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Porsche have been using turbochargers in their racing cars since the late 1960's, but the first turbo road car didn't go into production until 1975. The 930 (a turbo version of the 911, and better known as the 911 Turbo) was a luxury sports coupe that featured Bosch fuel injection and a KKK turbocharger allowing it to reach 160 mph. Interestingly, the 930 only had a 4-speed gearbox due to the extra torque of the turbo engine, whereas the standard Porsche 911 had a 5-speed gearbox.

In 1978, the 3.3 litre turbo was one of the fastest road cars available at the time. Porsche ceased production in 1989, and the 930 was replaced by the 964 Turbo in 1990, and featured a modified version of the old 930 engine.

The 930's were simply badged as "turbo", although the early U.S. models featured "Turbo Carrera" badges.

Now, although the 930 was pretty quick, it was challenging to drive at high speeds due to its short wheelbase and the rear engine layout, making it easy to oversteer. There was also a turbo-lag problem.

The biggest changes to the car came in 1978 when the engine was upgraded to 3.3 litres and an air-to-air intercooler was added. The rear spoiler was raised and re-shaped to allow room for the intercooler. Although this increased power and torque, this also made the car heavier which caused a significant change to the handling when compared to the 3.0 model.

Porsche were forced to withdraw the 930 from the U.S. and Japanese markets in 1980 due to stricter emissions rules, but they continued to be made available in Europe.

This red 1982 Porsche 911SC was modified into a "Flachbau" ("slantnose") by Camillo & Domenico Scaduto of Carrozzeria Italia at their restoration shop in Escondido, California.

This video clip features a 1989 Porsche 930 melting the polar ice caps all by itself! Strictly for petrol heads - known as gear heads in the U.S. I believe. 

Classic 911 Turbo - Public Domain Photo