The car had a four-cylinder engine with overhead valves. The engine, with a single SU carburettor and with a displacement of 1496 cm³, delivered 50 bhp (37 kW) at 4500 rpm. The engine was essentially the same as the 12/50 TH model from 1927 and the 12/50 SD from 1927 to 1929. This made it cheap to manufacture and the model fitted into the 1.5-liter class which was popular at that time.