Defines "supercar," then and now. It was V12-powered, ludicrously impractical, stupidly fast and impossible to see out of. It also pioneered Lamborghini doors.
Porsche built 25 917s for homologation in 1969. It won Le Mans in 1970 and 1971, only losing when the rules changed. The 917 still holds the Le Mans fastest lap record.
