Originally posted by vat_man
The 959 was homologated under the old Group B rules (the F40 was also built with an eye to these rules, but the old 288 (I think) was built to meet them) which the old Audi Quattro, the Ford RS200, Lancia Delta S4 and other insanities were also built for).
Porsche were running a couple of years behind everyone with the car and eventually decided not to rally it in the WRC, but the really blow came when the cars were banned after two incidents in '86 - 3 spectators were killed at the Portugese Rally, and then in May Henri Toivonen and his co-driver Sergio Cresto were killed driving a Lancia Delta S4. Just about everyone pulled out of Group B straightaway, and the category was immediately banned for '87.
Bit of motorsport history for you.