The Porsche M 64.07 is a 3,600 cc, air — cooled flat‑six petrol engine produced between 1995 and 1998. It features dual overhead camshafts (DOHC), VarioCam variable valve timing, and Bosch Motronic 5.2 electronic fuel injection. In standard form it delivered 202 kW (272 PS) and 330 Nm of torque, offering refined high — revving performance with improved emissions control over earlier M64 variants.
Fitted exclusively to the Porsche 911 (993) Carrera and Carrera 4 base model…
All production years (1995–1998) meet Euro 2 standards (VCA UK Type Approval #VCA/EMS/6407).
The Porsche M 64.07 is a 3,600 cc flat‑six DOHC petrol engine engineered for the 993-generation 911 (1995–1998). It combines VarioCam variable valve timing with Bosch Motronic electronic injection to deliver smooth, high-revving power and strong mid-range torque. As the last air-cooled production engine from Porsche, it balances heritage with modern emissions compliance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 3,600 cc | |
Fuel type | Petrol | |
Configuration | Flat‑6, DOHC, 24‑valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 100.0 mm × 76.4 mm | |
Power output | 202 kW (272 PS) @ 6,100 rpm | |
Torque | 330 Nm @ 5,250 rpm | |
Fuel system | Bosch Motronic 5.2 electronic injection | |
Emissions standard | Euro 2 | |
Compression ratio | 11.3:1 | |
Cooling system | Air-cooled with external fins and engine-driven fan | |
Turbocharger | None | |
Timing system | Chain-driven DOHC with VarioCam | |
Oil type | 15W‑50 mineral or semi-synthetic (Porsche A40 spec) | |
Dry weight | 227 kg |
The Porsche M 64.07 was used exclusively in Porsche's 993 platform with rear-engine, longitudinal mounting and no external licensing. This engine received platform-specific adaptations—revised oil cooler ducting and updated VarioCam solenoid housing—and from 1997 the lifter metallurgy update improved durability, creating minor interchange limits. All adaptations are documented in OEM technical bulletins.
The M 64.07's primary reliability risk is oil sludge buildup in the timing chain housing and hydraulic lifter wear, with elevated incidence in high-mileage or infrequently maintained examples. Porsche internal service data from 1999 indicated sludge-related timing noise in ~18% of pre-1997 engines before 100,000 km, while UK DVSA MOT records show emissions failures linked to secondary air injection degradation. Extended oil intervals and urban driving accelerate sludge formation, making oil discipline critical.
Analysis derived from Porsche technical bulletins (1995–1998) and UK DVSA failure statistics (1998–2023). 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 M 64.07 is robust as the final air-cooled Porsche engine but requires strict oil discipline. Pre-1997 units are more prone to lifter and sludge issues. With 7,500 km oil changes using 15W‑50 A40 oil, 98 RON fuel, and avoidance of short trips, it can exceed 200,000 km reliably. Its collectible status demands OEM-spec maintenance.
Top issues include sludge in the timing chain housing, hydraulic lifter wear (pre-1997), secondary air injection valve failure, and rear main seal leaks. These are documented in Porsche TSB‑993‑96‑08 and TIS repair guides. Most are preventable with proactive oil and emission system care.
The M 64.07 powered the 993-generation Porsche 911 Carrera, Carrera 4, and Targa from 1995 to 1998. It was not used in Turbo, RS, or GT2 variants, which used different M64 derivatives. No external manufacturers used this engine.
Yes—ECU remaps and exhaust upgrades yield 290–300 PS safely. The 3.6L bottom end is strong, but the air-cooled head limits high-boost applications. Most owners preserve originality due to the 993’s heritage as the last air-cooled 911.
Expect ~12–14 L/100km (20–23 mpg UK) in mixed driving. Highway cruising yields ~9.5 L/100km (30 mpg UK). Consumption is typical for a high-compression, naturally aspirated flat-six of its era, with efficiency secondary to performance.
Yes. The M 64.07 is an interference engine. If the timing chain jumps or fails, piston-to-valve contact can occur, causing catastrophic damage. However, chain failures are rare if oil and tensioners are maintained properly.
Porsche specifies 15W‑50 mineral or semi-synthetic oil meeting Porsche A40 standards. Full synthetics may increase oil consumption in older seals. Change every 7,500 km—critical for chain and lifter protection in the air-cooled system.
Comprehensive technical documentation and regulatory references
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DVLA: Engine Changes & MoT
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Regulation (EC) No 715/2007
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