Vehicle with movable spoilers

A vehicle with movable spoilers, the vehicle having at least one spoiler movable between a minimum-angle position producing a minimum increase in vertical load, and a maximum-angle position producing a maximum increase in vertical load; and a spoiler actuating device for adjusting the position of the spoiler between the minimum-angle position and maximum-angle position as a function of the speed of the vehicle; the spoiler actuating device providing, up to a given maximum speed, for adjusting the position of the spoiler to increase the vertical load as speed increases, and for maintaining the vertical load at a substantially constant given value as long as the speed of the vehicle exceeds the maximum speed.