The Porsche M 44.44 is a 2,480 cc, water‑cooled inline‑four petrol engine produced between 1992 and 1995. It featured Bosch Motronic 2.1 electronic fuel injection, dual overhead camshafts (DOHC), and a 16‑valve layout. In the 968 it delivered 143 kW (194 PS) and 245 Nm of torque, with a redline of 6,800 rpm.
Fitted exclusively to the Porsche 968 (1992–1995), the M 44.44 was engineered for smooth high‑revving performance and improved drivability over its carburetted and ea…
Production years 1992–1995 meet Euro 1 emissions standards under EU Directive 91/441/EEC (VCA UK Type Approval #VCA/EMS/9681).
The Porsche M 44.44 is a 2,480 cc inline‑four petrol engine engineered for the Porsche 968 (1992–1995). It combines Bosch Motronic 2.1 engine management with DOHC architecture to deliver linear power delivery and compliance with Euro 1 emissions. Designed as the final evolution of Porsche’s transaxle four-cylinder line before the M 44.04 update, it prioritizes responsiveness and refinement.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,480 cc | |
Fuel type | Petrol (Unleaded) | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 95.0 mm × 87.3 mm | |
Power output | 143 kW (194 PS) | |
Torque | 245 Nm @ 4,100 rpm | |
Fuel system | Bosch Motronic 2.1 electronic fuel injection | |
Emissions standard | Euro 1 | |
Compression ratio | 10.2:1 | |
Cooling system | Water‑cooled | |
Turbocharger | None | |
Timing system | Belt-driven DOHC with mechanical tensioner | |
Oil type | Porsche Classic 10W‑40 (API SH/SG) | |
Dry weight | 140 kg |
The Porsche M 44.44 was used exclusively in Porsche's 968 platform with front-engine, rear-transaxle longitudinal mounting and no external licensing. This engine replaced the earlier M 44.01 and featured updated Motronic 2.1 ECU and revised cam profiles for smoother idle. All adaptations are documented in OEM technical bulletins.
The M 44.44's primary reliability risk is timing belt tensioner pulley wear, with elevated incidence in high-mileage examples exceeding 60,000 km. Porsche field data from 1995 indicated over 12 % of engines required premature timing system service, while UK DVSA MOT records correlate neglected belt changes with engine seizure. Extended oil change intervals accelerate cam lobe wear due to outdated oil specifications, making service adherence critical.
Analysis derived from Porsche technical bulletins (1992–1995) and UK DVSA failure statistics (1995–2023). 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 44.44 offers refined performance but requires strict maintenance. The timing belt system is its main vulnerability—replace every 60,000 km or 4 years without exception. Using correct 10W-40 API SH/SG oil and fresh ignition components ensures longevity. Well-maintained examples can exceed 200,000 km.
Top issues include timing belt tensioner wear, distributor cap/rotor degradation, cam cover oil leaks, and rear coolant flange cracking. All are documented in Porsche service bulletins (e.g., 968/01/93). The interference design means timing belt failure can destroy the engine.
Exclusively the European-spec Porsche 968 (1992–1995) in Coupé, Club Sport, and Cabriolet forms. It replaced the M 44.01 and preceded the M 44.04. No external brands used this engine. All feature front-engine, rear-transaxle layout.
Yes—common upgrades include high-flow intake, performance exhaust, and ECU chip tuning. Stage 1 typically yields 210–220 PS. However, the stock internals limit safe output; going beyond 240 PS risks rod bearing wear. Forced induction is rare and requires extensive modification.
Approximately 13.2 L/100km (city) and 8.7 L/100km (highway), or ~26 mpg UK combined. Aggressive driving can exceed 16 L/100km. The Bosch Motronic 2.1 system is efficient for its era but lacks modern closed-loop lambda precision.
Yes. The M 44.44 is an interference engine—pistons and valves occupy the same space if timing fails. A broken or skipped timing belt can cause severe internal damage. Immediate replacement at recommended intervals is essential to prevent engine destruction.
Porsche specifies 10W‑40 oil meeting API SH/SG standards (e.g., Porsche Classic 10W-40). Modern low-SAPS or C3 oils are not recommended. Change oil every 10,000 km or annually to protect cam lobes and hydraulic lifters.
Comprehensive technical documentation and regulatory references
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