The ALFA 15 HP was a car produced by Alfa (who later became Alfa Romeo) between 1911 and 1913.
The model was derived from the 12 HP and was fitted with a 4-cylinders 2413 cc engine. The compression ratio was 4.2:1, while the power output of the engine was a maximum of 25 hp at 2400 rpm.
The 15 HP had a four-speed gearbox and was equipped with the parking brake. The speed maximum reached by the vehicle was 95 km/h.
The cars had a total length of 3780 mm, a width of 1400 mm and a weight of 920 kg.
Only 100 cars were built.