Strewth just found this out
Look at all these cars classed as Group B
Car Class Homologation n° Date of Homologation
Alfa Romeo Alfasud Sprint 6C
Audi Quattro 80 A1 B-671 1 January 1981
Audi Quattro A1 B-229 1 January 1983
Audi 80 Quattro A2 B-231 1 January 1983
Audi Quattro A2 B-243 1 January 1983
Audi Quattro A2 B-242 1 May 1983
Audi Sport Quattro S1 B-243 1 May 1984
1 July 1985
BMW M1 B-240 1 March 1983
Citroën BX 4TC Under 3000cc B-279 1 October 1986
Citroën Visa Trophée Under 1300cc B201 1 January 1982
Citroën Visa Chrono II B-219 1 October 1982
Citroën Visa 1000 Pistes
Daihatsu Charade 926 Turbo Under 1300cc B-268 1 January 1985
Daihatsu Charade DeTomaso 926R Under 1300cc Prototype
Ferrari 308 GTB Michelotto B-220 1 October 1982
Ferrari 308 GTB Michelotto B-236 1 January 1983
Ferrari 308 Quattrovalvole B-241 1 April 1983
Ferrari 288 GTO B-273 1 June 1985
Ferrari 288 GTO Evoluzione Prototype
Ford RS200 B-280 1 February 1986
Ford Escort RS 1700T Prototype [nb 1]
Lada VFTS B-222 1 October 1982
Lada Samara EVA Prototype
Lancia 037 Rally B-210 1 April 1982
Lancia Delta S4 B-276 1 November 1985
Mazda RX-7 4x4 B-255 1 February 1984
Mercedes-Benz 190E Cosworth Prototype [nb 2]
MG Metro 6R4 B-277 1 November 1985
Mitsubishi Lancer 2000 Turbo B-675 1 April 1981
Mitsubishi Lancer 2000 Turbo B-230 1 January 1983
Mitsubishi Starion 4WD Prototype
Moskvich 2141-KR Prototype
Nissan 240RS B-233 1 January 1983
Opel Manta 400 B-237 1 March 1983
Peugeot 205 T16 B-262 1 April 1984
Peugeot 305 V6 [nb 4]
Peugeot 504 Pickup B-229 1 December 1982
Porsche 924 Turbo Carrera GT B-203 1 January 1982
Porsche 911 SC RS B-207 1 March 1982
Porsche 911 Turbo B-208 1 January 1982
Porsche 928S B-209 1 January 1982
911 Carrera B-282 1 June 1986
Porsche 928S B-283 1 June 1986
Porsche 911 Turbo B-284 1 June 1986
Porsche 959 Prototype [20]
Porsche 961 Prototype
Renault 5 Maxi Turbo
Škoda 130 LR B-269 1 January 1985
Subaru XT 4WD Turbo B-275
Talbot Sunbeam B227 1 December 1982
Talbot Horizon Prototype [nb 5]
Talbot Samba B-232 1 January 1983
Toyota Celica Twin-Cam Turbo B-239 1 March 1983