1972 Porsche 911 Carrera RS 2.7 development prototype
- Engine
- 2.7L flat-six with Bosch mechanical fuel injection, ~210 bhp (prototype unit)
- Colour
- Fluorescent yellow
Chassis 9112301609 is a 1972 Porsche 911 S 2.4 'oil flap' coupe that was acquired by Porsche's factory development department at Weissach and fitted with one of the earliest prototype 2.7-litre flat-six engines and a prototype ducktail spoiler, making it a direct precursor to the iconic 911 Carrera RS 2.7. Sold in 1973 to an engineer with connections to Porsche's development chief, the car subsequently spent several years in Algeria before passing to a Stuttgart collector who commissioned a full restoration to its original development-era specification. It represents a rare and documented link to the earliest phase of Carrera RS conception.
Ownership
- —Auction saleEstimate US$700,000 – US$900,000
- —Auction saleSold US$758,500
- 1972-06-01 → 1973-09-01Factory deliveryPorsche AG factory development departmentfull documentation
Vehicle acquired for prototype testing at Weissach; fitted with an early 2.7-litre flat-six and a prototype ducktail spoiler during this period.
- 1973-09-18 → 2016Private saleFranz Sussnerfull documentation
Neckarsulm-based engineer who reportedly had a personal connection to Porsche development chief Helmuth Bott; drove the car in Algeria until 1976, later had it repainted red and fitted with a whale-tail spoiler, retaining the original ducktail in storage. Held the car for approximately 43 years.
- 2016 →Private saleStuttgart-based Porsche collectorpartial documentation
Commissioned a full restoration returning the car to its development-era appearance, including original yellow paint, ducktail spoiler, and pre-series cabin instruments; engaged Kadach in Winnenden to rebuild the 2.7-litre engine.
Competition
No competition history extracted from the catalogue.
Maintenance & restoration
- 1972ModificationPorsche development department, Weissach
Porsche's development department fitted the 911 S 2.4 shell with a prototype 2.7-litre flat-six engine, an early ducktail spoiler, and a supplementary instrument panel below the dashboard including gauges for amperage, oil pressure, and oil temperature, plus a communication radio.
Work carried out as part of the factory's engineering development programme for what would eventually become the 911 Carrera RS 2.7.
- 1977Bodywork
Following the expiry of his registration exemption, Sussner had the car repainted from fluorescent yellow to red, replaced the prototype ducktail spoiler with a later whale-tail design, and had Bosch driving lights installed. The original prototype spoiler was kept in storage.
The colour change was required because fluorescent yellow was only permitted for official vehicles under the original dispensation granted by the Regional Council of Stuttgart.
- —RestorationKadach, Winnenden
German marque specialists restored the car to its immediate post-development appearance, reinstating the fluorescent yellow paintwork, the original prototype ducktail spoiler, Carrera side script, and the original pre-series instrument cluster beneath the dashboard. The 2.7-litre engine was rebuilt by Kadach and the Bosch fuel-injection pump was overhauled by a dedicated specialist.
Restoration commissioned by the Stuttgart collector who acquired the car in 2016. A production-style Carrera RS decal was added below the spoiler, though period photographs do not conclusively confirm this was an original feature.
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