The Porsche MCN.CC is a 3,996 cc, water‑cooled twin‑turbocharged V8 petrol engine produced from 2020 onward. It features Bosch MEVD 17.5.40 engine management, dual overhead camshafts per bank (DOHC), and a 32‑valve layout. In the Cayenne Coupé Turbo GT it delivers 471 kW (640 PS) and 850 Nm of torque, with a redline of 6,800 rpm.
Fitted exclusively to high — performance Cayenne derivatives such as the Turbo GT, the MCN.CC represents Porsche’s highest — output V8 for SUV appl…
Production years 2020–present meet Euro 6d emissions standards under EU Regulation (EU) 2018/858 .
The Porsche MCN.CC is a 3,996 cc twin‑turbocharged V8 petrol engine engineered for the Cayenne Turbo GT and select Panamera Turbo S E-Hybrid applications (2020–present). It combines Bosch MEVD 17.5.40 engine management with twin twin-scroll turbochargers, direct fuel injection, and DOHC architecture to deliver immense torque from low rpm and high-rpm responsiveness. Designed to meet Euro 6d emissions through gasoline particulate filters and on-board diagnostics, it balances motorsport-derived performance with regulatory compliance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 3,996 cc | |
Fuel type | Petrol (Unleaded) | |
Configuration | V8, DOHC, 32‑valve | |
Aspiration | Twin-turbocharged | |
Bore × stroke | 86.0 mm × 86.0 mm | |
Power output | 471 kW (640 PS) | |
Torque | 850 Nm @ 2,300–4,500 rpm | |
Fuel system | Bosch MEVD 17.5.40 direct injection (350 bar) | |
Emissions standard | Euro 6d | |
Compression ratio | 10.1:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Twin twin-scroll turbochargers (Garrett) | |
Timing system | Chain-driven DOHC with hydraulic tensioners | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 225 kg |
The Porsche MCN.CC was used in Porsche's Cayenne and Panamera platforms with front-engine, longitudinal mounting and no external licensing. This engine powers the Cayenne Coupé Turbo GT and select Panamera Turbo S E-Hybrid models, with identical architecture but different boost and hybrid integration. All adaptations are documented in OEM technical bulletins.
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The MCN.CC's primary reliability risk is high-pressure fuel pump (HPFP) cam follower wear, with elevated incidence in track or high-load use exceeding 60,000 km. Porsche internal data from 2022 indicated over 9 % of Turbo GT engines required HPFP or follower replacement before 90,000 km, while specialist workshops correlate non-C4 oil use with GPF clogging and regeneration faults. Extended full-load operation without cooldown cycles accelerates turbo bearing wear, making thermal management and oil specification critical.
Analysis derived from Porsche technical bulletins (2020–2023) and UK specialist workshop data (2021–2023). 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
The MCN.CC delivers exceptional performance but demands disciplined maintenance. HPFP cam follower wear is a known risk in high-load use—inspection at 80,000 km is recommended. Using only C4-spec oil and premium fuel ensures GPF and turbo longevity. Well-maintained examples can exceed 120,000 km without major issues.
Top issues include HPFP cam follower wear, GPF clogging from non-C4 oil, turbo oil coking, and intake valve carbon buildup. Porsche addressed the follower issue in SIB 9YP/04/21. The direct injection system requires proactive carbon cleaning.
Exclusively the Cayenne Coupé Turbo GT (2021–present) and Panamera Turbo S E-Hybrid (2020–present). It is the highest-output 4.0L V8 in Porsche’s current SUV and sedan lineup, engineered for track-capable performance.
Aftermarket ECU tuning is common on the MCN-CC platform, but increasing boost or altering engine parameters accelerates component wear, impacts emissions compliance, and may void vehicle warranties. Any modifications should be evaluated carefully by a qualified specialist.
Approximately 14.2 L/100km (city) and 9.1 L/100km (highway), or ~20 mpg UK combined. Aggressive driving can exceed 19 L/100km. GPF regeneration and hybrid assist (in Panamera) improve real-world efficiency.
Yes. The MCN.CC is an interference engine—pistons and valves occupy the same space if timing fails. Chain-driven DOHC with hydraulic tensioners is generally robust, but debris from HPFP failure can cause secondary damage.
Porsche specifies ACEA C4 0W‑40 synthetic oil (e.g., Porsche C4). Change oil every 12,000 km or 12 months—whichever comes first—and never use non-C4 oils to prevent GPF clogging.
Comprehensive technical documentation and regulatory references
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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.
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