The Porsche 911 (pronounced Nine Eleven, German: Neunelfer or 911er) is a 2-door sports coupe made by Porsche AG of Stuttgart from Germany. It has a unique design, rear engine and independent rear suspension. The 911er engine was also air-cooled until the Type 996 in 1998. Since 911 introduction in autumn 1963, it has undergone continuous development. But the basic concept has remained almost unchanged throughout its evolution.Throughout 911ers lifetime, the 911 has been modified by private groups and by the factory for racing and other forms of automotive competition. It is among most successful sports cars ever. In the mid 1970s, Porsche 911 Carrera RSRs won major world championship races such as Targa Florio, Daytona, Sebring and Nürburgring, also against prototypes. The Porsche 911-derived 935 turbo also won the coveted 24 Hours of Le Mans in 1979.
