The 911RSR

Winner of the 24-Hours of Daytona, a 2.8-liter flat six lightweight 911 Porsche was certainly a masterpiece.  Redline tachometers showed 10,000 and able to rocket at 300 horsepower, these cars had been built to meet the most strenuous of mechanical tolerances.   Even Matra & Mirage-Ford and Ferrari couldn’t match up their prototype designers to this level of perfection.   Uniquely designed for the racetrack, underneath the 911RSR you could easily spot the regular street Porsche 911 within.  Yet… The RSR was a different animal.

This could not be said for the Mirage-Ford or the Matra or for that matter the Ferrari, which were had specific designs for uses on tracks.  They could not just enter these same cars into any rally or street driving, which exclusively focused itself on racing.   Ferrari, as well during those years, having to exclusively battle powerful contenders, where also devised especially for racing, on top of that, they developed several racecars specific to meet specific needs.  Popularity of Ferrari, bragging rights and mega enthusiast Enzo Ferrari himself attended events directly with the drivers.



Unlike just bolting on changes to a body, you could never make that Ferrari street version without extensive changes.   Never the less, the power punch these cars displayed must have been a site to see.  This 1973 Ferrari 365 GT.  What a feeling it would have been to have had a chance to open one of these up for a race.




Heavier parts than from stock maximized that singled out potential of speed and could handle those rigorous demands of track stress.   With speeds reaching close or even above the 170 mph range, the sense of perfection and nimble needed to make those drivers one with the pavement.

Nimble, quick and a car that you would recognize in your garage, these unassuming sleepers were perfect for driving.

They had some interesting fender adaption to allow for cooling and race wheel fittings.  They also stock interiors and parts modified to completely add to weight and fitted with driver protection.  Even paint was pretty much not as thick   All of them had that all so familiar ducktail while retaining much of the remaining Porsche shape.

The Porsche RSR were raced at all the famous endurance races.  The 24 Hours of Le Mans, 24 Hours of Daytona, 24 Hours of Spa-Franchorchamp, the 12 Hours of Sebring, and 1,000 mile Petit Le Mans at Road Atlanta.    You could also find historical evidences that they raced too at the 24 Hours of Nurburgring and the Nordscheife tract.   They also were found to be a popular entry for the Dubai 24 Hour.  Al of the races often were aimed at GT3 and below cars with a mixture of professional and pro-am drivers.

Porsche 911 RSR


Country of Origin: Germany
Numbers built: 49
Production year: 1973
Major Wins: 1973 Sebring 12 Hours (Hurley Haywood / Peter Gregg / Dave Helmick)


Engine configuration: 911/72 B 6
Location: Rear, longitudinally mounted
Construction: Magnesium alloy block and head
Displacement: 2.808 liter / 171.4 cu in
Bore/Stroke: 92.0 mm (3.6 in) / 70.4 mm (2.8in)
Compression: 10.5:1
Valvetrain: 2 valves / cylinder, SOHC
Fuel Feed: Bosch K-lectronic Fuel Injection
Aspiration: Naturally aspirated (how we like it)


Chassis/body: Unitary steel
Suspension: Trailing arms, coil springs over shock absorbers
Steering: Rack-and-pinion
Brakes: Ventilated Discs, all-round
Gearbox: 5 speed manual
Drive: Rear wheel drive


Weight: 840 Kilo / 1852 lbs
Length, Width, Height: 4128 mm (162.5in) / 1651mm (65in) / 1321 mm (52in)
Wheelbase / Track (fr/r): 2272 mm (89.4in) / 1402mm (55.2in) / 1422mm (56in)


Power: 308 bhp / 230 KW @ 8,000rpms
Torque: 290 Nm / 214ft lbs @ 6300 rpm
BHP/Liter: 110 bhp / liter
Power to weight: 0.3 bhp / kg
Top Speed: 280 km/h / 174 mph
0-60: 5.0 seconds


5 responses to “The 911RSR

  1. Hi Blogger abauerporsche,
    I like your blog! I enjoyed reading about Herr Bauer and his story since I am from Germany myself. Since he passed away last year why not write a little bit about his years after retirement. Did he still come by to the shop once in a while?

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