1972 Porsche 911 Carrera RS 2.7 pre-production prototype
- Engine
- 2.7L flat-six
- Colour
- Signal Yellow
Chassis number 9113600012 is the second of nine factory-retained pre-production Porsche 911 Carrera RS prototypes, built around April 1972 — roughly six months before regular RS 2.7 production commenced. Distinguished from production cars by the absence of a duck-tail spoiler, a 1972-model-year 911 S bodyshell, and various unique specification details, it appeared in the official 1973 model-year sales brochure finished in Signal Yellow. The car was subsequently gifted to Austrian Formula 1 driver Helmuth Koinigg, who was tragically killed at the 1974 US Grand Prix. It passed through several European owners before undergoing a partial restoration in the 1990s, with engine and transmission work completed in Germany and bodywork entrusted to a UK specialist.
Ownership
- —Auction saleSold US$1,325,000
- 1972-04-01 → 1973-09-26Factory deliveryPorsche factorypartial documentation
Retained by Porsche for pre-production testing and journalist rides, wearing a factory registration plate. Appeared in the 1973 model year brochure while in factory hands.
- 1973-09-26 → 1975-02-01Factory deliveryHelmuth Koiniggpartial documentation
Reportedly received as a factory gift, a common arrangement for pre-production cars. Koinigg had the bodywork repainted white shortly after taking delivery. He died in a racing accident in late 1974.
- 1975-02-01 →Private saleHelmut Goldpartial documentation
Based in Austria, Gold used the car extensively including long-distance journeys reportedly reaching Africa. He owned the car for approximately a decade.
- 1990 →Private saleFriedhelm Tangpartial documentation
Collector based in Bonn, Germany.
- 2008 →Private saleJohannes Willenpartpartial documentation
Austrian buyer who acquired the car when it returned to Austria after a period in the United States.
- Date unknownPrivate saleErich Weidenerpartial documentation
Owner based in Memminghem, Germany, who kept the car for roughly five years before passing it on.
- Date unknownPrivate saleChristopher Stahlpartial documentation
Also based in Bonn; initiated a restoration that was left incomplete before the car changed hands again.
- Date unknownPrivate saleDavid Mohlmanpartial documentation
US-based collector who acquired the car mid-restoration and arranged for bodywork at BS Motorsport in Buckinghamshire and a full mechanical rebuild by Manfred Rugen Motorenteknik in Germany.
- Date unknownAcquisition unknownGerman collectorpartial documentation
Current custodian at the time the catalogue was written, based in Germany.
Competition
- 19741974 Le Mans 24 HoursDriver: Helmuth KoiniggDNF — retired in the eighth hour
Koinigg drove a turbocharged Carrera RSR for Porsche at this event; this chassis (0012) was not the race car but Koinigg is mentioned in connection with it as its owner.
- 1974Formula 1 World Championship1974 Canadian Grand PrixDriver: Helmuth Koinigg10th overall
Described as Koinigg's second Formula 1 start, competing for the Surtees team; this chassis was not the race vehicle but the result is documented in connection with its owner.
- 1974Formula 1 World Championship1974 United States Grand PrixDriver: Helmuth KoiniggDNF — fatal accident on lap 10
Koinigg was killed in a crash at Watkins Glen during this race; again the chassis itself was not the race vehicle but the event is documented as part of the first private owner's history.
Maintenance & restoration
- 1973Bodywork
Car repainted from Signal Yellow to white by or at the direction of first private owner Helmuth Koinigg shortly after he took delivery.
- —Restoration
A restoration was initiated by owner Christopher Stahl but left incomplete when the car was sold mid-process.
- —BodyworkBS Motorsport
Remaining bodywork and general restoration work carried out at BS Motorsport following acquisition by David Mohlman, continuing the previously started restoration.
Workshop located in Westcott, Buckinghamshire, UK.
- —Engine rebuildManfred Rugen Motorenteknik
Engine and gearbox were fully rebuilt by a German specialist during the same restoration phase overseen by David Mohlman.
Workshop located in Hepstedt, Germany.
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