porsche 934Porsche 934 Turbo RSR. Using the 930 as a basis, the 934 RSR was a racing version of the Porsche 911 Turbo prepared to FIA Group 4 rulesThe Porsche 934 is a racing version of the Porsche 911 Turbo, prepared to FIA Group 4 rules, similar to the Porsche 935 which was prepared to FIA Group 5