Chassis # 911 460 0090

1974 Porsche IROC Carrera 3.0 RSR

The ex-Mark Donohue - Daytona winner

Price: £POA

One of only fifteen cars specially built by Porsche in 1973 for the inaugural 1973-1974 IROC, International Race of Champions, series at Riverside, USA.

A one-make televised race series conceived by Roger Penske, in which twelve championship title-winning drivers from the various top areas of motorsport, including Formula One, SCCA, Indycar and Nascar, competed together in identically prepared Porsche 3.0 IROC RSR’s for $175,000 total prize money - $43,000 going to the Daytona finale winner.  

Orange Chassis # 911 460 0090 – was first raced at Riverside in 1973 during the three elimination rounds, driven by Roger McCluskey, Denny Hulme and A.J Foyt. It was then one of just six cars to go through to the final held at Daytona - winning the race in the hands of Mark Donohue.

IROC Series Races - Chassis # 911 460 0042


27/10: Riverside - Race 1: Roger McCluskey
Car no. 12
Finished 8th

27/10: Riverside - Race 2: Denny Hulme
Car no.  5
Finished 8th

28/10: Riverside - Race 3: A. J. Foyt
Car no.  5
Finished 6th


14/02: Daytona – Finale Race: Mark Donohue
Car no. 1
Finished 1st

Whilst these cars visually resemble the road going 3.0 RS, they were assembled at the factory to (M491) RSR specification -

IROC RSR (M491) – Specification

Engine, Transmission & Suspension

• 3.0-litre Mechanical Injection Type 911/74 RSR engine
• 95 mm bore x 70.4 mm stroke, 10.3:1 compression
• 316 hp @ 8,000 rpm / 310 Nm (229 lb-ft) @ 6,100 rpm
• Six individual high-butterfly throttle bodies
• Twin-plug ignition
• 110-litre plastic fuel tank
• 5-speed gearbox with oil pump
• Limited-slip differential (80% lock)
• Four-piston 917 brake calipers with cross-drilled discs
• Dual master brake cylinders
• Bilstein Shocks
• 9J and 11J x 15 Fuchs alloy wheels
• Goodyear radial racing tyres

• Steel front and rear RSR flared wheel arches
• Welded chassis reinforcements
• Rear shock tower reinforcements
• Front fibreglass RSR bumper with centre oil cooler
• Rear fibreglass RSR bumper
• Fibreglass whale tail (with Daytona Gurney Flap)
• Fibreglass front hood with balsa reinforcement
• Plexiglass windows
• Windshield clips and rear window straps
• Rear blanking plate instead of Porsche reflector
• Black headlight rings, cover and driver’s side door mirror

• Three-spoke Sport steering wheel
• Lightweight Recaro racing seats
• Lightweight door panels with release strap
• Black headliner and needle felt carpets
• No sound deadening
• Clock and radio blanking plates
• 10,000 rpm tachometer

• Rear roll hoop
• Racing seat harness
• Heinzmann fire extinguisher system

After the 1973-74 IROC series, all sixteen cars were individually sold by Penske to privateer drivers and collectors and continue today to occupy a unique part of Porsche racing history.

We are delighted to offer for sale this famous race-winning example, which has been authentically preserved and remains fitted its original numbered (684006) type 911/74 RSR engine, which was fully overhauled by Porsche Centre Melbourne in 2014 and used sparingly since.

This immensely historic Porsche is offered for sale with all UK duties paid / or can be made available for immediate export.

For further infomation please call +44 (0) 1787 477 749
or click here to email for an enquiry



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