Group CN is a category of motorsport, introduced by the FIA in the early nineties for sports car racing.[citation needed] Group CN cars are mainly seen in hillclimbing championships or sports racing series. Group CM is a non-FIA class which is closely related to Group CN.

Major racing seriesEdit

Group CN rules are applied to a variety of championships. Many championships alter the rules in their own way like the Radical European Masters and V de V championships.

Radical European MastersEdit

The Radical European Masters is a spec racing series in Europe. It features the Radical SR8, Radical RXC Spyder and Radical SR3, each in their own class.

V de VEdit

The French-based V de V organisation features two FFSA Group CN based classes. The endurance championship is open for any chassis and engine within the regulations. The V de V organisation also features the Funyo Challenge open to Peugeot powered Funyo 4 or Funyo 5.

National championshipsEdit

A Group CN racing class exists in many countries, many of which utilize radicals. Examples are the Radical UK Cup which features the Radical SR3 and the Open España Prototipos.

FIA Group CN technical regulationsEdit

Engine Maximum of 6 cylinders and

3000cc, homologated by the FIA in Group N.

Drivetrain Free, with a maximum of 6

forward ratios. Reverse gear is compulsory.

Maximum dimensions Length: 4800mm
Width: 2000mm
Height: 1030mm
Front plus rear overhangs not to exceed 80% of the wheelbase.
Difference between front and rear overhangs not to exceed 15% of the wheelbase.
Bodywork Open or closed cockpit
Rear wing Maximum of 2 elements, which must fit within a 150x400mm cross section. Maximum span of 1800mm
Minimum weight (without driver) Related to engine capacity
Up to 1000cc: 475 kg
1000cc - 1300cc: 495 kg
1300cc - 1600cc: 515 kg
1600cc - 2000cc: 535 kg
2000cc - 2500cc: 575 kg
2500cc - 3000cc: 625 kg


See alsoEdit


  1. ^ Technical Regulations for Production Sports Cars (PDF). FIA Sport / Technical Department. 2011. pp. 1–19.