The Porsche 956 was a Group C sports-prototype racing car designed by Norbert Singer and built by Porsche in 1982 for the FIA World Sportscar Championship . It was later upgraded to the 956B in 1984. Driven by Stefan Bellof in 1983, this car holds the all-time record for the fastest vehicle ever to lap the famed Nürburgring Nordschleife, completing the 20.832 km (12.93 mi) circuit in 6:11.13 during qualifying for the 1000 km Sports Car race. (Wikipedia)