page_title: Porsche 911
section_title: 911 Carrera RS (1973 and 1974)
hierarchical_section_title: Porsche 911 / Air-cooled engines (1963–1998) / 911 Carrera RS (1973 and 1974)
caption_attribution_description: La vente aux enchères RM auctions aux pied des Invalides à Paris le 4 février 2015.
context_page_description: The Porsche 911 is a two-door, 2+2 high performance rear-engined sports car. Introduced in September 1964 by Porsche AG of Stuttgart, Germany. It has a rear-mounted flat-six engine and all round independent suspension. It has undergone continuous development, though the basic concept has remained unchanged. The engines were air-cooled until the introduction of the Type 996 in 1998, with the 993, produced from 1994–1998 model years, being the last of the air-cooled Porsche sports cars.
  The 911 has been modified by private teams and by the factory itself for racing, rallying, and other forms of automotive competition. It is among the most successful competition cars. In the mid-1970s, the naturally aspirated 911 Carrera RSR won major world championship sports car races, such as Targa Florio and 24 Hours of Daytona, even against prototypes. The 911-derived 935 turbo also won the 24 Hours of Le Mans in 1979 and Porsche won World Championship for Makes titles in 1976, 1977, 1978 and 1979 with 911-derived models.
  In the 1999 international poll to determine the Car of the Century, the 911 came fifth.
context_section_description: RS stands for Rennsport in German, meaning race sport. The Carrera name was reintroduced from the 356 Carrera which had itself been named after Porsche's class victories in the Carrera Panamericana races in Mexico in the 1950s. The RS was developed to meet motorsport homologation requirements. Compared to a standard 911S, the Carrera 2.7 RS had a larger engine (2,687 cc) developing 210 PS (150 kW; 210 hp) with Bosch (Kugelfischer) mechanical fuel injection, revised and stiffened suspension, a "ducktail" rear spoiler, larger brakes, wider rear wheels and rear fenders, to fit 185/70VR15 & 215/60VR15 Pirelli Cinturato CN36 tyres. In RS Touring form it weighed 1,075 kg (2,370 lb), in Sport Lightweight form it was about 100 kg (220 lb) lighter, the saving coming from thin gauge steel used for parts of the body shell and also the use of thinner glass. In total, 1,580 units were made, and qualified for the FIA Group 4 class. 49 Carrera RS cars were built with 2,808 cc (2.8 L) engines rated at 300 PS (220 kW; 300 hp).
  For the 1974 IROC Championship (which started in December 1973), 1973 Carrera RSR models were fitted with the 3.0 engine and a flat "whale tail" in place of the ducktail spoiler along with wide body panels and large tyres.
  In 1974, Porsche developed the Carrera RS 3.0 with mechanical fuel injection rated at 230 PS (170 kW; 230 hp). Its price was almost twice that of the 2.7 RS, but it offered racing capability. The chassis was largely similar to that of the 1973 Carrera RSR and the braking system was from the 917 racing car. The use of thinner metal plate panels and a minimalist interior enabled its weight to be reduced to around 900 kg (2,000 lb).
  The Carrera RSR 3.0 was sold to racing teams and scored wins in several major sports car races of the mid-1970s. Also, a prototype Carrera RSR Turbo (with 2.1-litre engine due to a 1.4x equivalency formula) came second at the 24 Hours of Le Mans in 1974 and won several major races, a significant event in that its engine would form the basis of many future Porsche attempts in sports car racing. This, and the earlier 917, was Porsche's commitment to turbocharger applications in its cars.
caption: Porsche 911 Carrera RS 2.7 touring
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