Luxury Sport Cars Dony Blog's

The Porsche 962 car (also known as the 962C in its Group C form) was a sports-prototype racing car built by Porsche as a replacement for the 956 and designed to mainly to comply with IMSA's GTP regulations, although it would later compete in the European Group C formula as the 956 had. The 962 was introduced at the end of 1984, from which it quickly became successful through private owners while having a remarkably long-lived career, with some examples still proving competitive into the mid-1990s. Beyond even modification, some teams took it upon themselves to reengineer the entire car. One of the notable problems of the 962 was the lack of stiffness in the aluminium chassis, which meant that some teams took it upon themselves to design new chassis, and then buy components from Porsche to complete the car, although some also had unique bodywork as well. Some teams would then offer their 962s to other customer teams.

Porsche debuted the 962 at the 24 Hours of Daytona with Mario and Michael Andretti driving the factory car which led the race until it retired during lap 127 with engine and gearbox problems. For 1985, the 962C would debut in the World Sportscar Championship, but ironically the car lost to an older 956, which had already taken WEC top-honors four times. Under pressure from new cars from Jaguar and Mercedes-Benz, in 1987 Porsche again brought in a new engine, a more durable and powerful 3.0 L unit which powered the car to an overall win at the 1987 24 Hours of Le Mans, Porsche's record seventh consecutive victory at the race. After a post-'87 "dry spell", Porsche customer Jochen Dauer got the 962 re-classified as a road legal GT1 car under a loophole in the new ACO regulations for the 1994 24 Hours of Le Mans.

Source: http://en.wikipedia.org/wiki/Porsche_962

The Porsche 917 is a racing car that gave Porsche its first overall wins at the 24 Hours of Le Mans in 1970 and 1971. Powered by the Type 912 flat-12 engine of 4.5, 4.9, or 5 litres, the long-tailed version was capable of a 0-62 mph (100 km/h) time of 2.5 seconds and a top speed of over 254 mph (409 km/h). In the 1973 Can-Am series, the turbocharged version Porsche 917/30 developed over 1,100 bhp (820 kW), and as much as 1,580 bhp (1,180 kW) in qualifying tune. The 917 is one of the most iconic sports racing cars of all time, largely for its high speeds and high power outputs, and was made into a movie star by Steve McQueen in his 1971 film Le Mans.