In relation to motorsport governed by the Fédération Internationale de l'Automobile, Group R refers to a set of regulations providing production-derived vehicles for rally competition. The Group R regulations were created in 2008 as a gradual replacement for Group A and Group N rally cars. To comply with Group R regulations, a car must be homologated in Group A (or in some cases Group N) and receive one or more VR extensions. Each VR extension is a set of homologated parts and modifications, designed and sold (as a kit or as a complete car) by the manufacturer. As part of its structure, the Group R regulations have a provision for GT cars, known as RGT.
Group R consists of six classes, designated R1, R2, R3, R4, R5 and R-GT; some of these groups contain their own sub-groups, with cars allocated to each group based on their weight, engine size and powertrain. The first batch of rules, which were introduced in 2008, featured the R1, R2 and R3 classes. These were restricted to two-wheel drive cars with atmospheric engines up to 2000cc. Supercharged engines were allowed only in R3T (petrol) and R3D (diesel) sub-classes. Since 2015 the R1, R2 and R3 classes allow supercharged engines with a 1.5 equivalency factor for displacement.
Additional regulations were issued in 2011 which covered the R4 and R-GT classes; the R4 was conceived as an evolutionary step for previously-homologated Group N4 cars, turbocharged, all-wheel drive cars based on production models. The R4 class is for cars competing under Group N regulations for production cars prior to 2013. No new models would be homologated under R4 regulations, with the FIA taking the long-term view that these would be replaced by bespoke kit cars. The R4 Kit cars have a standard engine, four-wheel drive powertrain and suspension. In January 2017, French racecar manufacturer Oreca was selected as supplier.
R-GT was introduced to allow Grand Touring cars that competed in sports car racing to enter rallies. The R5 class was designed to replace Super 2000 cars, and its regulations were introduced in 2013. Prior to 2014, there was no specific championship for cars entered under R-GT regulations, and R-GT cars were ineligible to score points in any existing championship outside the World Rally Championship. The FIA R-GT Cup for R-GT cars started in 2015, sharing some events from the WRC and ERC events.
Teams and drivers are sorted into a specific championship based on the class their car fits into. Cars classified as R1, R2 and R3 contest the World Rally Championship-3 for two-wheel drive cars; especially-prepared R3T cars were also used in the Junior World Rally Championship. Cars classified as R4 and R5 compete in the World Rally Championship-2 alongside existing Super 2000 and Group N Production Cars. Cars classified as RGT compete in the R-GT Cup.
|RC1||WRC||1600cc||Turbocharged||Petrol||1230 kg||Four-wheel drive||2500 per year||WRC||Citroën C3 WRC|
|RC2||R5||1600cc||Turbocharged||Petrol||1230 kg||Four-wheel drive||TBA||WRC-2, WRC-3[a]||Škoda Fabia R5|
|R4||Over 2000cc||Turbocharged||Petrol||1300 kg||Four-wheel drive||n/a||none[b]||Subaru Impreza R4|
|RC3||R3T||Up to 1620cc||Turbocharged||Petrol||1080 kg||Two-wheel drive||2500 per year||none[c]||Citroën DS3 R3T|
|R3C||1600cc to 2000cc||Naturally aspirated||Petrol||1080 kg||Two-wheel drive||2500 per year||none[d]||Renault Clio R3C|
|1067cc to 1333cc||Turbocharged||none|
|R3D||Up to 2000cc||Supercharged||Diesel||1150 kg||Two-wheel drive||2500 per year||Fiat Grande Punto R3D|
|RC4||R2B||1390cc to 1600cc||Naturally aspirated||Petrol||1030 kg||Two-wheel drive||2500 per year||J-WRC||Ford Fiesta 1.6 R2|
|927cc to 1067cc||Turbocharged||Ford Fiesta Ecoboost R2|
|R2C||1600cc to 2000cc||Naturally aspirated||Petrol||1080 kg||Two-wheel drive||2500 per year||none||none|
|1067cc to 1333cc||Turbocharged||none|
|RC5||R1A||Up to 1390cc||Naturally aspirated||Petrol||980 kg||Two-wheel drive||2500 per year||Toyota TMG Yaris R1A|
|Up to 927cc||Turbocharged||none|
|R1B||1390cc to 1600cc||Naturally aspirated||Petrol||1030 kg||Two-wheel drive||2500 per year||Renault Twingo RS R1|
|927cc to 1067cc||Turbocharged||none|
|R-GT||No limit||Turbocharged or supercharged||Petrol||TBA||Two-wheel drive||TBA||R-GT Cup||Lotus Exige R-GT|
- Citroën DS3
- Ford Fiesta Mk 6
- Renault Twingo II
- Toyota Yaris
- Toyota Vitz
- Suzuki Baleno
- Suzuki Swift Italian homologation
- Citroën DS3 R3T
- Fiat Abarth 500 R3T
- Fiat Grande Punto R3D
- Honda Civic R3C
- Peugeot 207 R3T
- Renault Clio III R3C
- Renault Clio IV R3T
- Toyota GT86 R3C
Based on Group N
- Mitsubishi Lancer Evolution IX
- Mitsubishi Lancer Evolution X
- Subaru Impreza WRX STi 3rd Gen.
- Subaru WRX STI 4th Gen.
- Audi A1 SSM R4 (developed by Signed Streets Motorsport - Austria)
- Dacia Sandero R4 (digital concept by Oreca)
- Fiat 500X R4 (digital concept by Oreca)
- Ford Fiesta R4
- Lada Kalina R4 (digital concept by Oreca)
- Nissan Micra R4 (digital concept by Dytko Sport)
- Toyota Etios R4 (developed by Oreca)
- Toyota Yaris R4 (developed by Evolve Sport)
Cars approved for competition in the World Rally Championship-2:
- Citroën DS3 R5
- Citroën C3 R5
- Ford Fiesta R5
- Hyundai i20 R5
- Peugeot 208 T16 R5
- Škoda Fabia R5
- Volkswagen Polo GTI R5
- Proton Iriz R5
- Lotus Exige R-GT
- Porsche 911 GT3
- Porsche Cayman GT4 (Typ 981c)
- Abarth 124 Spider
- Aston Martin Vantage V8 R-GT
- Previously eligible to compete in the World Rally Championship-2 Pro.
- Previously eligible to compete in the World Rally Championship-2.
- Previously eligible to compete in the World Rally Championship-3 and Junior World Rally Championship.
- Previously eligible to compete in the World Rally Championship-3.
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Toyota said the car will be able to compete in the World Rally Championship under the R1A regulations once it is homologated by the FIA before the end of the year.
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- "Signed Streets Motorsport". www.facebook.com. Retrieved 2019-08-14.