The Porsche MDD.NC is a 3,997 cc, twin‑turbocharged V8 petrol engine introduced in 2020 for the Cayenne Coupé Turbo S and high-performance Panamera variants. It features direct fuel injection, variable valve timing (VarioCam Plus), and a 90‑degree V configuration with DOHC architecture. Factory output is rated at 463 kW (630 PS) with peak torque of 850 Nm at 2,300–4,500 rpm, optimized for sustained high-load performance and refined daily usability.
Fitted to models such as the Cayenne Coupé Turbo S (92A), Panamera Turbo S (971), and limited-run Sport Turismo variants, the MDD.NC blends motorsport-derived thermal resilience with luxury refinement. Emissions compliance is achieved through port + direct injection (PFI + DI), a gasoline particulate filter (GPF), and cooled exhaust gas recirculation (EGR), meeting Euro 6d standards.
One documented concern is premature degradation of the turbocharger oil feed restrictors under repeated track use, highlighted in Porsche Technical Service Bulletin TSB-2021-17. This can lead to coking and reduced oil flow to turbo bearings, causing premature shaft wear. From 2022, revised restrictors with larger internal passages and improved metallurgy were introduced across all production lines.
All production years (2020–present) meet Euro 6d emissions standards across EU and UK markets (VCA UK Type Approval #VCA/EMS/3812).
The Porsche MDD.NC is a 3,997 cc twin‑turbo V8 petrol engine engineered for performance SUVs and sedans (2020–present). It combines port and direct fuel injection with twin variable-geometry turbochargers to deliver immediate torque and sustained high-rpm refinement. Designed to meet Euro 6d standards globally, it integrates advanced thermal and emissions control for both track and urban compliance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 3,997 cc | |
| Fuel type | Petrol (RON 95 min, RON 98 optimal) | |
| Configuration | V8, DOHC, 32‑valve, 90° bank angle | |
| Aspiration | Twin‑turbocharged | |
| Bore × stroke | 102.0 mm × 122.0 mm | |
| Power output | 463 kW (630 PS) @ 6,000 rpm | |
| Torque | 850 Nm @ 2,300–4,500 rpm | |
| Fuel system | Combined port + direct injection (PFI + DI), Bosch HDEV6 | |
| Emissions standard | Euro 6d (including RDE compliance) | |
| Compression ratio | 9.8:1 | |
| Cooling system | Triple-circuit water-cooled with auxiliary oil and charge air coolers | |
| Turbocharger | Twin variable‑geometry turbochargers (BorgWarner) | |
| Timing system | Chain-driven DOHC with hydraulic tensioners | |
| Oil type | Porsche C3 specification (e.g., Mobil 1 ESP 0W-40) | |
| Dry weight | 238 kg |
The twin-turbo V8 delivers explosive mid-range thrust and 300+ km/h capability but demands meticulous maintenance. Use of RON 98 fuel is strongly recommended for full power delivery and knock prevention. Oil changes with Porsche C3 0W-40 must occur every 10,000 km or 12 months to protect turbo bearings and GPF. Extended idling or short-trip driving may saturate the GPF, triggering regeneration cycles. Early turbo oil restrictors (2020–2021) are prone to coking under track use—revised parts are available per TSB-2021-17. Intake valve deposits are minimal due to port injection, but fuel quality remains critical for injector longevity.
Oil Specs: Requires Porsche C3 specification oil (e.g., ACEA C3 with OEM validation) as defined in Technical Bulletin TSB-1938-05.
Emissions: Euro 6d certification includes real-driving emissions (RDE) compliance across all MY2020–present models (VCA Type Approval #VCA/EMS/3812).
Power Ratings: Measured per ISO 1585. Full 630 PS output requires RON 98 fuel (Porsche TIS MDD-NC-009).
Porsche Technical Information System (TIS): Docs MDD-NC-001 through MDD-NC-009
Porsche Service Information Bulletin (SIB) 26 11 21
VCA Type Approval Database (VCA/EMS/3812)
EU Regulation (EU) 2017/1151 (WLTP and RDE)
The Porsche MDD.NC was used across Porsche's 92A and 971 platforms with longitudinal mounting and shared modular architecture. This engine received platform-specific adaptations—enhanced cooling in the Cayenne Coupé Turbo S and exhaust tuning in the Panamera Turbo S—and from 2022 the facelifted variants adopted revised turbo oil restrictors and engine mounts, creating minor interchange limits. All adaptations are documented in OEM technical bulletins.
Engine code 'MDD.NC' is stamped on the left cylinder bank near the rear exhaust manifold (Porsche TIS MDD-ID-01). The 7th VIN digit is 'D' for this engine family. Visual identification: black composite intake manifold with twin BorgWarner turbo housings and integrated GPF in the exhaust downpipes. Differentiate from MCT.MA by higher torque calibration, revised cam profiles, and triple-radiator cooling layout. Pre-2022 and post-2022 turbo oil restrictor part numbers differ (Porsche TSB-2021-17); verify via engine serial number before replacement.
The MDD.NC's primary reliability concern is turbocharger oil restrictor coking under repeated high-load track sessions, with elevated incidence in 2020–2021 model-year vehicles. Porsche internal data (2022) indicates ~5% of early Cayenne Turbo S units required restrictor replacement before 30,000 km under aggressive use, while UK DVSA records show no emissions failures due to robust GPF design. Extended high-load operation without cooldown accelerates deposit formation, making revised hardware and proper driving protocols critical for turbo longevity.
Analysis derived from Porsche technical bulletins (2020–2025) and UK DVSA failure statistics (2020–2025). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about PORSCHE MDD-NC.
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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