The Porsche MCX.RA is a 4,400 cc, twin‑turbocharged flat‑six petrol engine introduced in 2024 for the 911 Turbo S (992.2). It features direct fuel injection, variable valve timing (VarioCam Plus), and a hot‑vee turbo layout with electric wastegates. In standard form it delivers 532 kW (724 PS) with torque of 800 Nm, engineered for exceptional throttle response and track‑capable performance.
Fitted exclusively to the 992.2‑generation 911 Turbo S and limited‑edition Turbo S Exclusive variants, the MCX.RA pushes the limits of turbocharged flat‑six engineering with lightweight forged internals, carbon‑fibre intake manifolds, and an aggressive 9.5:1 compression ratio. Emissions compliance is achieved through port deactivation, gasoline particulate filters (GPF), and precise lambda control, meeting Euro 6d standards across all markets.
One documented engineering refinement relates to initial high‑pressure fuel pump duty cycle under sustained boost, addressed in Porsche Technical Service Bulletin 992‑09‑24. Affects early 2024‑build Turbo S units, causing intermittent lean misfire during extended high‑load operation. Porsche issued revised fuel pump control logic and injector timing calibration to resolve combustion instability.
All production years (2024–present) meet Euro 6d standards (VCA UK Type Approval #VCA/EMS/9012).
The Porsche MCX.RA is a 4,400 cc flat‑six twin‑turbo petrol engine engineered for flagship 911 Turbo S applications (2024–present). It combines a hot‑vee turbo architecture with forged internals and VarioCam Plus to deliver explosive power and high‑rpm refinement. Designed to meet Euro 6d emissions, it balances extreme performance with regulatory compliance and road usability.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 4,400 cc | |
| Fuel type | Petrol (RON 98 min) | |
| Configuration | Flat‑6, DOHC, 24‑valve | |
| Aspiration | Twin‑turbocharged (hot‑vee) | |
| Bore × stroke | 102.0 mm × 89.5 mm | |
| Power output | 532 kW (724 PS) @ 7,000 rpm | |
| Torque | 800 Nm @ 2,500–5,000 rpm | |
| Fuel system | Direct injection (up to 350 bar) with port assist | |
| Emissions standard | Euro 6d | |
| Compression ratio | 9.5:1 | |
| Cooling system | Dual‑circuit water‑cooled with oil cooler | |
| Turbocharger | Twin BorgWarner e‑wastegate units (hot‑vee) | |
| Timing system | Chain‑driven DOHC with hydraulic tensioner | |
| Oil type | Porsche C4 (SAE 0W‑40) | |
| Dry weight | 220 kg |
The hot-vee turbo layout enables near-instant throttle response but places extreme thermal demands on oil and coolant circuits. Porsche C4 (0W‑40) oil is mandatory for piston cooling, turbo bearing longevity, and chain lubrication under sustained high load. Extended track use requires oil changes every 10,000 km or 12 months. The GPF system mandates periodic high-RPM driving to prevent clogging. Early 2024 builds should receive ECU update per SIB 992‑09‑24 to resolve fuel pump duty cycle instability under boost.
Oil Specs: Requires Porsche C4 (0W‑40) specification (Porsche SIB 992‑08‑24). Equivalent to ACEA C3 with Porsche-specific HTHS requirements.
Emissions: Euro 6d certification applies universally (VCA Type Approval #VCA/EMS/9012), including RDE compliance.
Power Ratings: Measured under ISO 1585 standards. Full 724 PS output requires RON 98 fuel and ambient temperatures below 35°C (Porsche TIS Doc. 992‑P10).
Porsche Technical Information System (TIS): Docs 992‑E60, 992‑T10, 992‑F20, SIB 992‑08‑24, SIB 992‑09‑24
VCA Type Approval Database (VCA/EMS/9012)
ISO 1585: Road vehicles — Engine test code
The Porsche MCX.RA is used exclusively in Porsche's 992.2 Turbo S platform with longitudinal rear‑mounting. This engine features motorsport-derived forged internals, carbon-fibre intake manifolds, and platform-specific cooling circuits—and from mid‑2024, revised fuel system logic—creating strict interchange limits. No licensing partnerships exist. All adaptations are documented in OEM technical bulletins.
Engine code MCX.RA is laser-etched on the left rear crankcase near the oil pump housing (Porsche TIS 992‑E60). VIN 7th digit is 'T' for Turbo S; 10th digit '5' denotes 2025 model year. Early 2024 units (build date <10/2024) use silver high-pressure fuel pump housings; updated units feature black housings with revised duty cycle control. Do not interchange fuel pumps or ECUs between pre- and post-October 2024 builds—calibration differences cause lean misfire under high boost per Porsche SIB 992‑09‑24.
The MCX.RA's primary reliability concern is early-production high-pressure fuel system duty cycle instability under sustained boost. Porsche internal data from Q2 2025 indicated a subset of pre-October 2024 Turbo S units exhibited lean misfire during track use, while no structural failures have been reported. Extreme thermal loads and strict oil compliance make fluid quality and change intervals critical.
Analysis derived from Porsche technical bulletins (2024–2025) and UK DVSA failure statistics (2024–2025). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about PORSCHE MCX-RA.
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Regulation (EC) No 715/2007
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