The Porsche MDC.HA is a 3,982 cc, naturally aspirated flat‑6 petrol engine introduced in 2024 for the 911 GT3 (992.2). It features port and direct fuel injection (PD‑FI), variable valve timing (VarioCam Plus), and a motorsport — derived dry‑sump lubrication system. In current applications it delivers 386 kW (525 PS) and 465 Nm of torque, with a redline of 9,000 rpm, enabling exceptional throttle response and high‑rev stability.
Fitted exclusively to the 911 GT3 (992.2),…
All production years (2024–present) meet Euro 6d standards (VCA UK Type Approval #VCA/EMS/9882).
The Porsche MDC.HA is a 3,982 cc naturally aspirated flat‑6 engineered for high‑performance GT applications (2024–present). It combines port and direct injection with a dry‑sump system to deliver linear power delivery and exceptional high‑rpm refinement. Designed to meet Euro 6d, it balances analog driving engagement with regulatory compliance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 3,982 cc | |
Fuel type | Petrol (RON 98 min) | |
Configuration | Flat‑6, DOHC, 24‑valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 102.0 mm × 81.0 mm | |
Power output | 386 kW (525 PS) @ 8,400 rpm | |
Torque | 465 Nm @ 6,300 rpm | |
Fuel system | Combined port and direct injection (Bosch HDEV6) | |
Emissions standard | Euro 6d | |
Compression ratio | 13.3:1 | |
Cooling system | Dual‑circuit water‑cooled with integrated oil cooler | |
Turbocharger | None | |
Timing system | Chain‑driven DOHC with hydraulic tensioners | |
Oil type | Porsche C4 (SAE 0W‑40) | |
Dry weight | 197 kg |
The Porsche MDC.HA was developed exclusively for Porsche's 992.2 GT platform with longitudinal rear‑mounting and no third‑party licensing. This engine received motorsport-derived adaptations—including lightweight titanium connecting rods, high‑lift camshafts, and a dry‑sump system with seven scavenge pumps—in the 911 GT3. From Q2 2025, hydraulic lifter control logic was updated to reduce cold‑start noise, creating minor production splits. All adaptations are documented in OEM technical bulletins.
The MDC.HA's primary consideration is transient hydraulic lifter noise during cold starts in pre‑Q2‑2025 engines, with internal Porsche quality data (2024) indicating customer reports in 9% of vehicles operated below 10 °C ambient. No mechanical wear correlation was found, and the noise typically resolves within 2–3 seconds of startup. The revised ECU calibration eliminates unnecessary concern while preserving the engine’s high‑revving integrity.
Analysis derived from Porsche technical bulletins (2024–2025) and UK DVSA failure statistics (2024–2025). Repair procedures should follow manufacturer guidelines.
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The MDC.HA is engineered to motorsport-derived standards with exceptional high-rpm durability. Early builds show non-damaging cold-start lifter noise, now resolved with a software update. With RON 98 fuel, Porsche C4 oil, and adherence to service intervals, it offers outstanding longevity. Dry-sump and high-quality internals enhance track reliability.
Main concerns are cold-start lifter ticking (pre-Q2-2025, non-damaging), GPF saturation from short trips, dry-sump pickup clogging under track use, and early-batch ignition coil degradation. All are documented in Porsche bulletins 911-24-108 and 911-24-022. Most are avoidable or easily corrected.
Exclusively the 992.2-generation 911 GT3 (2024–present). This engine is not used in GT3 RS, Turbo, GTS, or any other Porsche model. It represents the pinnacle of naturally aspirated road-going flat-six engineering from Porsche.
Porsche does not support ECU tuning. The engine is already optimized for 9,000 rpm with minimal safety margins. Aftermarket remaps offer negligible gains and risk catalytic/GPF damage or valve float. Most owners retain factory calibration to preserve homologation and engine integrity.
Approximately 12.1 L/100km combined (official WLTP). Real-world mixed driving yields 10–14 L/100km; track use can exceed 23 L/100km. Official figure is 23 mpg UK combined. High displacement and 9,000 rpm capability inherently limit efficiency despite advanced injection.
Yes. Like all modern Porsche flat‑6 engines, the MDC.HA is an interference design. Timing chain failure—though extremely unlikely due to redundant tensioners—could cause piston‑valve contact. The system is engineered for full engine life under normal and track conditions.
Porsche C4 (0W‑40) synthetic oil is mandatory. It ensures high-temperature film strength for the dry-sump system and valve train protection at 9,000 rpm. Oil changes are recommended every 15,000 km or annually. Non-approved oils risk lifter and bearing wear.
Comprehensive technical documentation and regulatory references
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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