ModelEngine displacementPower output (max.)
1886781 cc (47.7 cu.in.)18.0 HP at 3,600 rpm
HT20880 cc (53.7 cu.in.)20.0 HP at 3,600 rpm
HT23946 cc (57.7 cu.in.)23.0 HP at 3,600 rpm
QS-16588 cc (35.9 cu.in.)16.0 HP at 3,600 rpm