In the early 1970s, Porsche took over in sports car racing where Ferrari left off, encouraged by the FIA’s shift from exotic sports prototypes to production-based machinery. Accordingly, in 1972, Porsche homologated the 911 for Group 4 competition, taking the 2.4-litre 911S and subjecting it to myriad improvements, creating the RS 2.7 Carrera. As Porsche’s fastest road car to that point, the RS 2.7 was best described by Britain’s Autocar as “sensational – even by Porsche standards.”

The next evolution was the radical RSR Carrera, developed to meet new Group 5 regulations. Using a twin-plug 2.8-litre engine with enhanced fuel injection, revised camshaft timing and higher compression, the RSR Carrera delivered some 300 hp. It also included nine-inch front wheels, 11-inch rear wheels, an integral roll cage, large adjustable ventilated disc brakes and 15-inch light-alloy BBS wheels. A 29-gallon fuel cell, fibreglass body components and a revised suspension completed the package.

Peter Gregg and Hurley Haywood solidified the RSR’s reputation, charging to victory in the 24 Hours of Daytona, the first race of the 1973 World Manufacturers Championship. This victory was only the beginning; by season’s end, the Carrera RSR had won the European championship for Grand Touring Cars, the Camel GT Challenge Cup (IMSA), the Targa Florio and numerous races in the Trans Am Championship series.

This car was auctioned off by RM Auctions in May of 2010 at the Grimaldi Forum, Monaco.

Air-cooled, horizontally opposed, rear-mounted six-cylinder engine with fuel injection, five-speed Type 915/08 manual gearbox in rear transaxle, fully adjustable four-wheel independent suspension with coil-over shock absorbers and adjustable anti-sway bars, and four-wheel hydraulic disc brakes. Wheelbase: 2,268 mm (89.3")

Source: RM Auctions
Photo Credit: Copyright Tom Wood

Porsche 911 RSR