<< Prev Page 2 of 2 The engine was bored out even more to 92 mm which resulted in a displacement of 2.8 litres. The compression ratio was raised to 10.5 : 1 and together with the displacement increase it resulted in a stunning leap of power of almost 100 bhp. Even wider rear wheels were fitted and to accomodate them the arches were flared even more, giving the RSR 2.8 a very aggresive stance. Porsche 917 derived vented and cross drilled discs replaced stock brakes to ensure that the fastest 911 to date stopped as quick as it went.
At its racing debut at the 1973 Daytona 24 Hours, the 911 Carrera RSR 2.8 immediately proved to be the car to beat that season. After the 3-litre prototype racers retired Peter Gregg and Hurley Haywood took the overall victory, beating the 7 litre Corvettes and 4.4 litre Ferraris. Further success was had at the Sebring 12 Hours and the Targa Florio of the same year. In the European GT Championship, where the RSR 2.8 was originally designed for, it was almost unbeatable, winning six of the nine rounds and the championship.
Throughout the season, Porsche campaigned a 'prototype' version of the 2.8, which featured further modifications that no longer made it eligible for the Group 4 class. These modifications were fitted to a new series of road cars, the 3 litre Carrera RS 3.0, making the RSR 3.0 eligible to race in 1974. The new car continued the 2.8's dominance in the Group 4 class and so did its replacement, the Turbocharged 934 of 1976. << Prev Page 2 of 2
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911 Carrera RS 2.7 Lightweight
The engine was bored out even more to 92 mm which resulted in a displacement of 2.8 litres. The compression ratio was raised to 10.5 : 1 and together with the displacement increase it resulted in a stunning leap of power of almost 100 bhp. Even wider rear wheels were fitted and to accomodate them the arches were flared even more, giving the RSR 2.8 a very aggresive stance. Porsche 917 derived vented and cross drilled discs replaced stock brakes to ensure that the fastest 911 to date stopped as quick as it went.