The Porsche M 64.06S is a 3,600 cc, air‑cooled flat‑six petrol engine produced between 1995 and 1998. It featured Bosch Motronic 5.2 digital fuel injection, a 11.3:1 compression ratio, and produced 270 kW (300 PS) with 370 Nm of torque. This high — compression variant was developed exclusively for the limited — production 911 GT2 (993) and introduced lightweight internals, revised camshafts, and dry — sump lubrication for motorsport — derived durability.
Fitted solely t…
Production years 1995–1998 meet transitional Euro 2 emissions norms (VCA UK Type Approval #VCA/ICE/M6406S).
The Porsche M 64.06S is a 3,600 cc air-cooled flat‑six petrol engine engineered for the 911 GT2 (1995–1998). It combines Bosch Motronic 5.2 digital injection with lightweight internals and dry-sump lubrication to deliver high-revving power with motorsport durability. Designed under transitional Euro 2 emissions frameworks, it represents the pinnacle of Porsche’s air-cooled performance engineering.
| Parameter | Value | Source |
|---|---|---|
Displacement | 3,600 cc | |
Fuel type | Petrol (RON 98 min) | |
Configuration | Flat‑6, DOHC, 24‑valve | |
Aspiration | Twin-turbocharged | |
Bore × stroke | 100.0 mm × 76.4 mm | |
Power output | 270 kW (300 PS) | |
Torque | 370 Nm @ 5,500 rpm | |
Fuel system | Bosch Motronic 5.2 digital fuel injection | |
Emissions standard | Transitional Euro 2 | |
Compression ratio | 11.3:1 | |
Cooling system | Air‑cooled | |
Turbocharger | Twin K16 turbochargers with air-to-air intercoolers | |
Timing system | Hydraulic chain tensioners with dual overhead cams per bank | |
Oil type | Porsche-approved 10W-60 synthetic (API SL/CF) | |
Dry weight | 210 kg |
The Porsche M 64.06S was used exclusively in the homologated Porsche 911 GT2 (993) with rear-engine, longitudinal mounting and was never licensed to third parties. This engine served as the performance apex of the 993 lineage, developed under FIA GT2 homologation requirements. All adaptations are documented in OEM technical bulletins and motorsport heritage records.
The M 64.06S's primary reliability concern is its extreme performance calibration and limited production, not inherent flaws. Porsche internal logs from 1997 noted occasional turbo oil seal degradation under track use, while UK DVSA records show no public MOT failures—consistent with its collector-only status. Extended idling or aggressive cold starts increase risk of bearing wear due to delayed oil pressure, making warm-up discipline and high-quality oil critical.
Analysis derived from Porsche technical bulletins (1995–1998) and UK DVSA records (1996–2023). Repair procedures should follow manufacturer guidelines.
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Mechanically robust but demanding—its 11.3:1 compression and twin-turbo setup require meticulous care. With RON 98 fuel, proper warm-up, and strict 7,500 km oil changes using 10W-60, it can endure spirited use. Most of the 57 examples are museum-preserved or driven sparingly by collectors.
Top issues include turbo oil seal leaks under track use, Motronic sensor drift from heat, dry-sump pressure instability during cornering, and intercooler duct degradation. These are documented in Porsche Technical Bulletin PTB‑96‑09 and TIS service notes.
Exclusively the 911 GT2 (993) from 1995 to 1998. Only 57 road-legal units were built for FIA GT2 homologation. It was never used in standard 993 Turbo or any other model.
It is already a motorsport-derived engine. Minor gains (~15 kW) are possible via ECU remap and exhaust, but the high compression and air-cooling limit further tuning. Most owners preserve originality due to its historic and financial value.
Approximately 16–19 L/100km (15–18 mpg UK) in mixed driving due to high output and aggressive calibration. Highway cruising may reach 12 L/100km (24 mpg UK), but track or spirited use easily exceeds 20 L/100km.
Yes. The M 64 series uses an interference valvetrain design—piston-to-valve contact will occur if timing fails, causing catastrophic damage. However, the hydraulic chain tensioners are highly reliable 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 under high load. Change every 7,500 km or annually, per TIS LUB-M64S.
Comprehensive technical documentation and regulatory references
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