A motor vehicle has two steerable righthand and lefthand front wheels and two steerable righthand and lefthand rear wheels, a front wheel steering device for steering the front wheels according to the angle through which a steering wheel is turned, a rear wheel steering device for steering the rear wheels, an actuator for actuating said rear wheel steering device, and a control device for controlling the operation of the actuator to steer the rear wheels in a direction which is selectively the same as or opposite to the direction in which the front wheels are turned. The steering of the rear wheels is controlled by determining the speeds of rotation of the four front and rear wheels with respect to the ground, and controlling the operation of the actuator with the control device so that any difference between the speeds of rotation of the front and rear wheels with respect to the ground will be reduced substantially to zero.