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In 1979, Porsche unveiled a concept version of the 924 at the Frankfurt Auto show wearing Carrera badges. One year later, in 1980, Porsche released the 924 Carrera GT, making clear their intention to enter the 924 in competition. By adding an intercooler and increasing compression to 8.5:1, as well as various other little changes, Porsche was able to develop the 924 Turbo into the race car they had wanted, dubbing it the "924 Carrera GT". 406 examples (including prototypes) of the Carrera GT were built to qualify it for Group 4 racing requirements.
Porsche-924-Turbo
Porsche upgraded the performance of its 924 with the introduction of a turbocharged model in 1979. While the lower end of the engine remained unchanged, many improvements were made to the upper end of the engine as well as the drivetrain. On the outside, the car gained alloy wheels, a distinctive NACA duct in its hood, and a rear spoiler. Horsepower increased from the naturally aspirated 125 bhp to 170 bhp in the turbo.
Porsche 924 (1976 - 1986)
The base model Porsche 924 was produced for model years 1976 to 1986. During its production run, VW decided to stop manufacturing the engine blocks used in this version (the 2.0 L 924), forcing Porsche to continue production for model year 1987 with a more powerful engine, calling it the 924S. The base model 924 had a production run of 121,000 vehicles approximately.
GTP cars were produced in 1980, three of which were special LeMans race cars. The cars had the 2.0L turbocharged 924 engine with a huge front-mounted intercooler and increased boost to increase output to 320 HP and 285 lbs/ft of torque. The engine used Bosch mechanical fuel injection and with a weight of 2050 pounds had a top speed of 180 mph. It was third in the GTP class, with an 6th place finish overall, and another finished fifth in class and 12th overall.