Group CN is a category of motorsport, introduced by the FIA in the early nineties for sports car racing. Group CN cars are mainly seen in hillclimbing championships or sports racing series. 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
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 open to Peugeot powered 4 or Funyo 5.
A Group CN racing class exists in many countries, many of which utilize radicals. Examples are the which features the Radical SR3 and the .
GT & Prototype Challenge
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|
|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|
- Technical Regulations for Production Sports Cars (PDF). FIA Sport / Technical Department. 2011. pp. 1–19.