking the inner wheel. Electric cars with two motors on one axle can control each wheel directly. It reduces understeer. Systems are found in performance models and some all-wheel-drive SUVs. Mechanical systems use clutches in the rear differential to overdrive the outer wheel. Brake-based versions are cheaper and are found in many ordinary cars under various brand names.

More torque to the outer wheel creates a yaw moment that turns the car.

Brake-based systems put extra load on brakes. It cannot overcome the physical grip limit.