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 outright competition. The Group R regulations were created in 2012 as a replacement for Group A and Group N cars, and took effect from 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. As part of its structure, the Group R regulations have a provision for GT cars, known as RGT.
Classes under Group R 
Group R consists of six classes, designated R1, R2, R3, R4, R5 and RGT; some of these groups will contain their own sub-groups, with cars allocated to each group based on their weight, engine size and powertrain. 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; specially-prepared R2 cars are 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 are not eligible to compete in either the WRC-2 or WRC-3 championships, but may instead compete for World Championship points alongside World Rally Cars.
|R1A||Up to 1400cc||Normally-aspirated||Petrol||980 kg||Two-wheel drive||2500 per year||WRC-3||Toyota TMG Yaris R1A|
|R1B||1400cc to 1600cc||Normally-aspirated||Petrol||1030 kg||Two-wheel drive||2500 per year||WRC-3||Renault Twingo R1|
|R1T||1400cc||Turbocharged||Petrol||TBA||Two-wheel drive||2500 per year||WRC-3||TBA|
|R2B||1400cc to 1600cc||Normally-aspirated||Petrol||1030 kg||Two-wheel drive||2500 per year||WRC-3, Junior WRC||Ford Fiesta R2|
|R2C||1600cc to 2000cc||Normally-aspirated||Petrol||1080 kg||Two-wheel drive||2500 per year||WRC-3, Junior WRC||Ford Fiesta R2|
|R3C||1600cc to 2000cc||Normally-aspirated||Petrol||1080 kg||Two-wheel drive||2500 per year||WRC-3||Renault Clio R3|
|R3D||Up to 2000cc||Supercharged||Diesel||1150 kg||Two-wheel drive||2500 per year||WRC-3||Fiat Grandepunto R3D|
|R3T||Up to 1600cc||Turbocharged||Petrol||1150 kg||Two-wheel drive||2500 per year||WRC-3||Citroën DS3 R3T|
|R4||Greater than 2000cc||Turbocharged||Petrol||TBA||Two- or four-wheel drive||n/a1||WRC-2||Subaru Impreza R4|
|R5||1600cc||Turbocharged||Petrol||TBA||Four-wheel drive||TBA||WRC-2||Peugeot 208 R5|
|RGT||No limit||Turbocharged or supercharged||Petrol||TBA||Two-wheel drive||TBA||none||Lotus Exige R-GT|
- ^1 — The R4 class is for cars competing under Group N regulations for production cars prior to 2013. No new cars will be homologated under Group N regulations, and the R4 category will be gradually phased out.
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