The original lightweight RS — the homologation 911 that gave every later Porsche RS its name.
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Built for Group 4 homologation, the 1973 Carrera RS 2.7 was the first 911 to wear the RS badge. The original homologation target was 500 cars; demand pushed production to 1,580 across four sub-variants: M471 Sport ('Lightweight'), M472 Touring, RSH and RSR. The lightweight Sport at 960 kg, with thinner steel, no rear seats and minimal sound deadening, is the apex collector derivative.
The 2.7 RS anchors the entire air-cooled Porsche market and is the touchstone for every later 911 RS, GT3 RS and 911 R derivative.
The 2.7 RS is the foundation of every Porsche RS that followed; values are driven by sub-variant, originality and Porsche Kardex documentation.
| Variant | Years | Production | Notes |
|---|---|---|---|
| M471 Sport (Lightweight) | 1972–1973 | 200 | Thinner steel, plastic bumpers, no rear seats, minimal sound deadening; the apex. |
| M472 Touring | 1972–1973 | 1,308 | Standard 911 S interior trim; majority of production. |
| M491 RSH | 1973 | 17 | Homologation specification, road-registered with race specification. |
| M491 RSR | 1973 | 55 | Full competition specification on RS base. |
Start with identity, paperwork and originality. For the Porsche 911 Carrera RS 2.7, the strongest cars have a continuous ownership file, matching numbers where applicable, original manuals, invoices and evidence of work by recognised marque specialists. Porsche Kardex / Certificate of Authenticity, matching numbers, sub-variant (M471/M472/RSH/RSR), original colour and continuous documented history are decisive.
The 2.7-litre flat-six is robust when correctly assembled; head studs and case condition are central, as is mechanical fuel injection calibration. A proper pre-purchase inspection includes cold-start behaviour, leak-down or compression testing where appropriate, underbody photography, suspension and chassis-point inspection, brake condition and a road test long enough to expose heat-related faults. Deferred maintenance is almost always more expensive than buying a better-sorted car.
Use a paint-depth gauge, lift access and a specialist familiar with the model's factory seams and panel gaps. Collector value is dramatically affected by structural repairs, poor paintwork, corrosion, incorrect panels and missing factory trim. Documented cosmetic restoration is acceptable; concealed accident repair must be priced severely.
M471 'Lightweight' cars are the collector apex; M472 Touring cars are more usable but trade at a clear discount; RSH and RSR cars are separate ultra-blue-chip tiers. Specification, colour, transmission and limited-build variants move values significantly. Buy the best-documented example in the most desirable specification you can justify rather than a tired example of a rarer derivative that will need years of corrective work.
Regional ranges authored independently — each reflects its local market, not an FX conversion
Budget annually even if the car is used sparingly. Fluids age, tyres date out, fuel systems suffer from ethanol, batteries fail and stored cars need exercise. A documented maintenance rhythm protects both reliability and resale value.
Air-cooled 911 specialists with documented RS experience are mandatory; sub-variant trim, body panels (thinner steel on Sport) and decals are not interchangeable. Before purchase, confirm parts availability for model-specific trim, suspension, fuel system, electronics and engine components. A cheap car waiting on unobtainable parts is rarely cheap in collector ownership.
Each region quoted in its local currency — independent market readings, not FX conversions
2.7 RS values have settled at high levels with sub-variant pricing well established: M471 commands a clear premium over M472, and RSH/RSR cars trade in their own market. COA and continuous history are now standard expectations.
| Date | Auction | Car | Mileage | Result |
|---|---|---|---|---|
| 2025-08-16 | RM Sotheby's Monterey | 1973 911 Carrera RS 2.7 M472 Touring | — | $1,242,500 Sold |
| 2025-02-01 | Gooding & Co. Amelia Island | 1973 911 Carrera RS 2.7 M471 Lightweight | — | $2,150,000 Sold |
| 2024-05-25 | RM Sotheby's Monaco | 1973 911 Carrera RS 2.7 M472 Touring | — | €1,055,000 Sold |
The 2.7 RS is a permanent fixture of air-cooled Porsche collecting. M471 Lightweight and RSH/RSR cars should continue to lead; M472 Touring values track condition and Porsche COA documentation.
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