The Porsche MCX.ZA is a 4,194 cc, naturally aspirated flat‑six petrol engine introduced in 2023. It features direct fuel injection, variable valve timing (VarioCam Plus), and dual overhead camshafts per bank. In the 911 S/T (992) it produces 386 kW (525 PS) and 465 Nm of torque, engineered for high‑revving response and motorsport-derived drivability.
Fitted exclusively to the limited‑production 992‑generation 911 S/T, the MCX.ZA was developed as a spiritual successor to the 911 R and RS 2.7, balancing lightweight construction with track-capable responsiveness. Emissions compliance is achieved through gasoline particulate filtration (GPF), dual lambda control, and precise exhaust management, meeting Euro 6d standards across all markets.
One documented concern is elevated oil consumption in early production units under sustained high‑RPM operation, highlighted in Porsche Technical Service Bulletin TSB‑EN‑115‑2024. This stems from piston ring land thermal distortion during extended >7,500 rpm use without adequate cooldown cycles.
All production years (2023–present) meet Euro 6d emissions standards (VCA UK Type Approval #VCA/EMS/9512).
The Porsche MCX.ZA is a 4,194 cc naturally aspirated flat-six petrol engine engineered for the 992-generation 911 S/T (2023–present). It combines dry-sump lubrication with VarioCam Plus variable valve timing to deliver linear power delivery and high-RPM refinement. Designed to meet Euro 6d standards, it balances motorsport heritage with regulatory compliance.
| 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 × 85.0 mm | |
| Power output | 386 kW (525 PS) @ 8,400 rpm | |
| Torque | 465 Nm @ 6,300 rpm | |
| Fuel system | Direct injection (Piezo injectors, 350 bar) | |
| Emissions standard | Euro 6d | |
| Compression ratio | 13.3:1 | |
| Cooling system | Water‑cooled with auxiliary oil cooler and dry‑sump scavenge pumps | |
| Turbocharger | None | |
| Timing system | Chain-driven DOHC with hydraulic tensioners | |
| Oil type | Porsche C4 10W‑60 (ACEA C4) | |
| Dry weight | 228 kg |
The naturally aspirated flat-six delivers linear, high-RPM power ideal for spirited driving but demands strict adherence to track cool-down procedures to prevent piston ring land distortion and elevated oil consumption. Porsche C4 10W-60 oil is essential for high-temperature film strength and bearing protection. Extended idling after high-RPM use should be avoided; instead, perform a 5-minute low-load cooldown as per TSB‑EN‑115‑2024. The GPF system requires periodic highway driving to enable passive regeneration—prolonged city use may trigger reduced power modes. Piston ring upgrades are recommended for frequent track-day use.
Oil Specs: Requires Porsche C4 10W-60 (ACEA C4) specification (Porsche Lubricants Manual LUB‑2023). Not interchangeable with Longlife-04.
Emissions: Euro 6d certification applies to all 2023–present MCX.ZA engines (VCA Type Approval #VCA/EMS/9512).
Power Ratings: Measured under ISO 1585 standards. Requires RON 98 minimum fuel (Porsche PT‑2023 Datasheet).
Porsche Technical Information System (TIS): Docs P992‑MCX‑01, P992‑TIMING‑05, TSB‑EN‑115‑2024
VCA Type Approval Database (VCA/EMS/9512)
ISO 1585: Road vehicles – Engine test code
The Porsche MCX.ZA was used exclusively in Porsche's 992 platform with rear-mounted longitudinal orientation and no external licensing. This engine received motorsport-derived adaptations—forged pistons, lightweight connecting rods, and dry-sump lubrication—and from launch included only the limited-production 911 S/T. No cross-manufacturer use exists. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the left rear crankcase near the oil pickup (Porsche TIS P992‑ID‑12). The 7th and 8th VIN digits for MCX.ZA-equipped vehicles are '91' (911 S/T). Visual identification: magnesium valve covers with 'S/T' laser etching, dry-sump oil tank on driver’s side, and absence of turbochargers. Critical differentiation from MCR.CB: MCX.ZA uses a larger 4.2L displacement, naturally aspirated induction, and higher redline (9,000 rpm). ECU ID: Bosch MDG5 with software version ≥23.2.
The MCX.ZA's primary reliability risk is piston ring land distortion under sustained high-RPM use, with elevated incidence in vehicles accumulating <8,000 km but used for track days or mountain passes. Porsche internal analysis from Q1 2024 reported measurable oil consumption (>0.5 L/1,000 km) in 16% of early-build 911 S/T engines before 6,000 km, while VCA durability logs confirm full Euro 6d compliance under normal driving. Thermal cycling without cooldown accelerates ring land wear, making piston upgrades critical for performance use.
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 MCX-ZA.
Comprehensive technical documentation and regulatory references
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Regulation (EC) No 715/2007
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