No car won the Le Mans 24 Hours more times than Porsche's 956 and its long-wheelbase sister, the 962. And no car won more world championship sportscar races, or championships for that matter. The career statistics of the Group C and IMSA GTP coupe give the machine a pretty much irrefutable claim to the title of greatest sportscar of the past 70 years. But the 956/962 deserves this unofficial crown for many more reasons.
Longevity is one of them. Porsche's prototype won on its debut at Le Mans in 1982 in 956 guise, and claimed a sixth in a row in 1987 as the 962C. Its days were far from over in the Group C arena, however. It would almost certainly have won the 24 Hours in 1988 but for either one of two separate and distinct fuel issues, but it still had another victory at the French enduro in the tank as a GT car: the Dauer 962 Le Mans Porsche to give it its full name, in 1994.
The Porsche's last victory in the cauldron of the world championship came at Dijon in 1989. Quite literally. It was a steaming hot day and the Goodyear tyres on the best of the Joest 962Cs outlasted the Michelins on the Mercedes-powered Saubers that won every other race that year. And still it went on. The last of the 962's five victories in the Daytona 24 Hours IMSA GT Championship opener came as late as 1991; its final win in the series at Road America in 1993 with Joest's twin-wing special, arguably the ultimate version of the design.