The suspension comprises an arm fast to a hub mounted on the body of the vehicle by means of a transverse rotary bearing, the hub being anchored to the end of a transverse torsion bar arranged in a tubular transverse member. The suspension comprises elastic means with variable flexibility arranged between the body and at least one arm fast in rotation to the tubular transverse member, the elastic means exerting on the arm an effect tending to oppose oscillating movement of the wheel upwardly with respect to the body. The suspension is particularly useful as a rear suspension for a light vehicle with front wheel drive.