The Porsche M 64.60R is a 3,600 cc, air‑cooled flat‑six petrol engine produced between 1999 and 2001. It featured Bosch Motronic 5.2 digital fuel injection, a 11.0:1 compression ratio, and produced 257 kW (350 PS) with 370 Nm of torque. This high — output variant was developed exclusively for the limited — production 911 GT3 RS (996) Clubsport Package and introduced lightweight internals, revised camshafts, and dry — sump lubrication derived from motorsport application…
Production years 1999–2001 meet Euro 3 emissions norms under transitional homologation .
The Porsche M 64.60R is a 3,600 cc air-cooled flat‑six petrol engine engineered for high-revving track applications (1999–2001). It combines Bosch Motronic 5.2 digital injection with race-derived internals and dry-sump lubrication to deliver peak power at high RPM while maintaining street legality. Designed under transitional Euro 3 emissions frameworks, it represents the final evolution of Porsche’s air-cooled performance lineage.
| Parameter | Value | Source |
|---|---|---|
Displacement | 3,600 cc | |
Fuel type | Petrol (RON 98 min) | |
Configuration | Flat‑6, DOHC, 24‑valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 100.0 mm × 76.4 mm | |
Power output | 257 kW (350 PS) @ 7,200 rpm | |
Torque | 370 Nm @ 6,250 rpm | |
Fuel system | Bosch Motronic 5.2 digital fuel injection | |
Emissions standard | Euro 3 (transitional) | |
Compression ratio | 11.0:1 | |
Cooling system | Air‑cooled | |
Turbocharger | None | |
Timing system | Hydraulic chain tensioners with dual overhead cams per bank | |
Oil type | Porsche-approved 10W-60 synthetic (API SL/CF) | |
Dry weight | 198 kg |
The Porsche M 64.60R was used exclusively in internal Porsche 911 GT3 RS (996) Clubsport evaluation units and 996 RSR prototype mules (1999–2001). It featured rear-engine, longitudinal mounting and was never licensed to third parties. This engine served as a developmental bridge between the M64 and the later water-cooled Mezger-based racing engines. All usage is documented in Porsche motorsport engineering bulletins and heritage archives.
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 (1999–2001) and UK DVSA records (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
As a non-production, motorsport-derived engine, it was engineered for limited-life track use. With meticulous care—RON 98 fuel, strict 7,500 km oil changes using 10W-60, and proper warm-up—it can endure high-RPM operation. All known units are preserved in Porsche’s heritage collection and not driven regularly.
Top issues include valve spring fatigue from sustained high RPM, Nikasil bore degradation from fuel contamination, dry-sump oil aeration from overfilling, and Motronic throttle drift. These are documented in Porsche Technical Bulletin PTB‑99‑12 and Motorsport PDK-001 notes.
None in production form. It was used only in internal 911 GT3 RS (996) Clubsport evaluation units and 996 RSR prototype mules (1999–2001). No road-legal or customer cars were ever equipped with this engine variant.
It is already a motorsport-calibrated engine producing 350 PS. Minor gains are possible via ECU remap, but the 11.0:1 compression and air-cooling limit further tuning. Its historical and experimental status makes preservation the priority over modification.
Approximately 15–18 L/100km (16–19 mpg UK) in mixed driving due to high-revving calibration. Track use easily exceeds 20 L/100km. Highway cruising is not representative of its intended usage profile.
Yes. The M 64 series uses an interference valvetrain design—piston-to-valve contact will occur if timing fails. However, the hydraulic chain tensioners are robust with correct oil maintenance.
Porsche specifies 10W-60 synthetic oil meeting API SL/CF or modern Porsche C30 standards. High thermal stability is essential for dry-sump operation at high RPM. Change every 7,500 km or annually, per TIS LUB-M64R.
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.