Porsche 906

The Porsche 906, sold as Carrera 6, with a 2-litre flat six-cylinder Type 901 engine compared to the F4 in its predecessor Porsche 904 Carrera GTS, is a Group 4 Sports Car from Porsche announced in January 1966 for the 1966 World Sportscar Championship. The street-legal racing car met homologation requirements of the FIA like space for luggage and carrying a spare wheel (as did the Porsche 917 in 1969). When the required minimum number of at the time 50 cars was produced, of 65 in total, homologation came into effect in May 1966.

In earlier races, the already numerous 906 had to be entered in the Group 6 Sports Prototype class. Later, the factory also entered modified 906 as prototypes, especially as lightweight hillclimbing spyder, with current Formula 1 suspension parts and wheels, eight cylinder engine, or long tail for Le Mans. Already by August 1966, new prototype class chassis were called Porsche 910.

Together with results of the 904, the 910 and even the 911, the 906 won all 2 litre classes of the 1966 World Sportscar Championship and the 1966 European Hill Climb Championship. Competition from the comparable Ferrari Dino 206S, also intended as Gr.4 sportscar as indicated by the S, materialized only in the Gr. 6 prototype classes as Ferrari built only 18. Privateers in 906 helped Porsche win also the 1967 World Sportscar Championship 2 litre sportscar class which was discontinued in 1968.