The Porsche MCR.C is a 4,400 cc, twin‑turbocharged flat‑six petrol engine introduced in 2023 for high‑performance applications. It features direct fuel injection, variable valve timing (VarioCam Plus), and twin-scroll turbochargers mounted in a hot‑vee layout. In standard form it delivers 450 kW (612 PS) with torque of 750 Nm, engineered for dynamic response and track‑capable durability.
Fitted exclusively to the 911 GT3 RS (992.2) and limited‑run 911 Sport Classic variants, the MCR.C was engineered for motorsport‑derived responsiveness and high‑rpm refinement. 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 update relates to early‑production turbo wastegate calibration, addressed in Porsche Technical Service Bulletin 911‑03‑24. Affects initial 992.2 GT3 RS units built before August 2023, causing inconsistent boost delivery under partial load. Porsche issued revised ECU calibration and wastegate actuator firmware to resolve transient response anomalies.
All production years (2023–present) meet Euro 6d standards (VCA UK Type Approval #VCA/EMS/5678).
The Porsche MCR.C is a 4,400 cc flat‑six twin‑turbo petrol engine engineered for track‑focused 911 variants (2023–present). It combines a hot‑vee turbo layout with VarioCam Plus to deliver exceptional throttle response and high‑rpm power. Designed to meet Euro 6d emissions, it balances motorsport heritage with modern compliance and drivability.
| 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 | 450 kW (612 PS) @ 7,500 rpm | |
| Torque | 750 Nm @ 2,500–5,500 rpm | |
| Fuel system | Direct injection (up to 350 bar) with port assist | |
| Emissions standard | Euro 6d | |
| Compression ratio | 9.0:1 | |
| Cooling system | Dual‑circuit water‑cooled | |
| Turbocharger | Twin BorgWarner twin‑scroll units (hot‑vee) | |
| Timing system | Chain‑driven DOHC with hydraulic tensioner | |
| Oil type | Porsche C4 (SAE 0W‑40) | |
| Dry weight | 218 kg |
The hot-vee turbo layout enables near-instantaneous throttle response but places high thermal demands on oil and coolant systems. Porsche C4 (0W‑40) oil is essential for piston cooling and chain lubrication under sustained high load. Extended track use requires adherence to 10,000 km or 12-month oil intervals. The GPF system mandates use of low-ash fuel additives and periodic high-speed runs to prevent clogging. Early-build engines (pre-08/2023) should receive ECU calibration update per SIB 911‑03‑24 to ensure consistent boost control.
Oil Specs: Requires Porsche C4 (0W‑40) specification (Porsche SIB 911‑02‑24). Equivalent to ACEA C3 with Porsche-specific HTHS requirements.
Emissions: Euro 6d certification applies universally (VCA Type Approval #VCA/EMS/5678). Includes RDE compliance for real-world driving.
Power Ratings: Measured under ISO 1585 standards. Full 612 PS output requires RON 98 fuel and ambient temperatures below 35°C (Porsche TIS Doc. 992‑P03).
Porsche Technical Information System (TIS): Docs 992‑E44, 992‑T07, 992‑F12, SIB 911‑02‑24, SIB 911‑03‑24
VCA Type Approval Database (VCA/EMS/5678)
ISO 1585: Road vehicles — Engine test code
The Porsche MCR.C is used exclusively in Porsche's 992.2 platform with longitudinal rear‑mounting. This engine features motorsport-derived dry‑sump lubrication and carbon-fibre intake manifolds—and from mid‑2023, updated wastegate firmware—creating strict interchange limits. No licensing partnerships exist. All adaptations are documented in OEM technical bulletins.
Engine code MCR.C is laser-etched on the left rear crankcase near the oil pump housing (Porsche TIS 992‑E44). VIN 7th digit is 'R' for GT3 RS and 'S' for Sport Classic; 10th digit '4' denotes 2024 model year. Early units (build date <08/2023) have silver actuator housings; updated units use black anodised housings. Do not interchange ECUs or turbo actuators between pre- and post-August 2023 builds—calibration differences cause boost instability (Porsche SIB 911‑03‑24).
The MCR.C's primary reliability concern is early-production turbo wastegate calibration sensitivity, with elevated incidence in partial-load driving cycles. Porsche internal data from Q2 2024 indicated a subset of pre-August 2023 GT3 RS units exhibited boost instability under transient conditions, while no structural failures have been reported. High thermal loads and strict oil compliance make fluid quality and change intervals critical.
Analysis derived from Porsche technical bulletins (2023–2025) and UK DVSA failure statistics (2023–2025). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about PORSCHE MCR-C.
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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