The Porsche 930.09 is a 3,299 cc, air — cooled flat‑six turbocharged petrol engine produced between 1975 and 1989. It features a single KKK turbocharger, Bosch K — Jetronic mechanical fuel injection, and an air — cooled crankcase with oil — cooled cylinder heads. Output ranged from 221 kW (300 PS) to 235 kW (320 PS) in the 1989 “Turbo S” variant, delivering strong mid — range thrust and a distinct lag — heavy powerband characteristic of early turbo systems.
Fitted exclusively t…
Production years 1975–1983 meet EU Directive 70/220/EEC (Euro pre-1); 1984–1989 models comply with revised EU emissions thresholds and US EPA standards depending on market .
The Porsche 930.09 is a 3,299 cc air-cooled flat-six turbocharged petrol engine engineered for high-performance GT applications (1975–1989). It combines Bosch K-Jetronic mechanical fuel injection with a single KKK turbocharger to deliver dramatic boost-driven torque and high-speed stability. Designed to meet pre-Euro and transitional EU emissions standards, it balances analog driving feel with period-appropriate emissions control.
| Parameter | Value | Source |
|---|---|---|
Displacement | 3,299 cc | |
Fuel type | Petrol (RON 98 minimum recommended) | |
Configuration | Flat‑6, OHC, 12‑valve | |
Aspiration | Turbocharged (KKK K27) | |
Bore × stroke | 100.0 mm × 70.4 mm | |
Power output | 221–235 kW (300–320 PS) @ 5,500–5,800 rpm | |
Torque | 412–450 Nm @ 4,000–4,500 rpm | |
Fuel system | Bosch K-Jetronic mechanical continuous injection | |
Emissions standard | EU Directive 70/220/EEC (pre-1984); Euro pre-1 / US EPA (1984–1989) | |
Compression ratio | 7.0:1 | |
Cooling system | Air-cooled block, oil-cooled heads | |
Turbocharger | Single KKK K27 (water-cooled CHRA post-1986) | |
Timing system | Gear-driven intermediate shafts (no timing belt/chain) | |
Oil type | SAE 15W-50 synthetic (Porsche A40 spec) | |
Dry weight | 232 kg |
The Porsche 930.09 was used exclusively in the Porsche 930 platform with rear-engine, longitudinal mounting and no external licensing. This engine received platform-specific adaptations—revised intercoolers in 1978 and upgraded turbo housings in 1986—and from 1989 the 964 Turbo adopted the 3.3L M30/69 variant, ending 930.09 production. No partnerships existed for this engine. All adaptations are documented in OEM technical bulletins.
Engine Finders UK Ltd, which operates EngineCode.uk, can pass your enquiry to engine suppliers in the UK. The service is for vehicles in the United Kingdom, with UK delivery or fitting. This is a commercially connected service, and sending an enquiry does not confirm diagnosis or compatibility.
Diagnostic reminder: If a technician has recommended replacing the engine, you can send an enquiry to engine suppliers in the UK. Confirm the diagnosis first: an engine-code record does not diagnose a fault.
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 (1978–1989) and UK DVSA historic MOT failure statistics (1990–2020). 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 930.09 offers thrilling performance but demands disciplined maintenance. Early models (1975–1985) are prone to turbo and fuel system issues, while post-1986 revisions improved durability. With correct oil, cooldown discipline, and K-Jetronic maintenance, it can be reliable. Many well-kept examples exceed 150,000 km.
Top issues include turbo bearing failure from thermal shock, K-Jetronic calibration drift, exhaust manifold cracks, and cylinder head stud pull. All are documented in Porsche TSBs. Oil coking and rich running are frequent in neglected examples.
Exclusively the 911 Turbo (930) from 1975 to 1989, including the 1989 Turbo S. It was never used in non-930 models or licensed externally. The 964 Turbo (1990+) uses the updated M30/69 engine.
Aftermarket ECU tuning is common on the 930-09 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.
Poor by modern standards. Expect 14–16 L/100km (17–20 mpg UK) in mixed driving. Aggressive use can exceed 20 L/100km. High consumption is due to low compression, rich K-Jetronic mixtures, and turbo lag requiring frequent throttle input.
No. The 930.09 is a non-interference (interference-free) flat-six due to its hemispherical combustion chambers and valve timing geometry. If timing gears fail (extremely rare), piston-to-valve contact is unlikely.
Porsche specifies 15W-50 synthetic meeting A40 (or ACEA A3/B4) with high ZDDP content for flat-tappet cam protection. Change every 7,500 km or annually. Avoid low-viscosity oils—they lack film strength for high-load bearings.
Comprehensive technical documentation and regulatory references
EngineCode.uk is operated by Engine Finders UK Ltd. It provides engine-reference information and an optional commercial enquiry service. It is not an official manufacturer website. Check the record's sources and confirm vehicle-specific details before relying on it for parts, repairs or replacement.
Our editorial standard prioritises relevant manufacturer documentation and official regulatory sources. The sources and verification status for a record should be checked alongside the data.
A statement is not verified merely because a source is listed. Where supporting evidence is missing or conflicting, the record should identify that limitation. Please report unsupported or inconsistent information.
Transparency in gaps
A missing or unverified value does not mean the manufacturer has withheld it. We distinguish information not yet verified, information not available to us, and information explicitly not disclosed by the source.
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.
Records are subject to review and correction. Source links, dates and verification notes should be read with the technical information. Our Editorial and Sourcing Policy explains our standards and review process.
Found an error or missing source? Report a problem with this page. Include the field or statement concerned and a supporting source if available. You can also email corrections@enginecode.uk.
Copyright and permissions
Images and other material may be protected by copyright. Attribution does not by itself grant permission to reuse material. If you believe material on this site infringes your rights, contact copyrights@enginecode.uk with the page URL and details of your claim. We will review the material and take appropriate action.
Copyright Concerns
For copyright concerns, email: copyrights@enginecode.uk
Our Privacy Policy explains how Engine Finders UK Ltd uses information from visits, vehicle lookups, enquiries and messages. Our Cookie Policy explains cookies and similar technologies and how to change your choices.
For access, correction, or deletion requests, email: gdpr@enginecode.uk
Trademark Notice
All trademarks, logos, and engine codes are the property of their respective owners. Use on this site is strictly for reference and identification.
Ownership and commercial services
EngineCode.uk is owned and operated by Engine Finders UK Ltd. Alongside our reference content, we offer an optional replacement-engine enquiry service through Engine Finders and may identify relevant services provided by businesses connected with us. These commercial connections are disclosed. Using an enquiry service is not required to read our reference content.
Engine Finders UK Ltd operates this website. Our optional enquiry service has a commercial purpose. Our Ownership and Commercial Disclosure explains the relationship between the reference website and that service. Participating suppliers pay a fee or subscription to participate on the network and receive quote requests.
Use this record as a starting point for identification. Specifications and vehicle applications may contain errors or omissions. Confirm the exact engine variant and compatibility using vehicle-specific documentation and a qualified supplier or technician.
All external links open in new tabs. Please verify current availability of resources.