Ingersoll lawn and garden tractors Tractors Model Engine displacement Power output Years 4016 709 cc (43.3 cu-in) 480 cc (29.3 cu-in) 16.0 HP (11.9 kW) 1989-2004 4020 781 cc (47.7 cu-in) 20.0 HP (14.9 kW) 1989-2004