A.L.F.A. 40/60 GP
 A.L.F.A. 40/60 GP or GP (Grand Prix) was a fully working early racing car prototype made by the company now called Alfa Romeo. Only one example was built in 1914 which was later modified in 1921. This was creation of Giuseppe Merosi and was first Alfa Romeo DOHC engine. It had also four valves per cylinder 90 degree valve angle and twin spark ignition. Usually Alfa Romeo DOHC engines are thought to be Vittorio Jano's creations but the first one was Merosi's GP car.