For the 1974 season, Porsche produced yet another evolution of the 911. Developed around the 3-litre RS homologation special, the 3-litre RSR became the most successful Group 4 car of its era. In its early years, the RSR swept all before it in IMSA, Trans Am and the FIA World Championship, production beginning in late 1973.
They were equipped with Typ 911/75 engines featuring high-lift camshafts, Bosch slide injection and twin plug ignition. There was also a large capacity dry sump oil tank and dual megaphone exhaust from the 2.8 RSR. Displacement remained unchanged from the RS at 2992cc but the compression was upped from 9.8 to 10:3.1, the result having been 330bhp at 8000rpm.
The five-speed transmission from the RS was installed along with a new dry plate Fichtel and Sachs sintered clutch. Coil springs were either steel or titanium. Visually the 3-litre RSR was enhanced with special five-spoke centre-locking 15-inch wheels, these having been 10.5-inches wide at the front and a massive 14-inches at the back. Ultra-light grassfire panels were used for the ventilated wheel arch extensions, bumpers, front lid, engine cover and rear spoiler.
Inside, the stripped-out cockpit got a solitary high-backed Recaro bucket seat with vinyl bolsters and cloth center, a six-point racing harness holding the occupant firmly in place.
Weighing in at a mere 900kg, the RSR was obviously a very quick car, in excess of 170mph having been possible while 0-60 took less than five seconds. Towards the end of 1974, most cars were coming out of the factory with closer to 350bhp, the last dozen examples (made from mid 1974) having been built on the 1975 model year H-series platform. Consequently, these cars use a 560 as opposed to a 460 VIN prefix. Some later cars were also equipped with the Carrera Turbo-style flat front bumper first used by Peter Gregg and the Brumos team.
The RSR raced through the 1974 and ’75 seasons vanquishing the opposition and providing Porsche with its most successful customer racing car.
1974 Porsche 911 RSR 3.0 For Sale
Details: Seller Edmond Harris is asking £525,000. Car is located in Oxfordshire, England.
Seller Comments: “The car raced in its original light yellow for 1974 and then was painted – to the outer panels only – in white with the famous Harley Davidson sponsorship for Le Mans in 1975. It wore the race No 69. Sold 1977 to Ecuador where it remained largely unraced, until being bought back into Germany 1981. The car remained in this continuous ownership up until being sold 2 years ago.”
“Car was completely original, including – genuine – original matching No engine. I have known of the car for many years and inspected it long before restoration. The car was complete with all original panels, including fiber- glass parts and original factory flares etc. A true rarity to find an unmolested and original RSR, as so many were crashed or uprated to 934 and 935 spec over the years.”
“Fully restored to 1975 Le Mans ‘ Harley Davidson’ colours to the outside and original light yellow to the inside / underside, as raced and as original in period. The car is without doubt, when considering the history, originality and condition, one of the best 3.0 RSR there is. It was recently inspected by Nick Faure who raced the car when new and at Le Mans and he stated it is ‘exactly as raced and original’. Since restoration, the car raced at the Nurburgring Oldtimer where it finished 1st. The car is absolutely race ready and in superb condition throughout.”
Porsche 911 RSR 3.0 – Photos