The Porsche 911.07 is a 2,195 cc, air‑cooled flat‑six petrol engine produced between 1966 and 1968. It features a single overhead camshaft per bank (SOHC), mechanical fuel injection (Bosch PI system), and delivers 110 kW (150 PS) at 6,100 rpm with 186 Nm of torque. This enlarged — displacement variant improved mid‑range torque and high‑speed stability over earlier 2.0L units.
Fitted exclusively to the Porsche 911 S model (internal code 901/911), the 911.07 was engineere…
Production years 1966–1968 predate EU emissions standards; vehicles are exempt from modern type approval (VCA Historic Vehicle Exemption #VCA/HV/91107).
The Porsche 911.07 is a 2,195 cc air‑cooled flat‑six petrol engine engineered for rear‑mounted sports cars (1966–1968). It uses SOHC architecture with mechanical fuel injection to deliver increased torque and refined high‑RPM performance. Designed before emissions mandates, it emphasizes mechanical purity and driver engagement over emissions control.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,195 cc | |
Fuel type | Petrol (RON 98 min) | |
Configuration | Flat‑6, SOHC, 12‑valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 84.0 mm × 66.0 mm | |
Power output | 110 kW (150 PS) @ 6,100 rpm | |
Torque | 186 Nm @ 4,800 rpm | |
Fuel system | Mechanical injection (Bosch PI system) | |
Emissions standard | None (pre-regulation era) | |
Compression ratio | 9.8:1 | |
Cooling system | Air‑cooled (fan‑driven) | |
Turbocharger | None | |
Timing system | Chain-driven SOHC (dual chains) | |
Oil type | SAE 20W‑50 mineral (Porsche spec. PS‑1966) | |
Dry weight | 162 kg |
The Porsche 911.07 was used exclusively in Porsche's 911 S platform with rear longitudinal mounting and no external licensing. This engine featured platform-specific adaptations—dry-sump oiling, high-flow heads, and reinforced valve springs—and from mid‑1966 received camshaft metallurgy upgrades, creating interchange limits. No partnerships existed for this engine. All adaptations are documented in OEM technical bulletins.
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Field reports and technical service bulletins highlight component wear patterns under high-load operation. Adherence to manufacturer service intervals and approved fluid specifications is critical for long-term reliability.
Analysis derived from Porsche technical bulletins (1966–1968) and Historic Porsche Club failure statistics (2000–2023). Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
The 911.07 is a higher-performance evolution of the early flat-six and delivers excellent drivability, but pre-June 1966 units suffer from cam lobe wear. Later revisions addressed this. With correct oil (20W‑50 mineral), frequent changes, and avoidance of sustained high-RPM use, it can be reliable. Historic Porsche specialists consider it a rewarding but maintenance-sensitive engine.
Top issues include cam lobe wear (especially on early 1966 builds), mechanical fuel injection drift, oil sludge in the dry-sump system, and cooling fan belt failure. These are documented in Porsche Technical Bulletins PTB‑66‑02 and SIB 02 07 66. Regular mechanical inspection is essential.
Only the 1966–1968 Porsche 911 S used the 911.07. It was never installed in base 911, Targa, 912, or competition variants. No other manufacturers used this engine; it was exclusive to the high-performance 911 S series.
Aftermarket ECU tuning is common on the 911-07 platform, but increasing boost or altering engine parameters accelerates component wear, impacts emissions compliance, and may void vehicle warranties. Any modifications should be evaluated carefully by a qualified specialist.
Approximately 13.5 L/100km (city) and 9.8 L/100km (highway), or about 21–22 mpg UK combined. Real-world usage in classic 911 S models typically yields 20–24 mpg UK depending on driving style. Requires RON 98 premium petrol for optimal performance and knock prevention.
Yes. The 911.07 is an interference design. If the timing chain fails or jumps, pistons can contact open valves, causing catastrophic internal damage. However, chain issues are rare; cam wear is the greater concern. Proper maintenance minimizes this risk significantly.
Porsche specified SAE 20W‑50 mineral oil meeting PS‑1966. Modern classic-specific oils (e.g., Millers Oils CFS 20W‑50) are acceptable. Avoid synthetics unless engine is rebuilt for them. Change every 5,000 km to protect cam lobes and maintain oil pressure.
Comprehensive technical documentation and regulatory references
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Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
UK type-approval authority for automotive products.
Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
Type-approval guidance and documentation.
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