De Dion-Bouton Type AD

The Type AD was a four-cylinder De Dion-Bouton car introduced in 1904. Its engine displaced 2,545 cc and was rated at 15 CV, about 11 kW, making it the company's step up from the twin-cylinder Type S of the year before. It sat beside the 24 CV Type AI at the top of the range, and by this period the cars were growing more conventional in their layout, with the radiator moving in front of the engine and the clutch changing from a hand lever to a pedal, as the company approached the peak of its output as one of the largest car makers in the world.