The Porsche MDG.GA is a 4,194 cc, naturally aspirated flat‑6 petrol engine introduced in 2024 for the 911 S/T (992.2). It features port and direct fuel injection (PD‑FI), variable valve timing (VarioCam Plus), and a lightweight dry‑sump lubrication system derived from motorsport applications. In current applications it delivers 386 kW (525 PS) and 465 Nm of torque, with a redline of 8,400 rpm, blending track‑ready responsiveness with analogue driving engagement.
Fit…
All production years (2024–present) meet Euro 6d standards .
The Porsche MDG.GA is a 4,194 cc naturally aspirated flat‑6 engineered for high‑revving, driver‑focused applications (2024–present). It combines port and direct injection with a lightweight dry‑sump system to deliver linear power and exceptional throttle fidelity. Designed to meet Euro 6d, it balances emissions compliance with raw mechanical engagement in the 911 S/T platform.
| Parameter | Value | Source |
|---|---|---|
Displacement | 4,194 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 oil cooler | |
Turbocharger | None | |
Timing system | Chain‑driven DOHC with hydraulic tensioners | |
Oil type | Porsche C4 (SAE 0W‑40) | |
Dry weight | 193 kg |
The Porsche MDG.GA was developed exclusively for Porsche's 992.2 S/T platform with longitudinal rear‑mounting and no third‑party licensing. This engine received motorsport-derived adaptations—including lightweight forged pistons, high‑lift camshafts, and a dry‑sump system with reduced oil capacity for weight savings—in the limited‑edition 911 S/T. From Q3 2024, valve springs were upgraded to a resonance‑damped variant, creating minor production splits. All adaptations are documented in OEM technical bulletins.
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The MDG.GA's primary reliability consideration is valve spring harmonic resonance under sustained high‑rpm operation, with internal Porsche durability testing (2024) indicating minor instability in 5% of pre‑Q3‑2024 engines during 30+ minute track sessions above 8,000 rpm. No valve float or mechanical failure was observed, but the condition may accelerate wear. The revised spring design eliminates this risk entirely.
Analysis derived from manufacturer technical service bulletins and industry workshop records. Repair procedures should follow manufacturer guidelines.
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The MDG.GA is engineered for high-revving durability with motorsport-grade internals. Early builds (pre-Q3-2024) show minor valve spring resonance at sustained 8k+ rpm—non-damaging but addressable with updated parts. With RON 98 fuel, Porsche C4 oil, and adherence to service intervals, it offers excellent longevity. Dry-sump and lightweight design prioritize performance over daily compromise.
Main concerns are valve spring resonance (pre-Q3-2024, high-rpm only), GPF saturation from short trips, transient oil pressure drop during aggressive cornering, and early-batch ignition coil degradation. All are documented in Porsche bulletins 911-24-115 and 911-24-025. Most issues are avoidable or correctable with OEM updates.
Exclusively the 992.2-generation 911 S/T (2024–present), a limited-production model blending GT3 internals with Carrera ergonomics. This engine is not used in GT3, GT3 RS, GTS, Turbo, or any other Porsche model. Total production was capped at 1,963 units worldwide.
Porsche does not support ECU tuning. The engine is already optimized for 8,400 rpm with minimal safety margins. Aftermarket remaps offer negligible gains and risk GPF or valve train damage. Most owners retain stock calibration to preserve the analogue character and collector value.
Approximately 12.0 L/100km combined (official WLTP). Real-world mixed driving yields 10–13.5 L/100km; track use can exceed 22 L/100km. Official figure is 24 mpg UK combined. High displacement and 8,400 rpm redline inherently limit efficiency despite advanced injection.
Yes. Like all modern Porsche flat‑6 engines, the MDG.GA is an interference design. Timing chain failure—though extremely unlikely—could cause valve-piston contact. The system is engineered for full engine life under normal and spirited driving 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 high rpm. Oil changes are recommended every 15,000 km or annually. Non-approved oils risk spring and bearing wear.
Comprehensive technical documentation and regulatory references
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Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
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