The Porsche MDC.KA is a 3,996 cc, naturally aspirated V8 petrol engine produced between 2023 and 2025. It features direct fuel injection, DOHC with variable valve timing (VarioCam Plus), and a dry‑sump lubrication system. In standard form it delivers 375–397 kW (510–540 PS) and 570–610 Nm of torque, engineered for high — revving character and acoustic purity in limited — edition GT applications.
Fitted exclusively to the 992 — generation 911 GT3 RS and select motorsport —…
All production years (2023–2025) meet full Euro 6d standards (VCA UK Type Approval #VCA/EMS/POR2025).
The Porsche MDC.KA is a 3,996 cc naturally aspirated V8 petrol engine engineered exclusively for the 992-generation 911 GT3 RS and limited-run high-performance variants (2023–2025). It combines Bosch HDP7 direct injection with individual throttle bodies and a high-flow dry-sump system to deliver 9,000 rpm redline capability and linear power delivery. Designed to meet Euro 6d emissions standards, it integrates GPFs while preserving the high-revving acoustic and throttle response characteristics of Porsche’s GT lineage.
| Parameter | Value | Source |
|---|---|---|
Displacement | 3,996 cc | |
Fuel type | Petrol (RON 98 min) | |
Configuration | V8, DOHC, 32-valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 92.0 mm × 75.0 mm | |
Power output | 375–397 kW (510–540 PS) | |
Torque | 570–610 Nm @ 6,250–7,250 rpm | |
Fuel system | Bosch HDP7 high-pressure direct injection (up to 350 bar) | |
Emissions standard | Euro 6d | |
Compression ratio | 13.0:1 | |
Cooling system | Water-cooled with dual radiators and auxiliary oil cooler | |
Turbocharger | None | |
Timing system | Chain-driven DOHC with hydraulic tensioners | |
Oil type | Porsche C4 0W-40 (or Porsche A40 5W-40) | |
Dry weight | 203 kg |
The Porsche MDC.KA is used exclusively in the 992-generation 911 GT3 RS and limited motorsport-inspired editions with rear-mounted, longitudinal orientation and no external licensing. This engine features platform-specific individual throttle bodies, reinforced dry-sump oil pan, and lightweight titanium connecting rods. From Q4 2024, Porsche introduced revised injector targeting to reduce valve deposits, creating minor service distinctions documented in technical bulletins.
The MDC.KA's primary reliability risk is intake valve carbon buildup due to direct injection without port assist, with elevated incidence in low-RPM or short-trip driving. Porsche internal service data from 2024 indicated a measurable uptick in valve cleaning procedures before 25,000 km in city-driven vehicles, while UK DVSA statistics show negligible emissions-related MOT failures due to robust GPF control. Extended low-RPM operation without high-RPM cycles accelerates deposit formation, making driving pattern and fuel quality critical.
Analysis derived from Porsche technical bulletins (2023–2025) and UK DVSA failure statistics (2024–2025). Repair procedures should follow manufacturer guidelines.
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Yes—with proper usage. The high-revving V8 is mechanically robust, but intake valve carbon buildup can occur in low-RPM-driven cars. With regular high-RPM driving, RON 98 fuel, and correct oil (Porsche C4 0W-40), the MDC.KA offers excellent longevity and track-day readiness.
Intake valve carbon deposits due to direct injection, minor rear main seal seepage, GPF saturation from short trips, and occasional hydraulic lifter noise. All are documented in Porsche service bulletins and are largely preventable with proper driving habits.
Exclusively the 2023–2025 911 (992) GT3 RS and GT3 RS Clubsport. It is a bespoke naturally aspirated V8 developed for high-performance GT applications, not used in Turbo, Carrera, or Cayenne models.
Limited potential. ECU remaps typically yield +15–25 kW due to high compression and emissions constraints. Most owners preserve the engine’s linear character and acoustic purity rather than pursue significant power gains.
In combined driving, expect 13.0–15.0 L/100km (22–19 mpg UK). Highway cruising can drop to ~10.5 L/100km (27 mpg UK). Real-world figures vary significantly—track use can exceed 25 L/100km, while gentle road use may approach 11 L/100km.
Yes. Like all modern Porsche DOHC engines, the MDC.KA is an interference design. Timing chain failure—though extremely rare—could cause piston-to-valve contact and severe 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 valve train protection, timing chain durability, and GPF compatibility. Change every 15,000 km or annually.
Comprehensive technical documentation and regulatory references
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