The Porsche 906 or Carrera 6 is a street-legal racing car from Porsche. It was announced in January 1966 and 50 examples were subsequently produced, thus meeting the homologation requirements of the FIA's new Group 4 Sports Car category to the number. The type would also compete in modified form in the Group 6 Sports Prototype class.
Porsche 906 at the Nürburgring 1966, Driver: Jo Siffert
Porsche 906 (906-120), rear view
Group 4 referred to regulations for sportscars and grand touring (GT) cars used in racing and rallying, as regulated by the FIA. The group was introduced in 1954 and was replaced by Group B for the 1982 season.
A Ford GT40 contesting the Group 4 Sports Car category at the 1969 1000 km Nürburgring
A Group 4 Porsche 906
A Group 4 Alpine A110 1800
A Group 4 De Tomaso Pantera GTS