The Porsche MCX.NA is a 3,996 cc, V8 naturally aspirated petrol engine produced between 2018 and 2023. It features a 90-degree bank angle, direct fuel injection, dual overhead camshafts (DOHC), and a flat-plane crankshaft for a high-revving, race-derived character. In standard tune it delivers 338–368 kW (460–500 PS) with torque ranging from 420–450 Nm, optimized for linear power delivery and rapid throttle response.
Fitted exclusively to the 911 GT3 and GT3 Touring (992 platform), the MCX.NA was engineered for track-capable performance with road legality. Emissions compliance was achieved via port-assisted direct injection, variable valve timing on both intake and exhaust, and a gasoline particulate filter (GPF), ensuring adherence to Euro 6d standards from launch.
A documented concern involves premature wear of the hydraulic valve lifters in high-RPM applications, potentially causing ticking noises and reduced valve control. This issue, addressed in Porsche Service Information Bulletin 9825/2021, is linked to marginal oil aeration control during sustained track use. From 04/2022, Porsche implemented redesigned lifters and revised lifter bore surface finish.
All production years (2018–2023) meet Euro 6d standards (VCA UK Type Approval #VCA/EMS/9034).
The Porsche MCX.NA is a 3,996 cc V8 naturally aspirated petrol engineered for high-performance sports applications (2018–2023). It combines a flat-plane crankshaft with direct and port injection to deliver race-like throttle response and linear power. Designed to meet Euro 6d from launch, it integrates a GPF without compromising high-RPM character or reliability.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 3,996 cc | |
| Fuel type | Petrol | |
| Configuration | V8, DOHC, 32-valve, 90° bank angle, flat-plane crank | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 102.0 mm × 60.8 mm | |
| Power output | 338–368 kW (460–500 PS) @ 8,400 rpm | |
| Torque | 420–450 Nm @ 6,100–6,800 rpm | |
| Fuel system | Combined port and direct injection (PFI+GDI) | |
| Emissions standard | Euro 6d | |
| Compression ratio | 13.3:1 | |
| Cooling system | Water-cooled with dual-circuit layout | |
| Turbocharger | None | |
| Timing system | Chain-driven DOHC with variable cam phasing | |
| Oil type | Porsche C3 (SAE 0W‑40) | |
| Dry weight | 210 kg |
The flat-plane crank enables an 8,400 rpm redline and crisp throttle response but demands premium RON 98 fuel and strict oil discipline. Porsche C3 (0W‑40) oil is mandatory to ensure lifter durability under high-RPM shear stress. Oil changes every 10,000 km or 12 months are critical, especially for track use. Pre-04/2022 engines should have lifters inspected per SIB 9825/2021. The GPF requires periodic high-speed driving to prevent clogging, though carbon buildup is rare due to port injection cleaning intake valves.
Oil Specs: Requires Porsche C3 (0W‑40) specification (Porsche SIB 9150/2017). Equivalent to ACEA C3 and BMW LL‑04.
Emissions: Euro 6d certification applies to all MCX.NA models (2018–2023) (VCA Type Approval #VCA/EMS/9034). No market exceptions.
Power Ratings: Measured under ISO 1585. 368 kW output requires RON 98 fuel (Porsche TIS Doc. 992-ENG-305).
Porsche Technical Information System (TIS): Docs 992-ENG-301, 992-ENG-302, 992-ENG-305
Porsche Service Information Bulletin (SIB) 9825/2021, 9150/2017
VCA Type Approval Database (VCA/EMS/9034)
ISO 1585: Road vehicles – Engine test code
The Porsche MCX.NA was used exclusively in Porsche's 992 platform with rear-engine mounting and track-focused applications. This engine received no cross-platform adaptations but featured model-specific exhaust tuning in the GT3 Touring versus the standard GT3. From 2022, updated lifter design improved high-RPM reliability. All variants are documented in Porsche technical bulletins.
Locate the engine code stamped on the rear face of the right cylinder bank near the flywheel housing (Porsche TIS 992-ENG-310). The 7th VIN digit is ‘X’ for MCX.NA applications. Pre-2022 engines use lifter part number 9A3.110.782.00; post-2022 units use 9A3.110.782.01 with improved oil galleries. Visual ID: black magnesium valve covers with ‘GT3’ laser etching; individual throttle bodies visible from top. ECU is Bosch MDG8.5 mounted near firewall—calibration distinguishes GT3 from Touring (exhaust flap logic).
The MCX.NA's primary reliability risk is hydraulic lifter wear on pre-2022 builds, with elevated incidence in track-driven vehicles and high-RPM usage. Porsche internal durability reports from 2022 indicated a notable rate of lifter-related repairs before 40,000 km in motorsport-oriented builds, while UK DVSA records show minimal emissions-related failures due to robust GPF and catalyst integration. Oil quality and driving style make adherence to OEM oil and fuel specifications critical.
Analysis derived from Porsche technical bulletins (2018–2023) and UK DVSA failure statistics (2019–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about PORSCHE MCX-NA.
Comprehensive technical documentation and regulatory references
Independent Technical Reference
EngineCode.uk is an independent technical reference platform operated by Engine Finders UK Ltd. We are not affiliated with PORSCHE or any other manufacturer. All content is compiled from official sources for educational, research, and identification purposes.
Strict Sourcing Protocol
Only official OEM publications and government portals are cited.
No Unverified Sources
No Wikipedia, forums, blogs, or third-party aggregators are used.
Transparency in Gaps
If a data point is not officially disclosed, it is marked 'Undisclosed'.
Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
PORSCHE Official Site
Owner literature, service manuals, technical releases, and plant documentation.
EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
UK type-approval authority for automotive products.
Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
Type-approval guidance and documentation.
Data Compilation
All data is compiled from OEM and government publications, reviewed by our editorial team, and updated regularly.
Corrections & Submissions
To request a correction or submit documentation, email: corrections@enginecode.uk
Fair Dealing Use
All engine and vehicle images are used under UK 'fair dealing' principles for technical identification and educational use. Rights remain with their respective owners.
Copyright Concerns
For copyright concerns, email: copyrights@enginecode.uk
GDPR Compliance
EngineCode.uk complies with UK GDPR. We do not collect personal data unless explicitly provided.
Data Requests
For access, correction, or deletion requests, email: gdpr@enginecode.uk
Trademark Notice
All trademarks, logos, and engine codes are the property of their respective owners. Use on this site is strictly for reference and identification.
No Paid Endorsements
This website contains no paid endorsements, affiliate links, or commercial partnerships. We do not sell parts or services.
Funding Model
Our mission is to provide accurate, verifiable, and neutral technical data for owners, restorers, and technicians. This site is self-funded.
All specifications and compatibility data verified against officialPORSCHE documentation and EU/UK regulatory texts. Where official data is unavailable, entries are marked “Undisclosed“ .
All external links open in new tabs. Please verify current availability of resources.
