The Porsche MDA.BA is a 4,194 cc, naturally aspirated flat-six petrol engine produced between 2022 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 257–265 kW (350–360 PS) and 420–430 Nm of torque, engineered for linear power delivery and acoustic purity in entry-level 911 applications.
Fitted exclusively to the 992-generation 911 Carrera and Carrera Cabriolet base models, the MDA.BA represents a modern evolution of Porsche’s air-cooled legacy with enhanced efficiency and emissions control. Emissions compliance was achieved through gasoline particulate filters (GPF), precise lambda control, and optimized combustion phasing, allowing full Euro 6d compliance across all production variants.
One documented concern is carbon buildup on intake valves due to the absence of port injection, highlighted in Porsche Technical Bulletin PTB‑2023‑04. This stems from fuel injector spray patterns depositing varnish on valve stems under frequent low-load operation, particularly prevalent in urban-driven vehicles with minimal highway use.
All production years (2022–2025) meet full Euro 6d standards (VCA UK Type Approval #VCA/EMS/POR2025).
The Porsche MDA.BA is a 4,194 cc naturally aspirated flat-six petrol engine engineered exclusively for the 992-generation 911 Carrera platform (2022–2025). It combines Bosch HDP6 direct injection with symmetrical exhaust manifolds to deliver smooth, linear power and the signature flat-six acoustic character. Designed to meet Euro 6d emissions standards, it features gasoline particulate filtration and adaptive valve timing for clean, responsive operation.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 4,194 cc | |
| Fuel type | Petrol (RON 95 min, RON 98 recommended) | |
| Configuration | Flat‑6, DOHC, 24‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 102.0 mm × 85.8 mm | |
| Power output | 257–265 kW (350–360 PS) | |
| Torque | 420–430 Nm @ 4,500–6,500 rpm | |
| Fuel system | Bosch HDP6 high-pressure direct injection (up to 350 bar) | |
| Emissions standard | Euro 6d | |
| Compression ratio | 12.5:1 | |
| Cooling system | Water-cooled with dual radiators | |
| Turbocharger | None | |
| Timing system | Chain-driven DOHC with hydraulic tensioners | |
| Oil type | Porsche C4 0W-40 (or Porsche A40 5W-40) | |
| Dry weight | 196 kg |
The naturally aspirated flat-six delivers linear throttle response and high-revving character ideal for engaging driving, but lacks the low-end torque of turbocharged variants. RON 98 fuel is recommended to prevent knock under sustained load. Without port injection, intake valves are prone to carbon buildup—regular highway driving is essential to maintain airflow and prevent idle instability. Porsche C4 0W-40 oil ensures proper lubrication of the high-compression internals and timing chain. Pre-2024 units should be inspected for early signs of valve deposits per PTB-2023-04.
Oil Specs: Requires Porsche C4 0W-40 (ACEA C3-aligned) or Porsche A40 5W-40 (Porsche Lubricants Guide 2024).
Emissions: Full Euro 6d compliance for all 2022–2025 models (VCA Type Approval #VCA/EMS/POR2025).
Power Ratings: Measured per ECE R85. Power figures assume RON 98 fuel quality (Porsche PIWIS Doc. ENG-MDA-2022).
Porsche PIWIS Documentation: ENG-MDA-2022, FUE-2022, TIM-2022
Porsche Technical Bulletins: PTB-2022-11, PTB-2023-04
VCA Type Approval Database (VCA/EMS/POR2025)
EU Regulation (EU) 2017/1151
The Porsche MDA.BA is used exclusively in the 992-generation 911 Carrera platform with rear-mounted, longitudinal orientation and no external licensing. This engine features platform-specific dry-sump oil pan geometry, reinforced engine mounts, and bespoke intake manifolds for acoustic tuning. From mid-2024, Porsche introduced revised injector spray patterns to reduce valve deposits, creating minor service distinctions documented in technical bulletins.
Engine code MDA.BA is stamped on the rear crankcase near the flywheel housing (Porsche PIWIS ENG-ID-06). VIN 7th digit 'F' indicates base flat-six in 992 platform. Pre-2024 models use fuel injectors with part number 06K906031E; post-2024 use revised 06K906031G with optimized spray pattern. Visual cue: silver aluminum valve covers with 'Boxer 6' embossing. Do not confuse with turbocharged MCV/MCX V8 engines or older MA2 series. Intake valve cleaning should be considered per PTB-2023-04 for urban-driven examples.
The MDA.BA's primary reliability risk is intake valve carbon buildup due to direct injection without port assist, with elevated incidence in urban or short-trip driving. Porsche internal service data from 2023 indicated a measurable uptick in valve cleaning procedures before 50,000 km in city-driven vehicles, while UK DVSA statistics show minimal emissions-related MOT failures due to robust GPF control. Extended low-RPM operation without high-load cycles accelerates deposit formation, making driving pattern and fuel quality critical.
Analysis derived from Porsche technical bulletins (2022–2025) and UK DVSA failure statistics (2023–2025). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about PORSCHE MDA-BA.
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