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 GT2 RS and limited-edition 911 GT2 RS Clubsport variants, the MDJ.UA represents the highest-output production V8 ever developed by Porsche for the 911 platform. Emissions compliance was achieved through gasoline particulate filters (GPF), adaptive combustion control, and real-time lambda monitoring, ensuring full Euro 6d compliance despite extreme performance targets.
One documented concern is premature wear of the high-pressure fuel pump (HPFP) cam lobe interface under repeated thermal cycling, highlighted in Porsche Technical Bulletin PTB‑2025‑02. This stems from metallurgical stress in early HPFP batches during sustained wide-open-throttle operation, particularly prevalent in vehicles used for back-to-back track sessions without adequate cooldown.
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 MDJ.UA delivers hypercar-level performance with exceptional throttle response, but demands disciplined operation. RON 98 fuel is mandatory, and oil changes with Porsche C4 0W-40 must occur every 10,000 km or 12 months—whichever comes first. Extended track use requires a 90-second cooldown to prevent turbo bearing coking and HPFP thermal degradation. GPF regeneration is passive but may require forced cycles after repeated short trips. Early 2024 units should be inspected per PTB-2025-02 for HPFP cam lobe wear.
Oil Specs: Requires Porsche C4 0W-40 (ACEA C3-aligned) or Porsche A40 5W-40 (Porsche Lubricants Guide 2025).
Emissions: Full Euro 6d compliance for all 2024–2025 models (VCA Type Approval #VCA/EMS/POR2025).
Power Ratings: Measured per ECE R85. Power figures require RON 98 fuel quality (Porsche PIWIS Doc. ENG-MDJ-2024).
Porsche PIWIS Documentation: ENG-MDJ-2024, FUE-2024, TIM-2024
Porsche Technical Bulletins: PTB-2024-11, PTB-2025-02
VCA Type Approval Database (VCA/EMS/POR2025)
EU Regulation (EU) 2017/1151
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.
Engine code MDJ.UA is stamped on the rear crankcase near the flywheel housing (Porsche PIWIS ENG-ID-08). VIN 7th digit 'W' indicates GT2-series V8 in 992 platform. Pre-Q3-2024 models use HPFP with part number 06K127025S; post-Q3-2024 use revised 06K127025T with hardened cam lobe. Visual cue: matte carbon-finish valve covers with 'GT2 RS 700 PS' laser etching. Do not confuse with MCX.TA (Turbo S V8). HPFP inspection or replacement must follow PTB-2025-02 for early-production units.
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.
Find answers to most commonly asked questions about PORSCHE MD-JUA.
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