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In relation to motorsport governed by the FIA, Group N referred to a set of regulations providing 'standard' production vehicles for competition, often referred to as the "Showroom Class". This contrasted 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 had 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). The Group N regulations were officially replaced in 2013. No new cars will be homologated under Group A or Group N regulations, and instead existing cars are reclassified according to Group R rules (specifically the R4 class). The R4 class itself will be gradually phased out.〔 In 2015, the FIA realigned the rally classes yet again, finalizing the phase-out of R4.〔(【引用サイトリンク】url=http://www.dirtyimpreza.com/fia-wrc-production-rallying-class-changes-in-2015/ )〕 A new class, NR4 has been added, and is identical to the previous Group N class, just with a new name to fit in with the other "R" names. R4 cars are now not allowed in FIA sanctioned rallies in Europe, but since R4 was basically a transition group for old Group N, many of those could likely be re-homologated as NR4. ==Road racing== 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. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Group N」の詳細全文を読む スポンサード リンク
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