The 1973 Porsche 911 Carrera RS is considered by many Porsche enthusiasts to be the greatest classic 911 of all time. The RS stands for Rennsport in German, meaning race sport in English. 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 built so that Porsche could enter a racing series that that needed a certain minimum number of production cars to qualify. Compared with a standard 911S, the Carrera 2.7 RS had a larger 2687cc engine that developed 210bhp, it also had revised and stiffened suspension, a “ducktail” rear spoiler, larger brakes, wider rear wheels and wider rear wings. In RS Touring form it weighed 1075 kg (2370 lb), in Lightweight form it was about 100 kg (220 lb) lighter, the saving coming from the thinner gauge steel used for parts of the body shell and also the use of thinner glass. In total, 1580 were made, comfortably exceeding the 500 that had to be made to qualify for the vital FIA Group 4 class.