 20/30 HP had 4250 cc sidevalve straight-4 engine and it produced 67 bhp.The car was meant for the upper classes so the price was high, around three times more than Ford Model T, which was a lot of money immediately after World War I.

ES Sport was based on the 1914 20/30 E model.The "S" was added to emphasize the sportiness of the car.