Built in 1987, this pre-production 928 Club Sport was one of the five prototypes before the Club Sport variant of Porsche’s distinctive V8 coupe entered limited production in 1988. Against the ‘regular’ 928 GT, the Club Sport model was a lightweight version, equipped with twin and straight exhaust tail pipes, CS-type wheels, a wider rear track achieved through the use of a 17mm spacer, plus the no-cost option was the 'CS Club Sport' sticker on the front left wing.
In 1987, before the official launch of the 928 Club Sport model, five prototypes were built for Porsche's factory drivers: Derek Bell, Jochen Mass, Hans Stuck, Bob Wollek and Jacky Ickx. Hans Stuck's car is still in existence today and forms part of a Porsche collection in the Netherlands, while Jochen Mass's is believed to be in Scandinavia.
These special Club Sports were given to the drivers as their 'company car'. They were told the car had an up-rated engine (circa 300bhp) and suspension, and was lighter than standard. Their prototypes incorporated all of the aforementioned specifications; however, all five prototypes had a passenger-side mirror and full leather interior, unlike the production CS.