Porsche 924/928

The Porsche 924 is a sports car produced by Audi in Neckarsulm, Germany, on behalf of Porsche from 1976 until 1988. A two-door, 2+2 coupé, the 924 replaced the 912E and 914 as the company's entry-level model.

In 1979, Porsche unveiled a concept version of the 924 at the Frankfurt Auto show wearing Carrera badges. One year later, in 1980, Porsche released the 924 Carrera GT, making clear their intention to enter the 924 in competition. By adding an intercooler and increasing compression to 8.5:1, as well as various other little changes, Porsche was able to develop the 924 Turbo into the race car they had wanted, dubbing it the "924 Carrera GT". 406 examples (including prototypes) of the Carrera GT were built to qualify it for Group 4 racing requirements

The Porsche 928 is a luxury grand tourer produced by Porsche AG of Germany from 1978 until 1995. Originally intended to replace the company's iconic 911, the 928 combined the power, poise, and handling of a sports car with the refinement, comfort, and equipment of a luxury sedan. The 928 became the top-of-the-line production car sold by Porsche. Porsche executives believed such a flagship would have wider appeal than the compact 911.

Porsche's Racing Department never officially entered or prepared a racing 928 for a pure works entry. Only once Porsche decided to make it obvious to the 911 enthusiasts that they usually tended to underrate the racing genes of the 928. Porsche then "arranged" this 928GTR to compete against the then-dominant 911 (993GTR) on the race track. In order not to offend sensibilities of their traditional 911 customers by openly challenging them with a Works 928GTR offering, Porsche asked Max Moritz Racing, their longtime private racing partner from next door Reutlingen to enter a 928GTR Cup as a 'semi-works' car.