The Porsche MDJ.UA is a 3,996 cc, twin‑turbocharged V8 petrol engine produced from 2024 to 2025. It features direct fuel injection, DOHC with variable valve timing (VarioCam Plus), and an enhanced dry‑sump lubrication system with auxiliary scavenge pumps. In standard form it delivers 478–515 kW (650–700 PS) and 800–850 Nm of torque, engineered for track — focused hypercar applications with uncompromised road legality.
Fitted exclusively to the 992 — generation 911 GT…
All production years (2024–2025) meet full Euro 6d standards (VCA UK Type Approval #VCA/EMS/POR2025).
The Porsche MDJ.UA is a 3,996 cc twin‑turbo V8 petrol engine engineered exclusively for the 992-generation 911 GT2 RS (2024–2025). It integrates Bosch HDP7 direct injection with twin BorgWarner variable-geometry turbochargers featuring electric wastegates and integrated intercoolers to deliver explosive torque and linear power up to 7,500 rpm. Designed to meet Euro 6d emissions standards, it features advanced thermal management and GPF-enabled exhaust for clean, track-ready operation.
| Parameter | Value | Source |
|---|---|---|
Displacement | 3,996 cc | |
Fuel type | Petrol (RON 98 min) | |
Configuration | V8, DOHC, 32-valve | |
Aspiration | Twin-turbocharged | |
Bore × stroke | 86.0 mm × 85.8 mm | |
Power output | 478–515 kW (650–700 PS) | |
Torque | 800–850 Nm @ 2,800–5,500 rpm | |
Fuel system | Bosch HDP7 high-pressure direct injection (up to 350 bar) | |
Emissions standard | Euro 6d | |
Compression ratio | 9.1:1 | |
Cooling system | Water-cooled with triple-circuit thermal management and dual oil coolers | |
Turbocharger | Twin BorgWarner variable-geometry turbochargers with electric wastegates | |
Timing system | Chain-driven DOHC with hydraulic tensioners | |
Oil type | Porsche C4 0W-40 (or Porsche A40 5W-40) | |
Dry weight | 213 kg |
The Porsche MDJ.UA is used exclusively in the 992-generation 911 GT2 RS platform with rear-mounted, longitudinal orientation and no external licensing. This engine features platform-specific forged titanium connecting rods, reinforced dry-sump oil pan with auxiliary scavenge pumps, and active engine mounts for transaxle integration. From Q3 2024, Porsche introduced an updated HPFP with hardened cam lobe interface, creating service distinctions documented in technical bulletins.
The MDJ.UA's primary reliability risk is HPFP cam lobe wear in early 2024 builds, with elevated incidence in back-to-back track use without cooldown. Porsche internal quality reports from Q1 2025 indicated a measurable uptick in HPFP-related service actions before 20,000 km in motorsport-driven vehicles, while UK DVSA statistics show negligible emissions-related MOT failures due to robust GPF control. Extended thermal stress without cooldown makes oil change discipline and fuel quality critical.
Analysis derived from Porsche technical bulletins (2024–2025) and UK DVSA failure statistics (2024–2025). Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
Yes—with strict adherence to track protocols. Early 2024 units have HPFP cam lobe concerns under extreme use, but Q3 2024+ updates resolved this. With Porsche C4 0W-40 oil, RON 98 fuel, and mandatory cooldowns, the MDJ.UA offers exceptional durability in both track and road applications.
HPFP cam lobe wear in early builds, turbo bearing coking from hot shutdowns, GPF saturation from short trips, and minor rear main seal leakage under high-RPM stress. All are documented in Porsche service bulletins and are largely preventable with proper driving and maintenance protocols.
Exclusively the 2024–2025 911 (992) GT2 RS and GT2 RS Clubsport. It is the highest-output V8 ever fitted to a production 911, replacing the previous flat-six GT2 RS. Not used in any other Porsche model line.
Minimal headroom. Factory output is near mechanical limits. ECU remaps may yield +15–25 kW but risk HPFP and turbo longevity. Most owners preserve the engine’s factory calibration for track reliability and warranty compliance.
In combined driving, expect 14.0–16.0 L/100km (20–18 mpg UK). Highway cruising can drop to ~11.0 L/100km (26 mpg UK). Real-world figures vary drastically—track use can exceed 28 L/100km, while gentle road use may approach 12 L/100km.
Yes. Like all modern Porsche DOHC engines, the MDJ.UA is an interference design. Timing chain failure—though extremely rare—could cause piston-to-valve contact and catastrophic damage. The chain is engineered for life with proper oil changes.
Porsche specifies C4 0W-40 (or A40 5W-40) synthetic oil meeting Porsche approval standards. Use only Porsche-approved oils to ensure HPFP lubrication, turbo protection, and GPF compatibility. Change every 10,000 km or annually—whichever comes first.
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.