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From Wikipedia, the free encyclopedia

Group CN is a category of vehicles used in motorsport, introduced by the FIA in 1993 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 series

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 Masters

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 V

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 championships

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.

GT & Prototype Challenge

Ran as part of the Benelux-based Supercar Challenge, the GT & Prototype Challenge allows Group CN classification cars to compete; current competitors include the Radical SR3 and Norma M20 FC.

FIA Group CN technical regulations

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 also


  1. ^ Technical Regulations for Production Sports Cars (PDF). FIA Sport / Technical Department. 2011. pp. 1–19.
This page was last edited on 29 September 2023, at 18:04
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