The Carrera GTR was the ultimate 924 Street/Race Car in 1981. The GTR had larger flares, larger wheels and tires, improved brakes and a whopping 375 horsepower from the 2.0L turbocharged dry-sump engine. At $75,000, the GTR would have cost over $200,000 in today’s money, but what you got was a 180 mph screamer for the street, but in full race trim.
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.
These cars were designed by the factory to race in SCCA D Production Championship starting in 1979. The Porsche project number of these race cars was 933. Only 16 were built by the factory. However, if you had the right connections, you "could" buy the parts as a kit from Porsche to convert your street car into a fully race-ready 924.
As a top-secret project, the Porsche Museum workshop and the Porsche Heritage department worked on a special front-engined sports car from 1981. 40 years ago, starting on May 15, this car competed in the Deutsche Rallye-Meisterschaft (German Rally Championship). Behind the wheel was non other than Walter Röhrl, with Christian Geistdörfer next to him.