|The Mercedes 300 SEL 6.3 was the world’s fastest four-door in the late-1960s. But it wasn't a sports car, let alone a track machine. Former BMW engineers Melcher and Aufrecht had other ideas. They expanded the V8 to 6.8 litres and tuned it for 428bhp. They took this unlikely warrior to the Spa 24 hour race in 1971. Everyone laughed.|
They called it the Red Pig (Rote Sau in German).