In relation to motorsport governed by the FIA, Group N refers to a set of regulations providing 'standard' production vehicles for competition, often referred to as the "Showroom Class".

This contrasts with the Group A all-out competition production-derived vehicles. Group N cars are limited in terms of modifications made from standard specification. Group N was introduced by the FIA in 1982 to replace the outgoing Group 1 as "standard touring cars".

To qualify for homologation, a minimum of 2500 cars of the competing model have to be built in one year, out of 25,000 for the entire range of the model (e.g.: 2500 Subaru Impreza WRX, out of 25,000 Subaru Impreza).

Road racing[link]

Renault 5 GT Turbo, Gr. N world championship winner in 1989 & 1990

While Group A became the standard category for international touring car racing, Group N found a home as a more economic class in national touring car racing. In many countries, there would often be two touring car championships, one for Group A and one for Group N. The category had some brief success with the demise of the Supertouring class in the late 1990s, when a few national regulations were relaxed to allow a greater number of modifications, in the guise of Super Production.

Endurance racing[link]

The category is still used in circuit racing all over the world, notably in Japan who has the long running Super Taikyu (スーパー耐久, Super Taikyu^?, translated as Super Endurance), as well as in the Italian ETCS endurance series run by Peroni Promotion, but was once again relegated to a secondary status with the introduction of Super 2000, the class of cars currently run in the World Touring Car Championship.

Rally racing[link]

A Subaru Impreza WRX STI at the 2006 Acropolis Rally.

In Rallying, the Production World Rally Championship is run under Group N rules. The cars used were modified road cars, often based on turbocharged, four wheel drive versions of standard small cars such as the Subaru Impreza WRX and the Mitsubishi Lancer Evolution, although a wide range of vehicles is homologated by the FIA for use in Group N. Apart from FIA sanctioned events, a lot of rallies at national levels are run under Group N. Some local variants of Group N have been created to allow other marques to compete where Group N is the national formula.

Allowed modifications[link]

The range of modifications allowed is quite narrow - few mechanical engine modifications are allowed (save for lightening within set limits and baffled sumps) although the choice of ECU is free, and this can liberate some extra power itself, and most of the modifications allowed are to promote longevity rather than increased performance, although the boundaries of these two areas are blurring. Furthermore, cars with forced induction engines are fitted with a restrictor in front of the charger to limit power.^[1]

Originally, Group N meant that all the interior trim had to be present (including the rear seat), whereas this has now changed to allow removal of the trim aside from the dashboard and replacement of the door trim. The springs and dampers are free, as are the internals of the gearbox and the final-drive ratio, providing that the homologated gear ratios and gearchange pattern are respected. This allows the use of dog-engagement gearboxes, providing quicker gearchanges and longer gearbox life. There is provision for strengthening of the suspension components and bodyshell, providing this doesn't alter the operating principle.^[2]

The FIA and many national motorsport associations are moving towards making rallying championships based in Group N, in an attempt to reduce costs, reinforce the link between motorsport and the car that the member of the public drives, and to reduce the environmental impact of motorsport. The GpN 4WD Turbo rally car category is currently undergoing the process of being renamed as R4 for 2011. The key areas being standard road car bodywork and driven wheels to be retained as the road car that can be bought from the showroom.

References[link]

See also[link]

	Book: Rallying
Wikipedia books are collections of articles that can be downloaded or ordered in print.

	Book: Touring car racing
Wikipedia books are collections of articles that can be downloaded or ordered in print.

External links[link]

• Super Taikyu Official Site

Look up group in Wiktionary, the free dictionary.

A group is a number of things or persons being in some relation to one another.

Mathematics[link]

• Group (mathematics), a set together with a binary operation satisfying certain algebraic conditions
  • Group theory, the study of groups
  • Group action, a way of describing the symmetries of objects using groups
  • Group isomorphism, a one-to-one correspondence (function) between two groups which respects the given group operations
  • Group object, a kind of generalization of a group which is built on more complicated structures than sets

Science[link]

Chemistry

• Functional group, a functional entity consisting of certain atoms whose presence provides a certain property to a molecule
• Group (periodic table), a column in the periodic table of chemical elements

Biology

• Cultivar group, a formal classification category in the International Code of Nomenclature for Cultivated Plants (ICNCP)
• Group selection, in evolutionary biology, the idea that alleles can become fixed or spread in a population because of the benefits they bestow upon groups of organisms

Cosmology

• Galaxy groups and clusters, a small number of galaxies near each other
  • Local Group, the group containing the Milky Way Galaxy

Other

• Group delay and phase delay
• a set of lenses stacked together
• Group (stratigraphy), in geology, a lithostratigraphical unit; a group consists of formations, or rock strata.

Business[link]

• Business group, a legal entity comprising several companies

Sociology[link]

• Social groups, a description of various human groups
  • Peer group
  • Working group
  • Interest group
• Group action (sociology)
• Group affective tone
• Group aggression
• Group attribution error
• Group behaviour
• Group cohesiveness
• Group conflict
• Group development
• Group dynamics
• Group guilt
• Group narcissism
• Group polarization
• Group psychological abuse
• Group scapegoating
• Group-serving bias

Computing and the internet[link]

• Group (computing), a collection of users or other objects
  • Group identifier (Unix)
• Group editor, a program that allows many people to edit a shared document over a computer network
• Usenet newsgroup

Military[link]

• Army group
• Group (air force), an air force formation
• Group Captain

Other uses[link]

• Breed Groups (dog), the group or category to which breeds of dogs are assigned by kennel clubs
• Group (auto racing), a category of car allowed to compete in auto racing.
• Group insurance covering people with common characteristics
• A musical ensemble:
  • Boy band
  • Girl group
  • Groupies

See also[link]

• Grouping (disambiguation)
• The Group (disambiguation)
• Functional group (disambiguation)

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