Porsche 911 Carrera RSR 2.1 Turbo #21 Schurti, Koinigg - 24 h LeMans 1974
Porsche 911 Carrera RSR Turbo 2.1, Le Mans 1974 | Porsche 91… | Flickr
1974 911 Carrera RSR Turbo 2.1 liter with exposed single turbo which produced 500hp. The road car derived RSR 2.1 came second at the 1974 24 Hours of Le Mans, beating a