Production of the Porsche 930 began in 1975 and, although it appealed to car companies, it was not designed for racing.
While the original purpose of the 911 Turbo was to gain homologation for the 1976 racing season, it quickly became popular among car enthusiasts. 
Since Porsche wanted to compete in the 1976 season, they gained FIA homologation for the Porsche Turbo for Group 4 in Nr. 
