The Porsche MA1.22 is a 3,387 cc, water‑cooled flat‑six twin‑turbocharged petrol engine produced between 2015 and 2019. It featured Bosch Motronic ME 17.5 electronic fuel injection, dual overhead camshafts (DOHC), and a 24‑valve layout. In the 991 Turbo and Turbo S it delivered 397–412 kW (540–560 PS) and 660–710 Nm of torque, with a redline of 6,600 rpm.
Fitted exclusively to the 991 — generation 911 Turbo and Turbo S, the MA1.22 refined Porsche’s twin‑turbo flat‑six wit…
Production years 2015–2019 meet Euro 6 emissions standards under EU Regulation (EC) No 692/2008 .
The Porsche MA1.22 is a 3,387 cc flat‑six twin‑turbocharged petrol engine engineered for the 991 Turbo and Turbo S (2015–2019). It combines Bosch Motronic ME 17.5 engine management with twin VTG turbochargers, direct fuel injection, and DOHC architecture to deliver immense low-end torque and high-rpm responsiveness. Designed to meet Euro 6 emissions through gasoline particulate filters and closed-loop lambda control, it balances performance with regulatory compliance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 3,387 cc | |
Fuel type | Petrol (Unleaded) | |
Configuration | Flat‑6, DOHC, 24‑valve | |
Aspiration | Twin-turbocharged with VTG | |
Bore × stroke | 97.0 mm × 76.4 mm | |
Power output | 397–412 kW (540–560 PS) | |
Torque | 660–710 Nm @ 2,100–4,250 rpm | |
Fuel system | Bosch ME 17.5 direct injection (200 bar) with port injection assist | |
Emissions standard | Euro 6 | |
Compression ratio | 9.0:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Twin variable turbine geometry (VTG) turbochargers (Kühnle, Kopp & Kausch) | |
Timing system | Chain-driven DOHC with hydraulic tensioners | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 192 kg |
The Porsche MA1.22 was used exclusively in Porsche's 991 Turbo platform with rear-engine, longitudinal mounting and no external licensing. This engine powered both standard Turbo and high-output Turbo S variants, with identical architecture but different ECU mapping and intercooler tuning. From 2017, minor updates included revised wastegate actuators and GPF regeneration logic, creating minor service distinctions. All adaptations are documented in OEM technical bulletins.
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The MA1.22's primary reliability risk is high-pressure fuel pump (HPFP) cam follower wear, with elevated incidence in track or aggressive-driving examples exceeding 60,000 km. Porsche field data from 2018 indicated over 12 % of high-load 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 (2015–2019) and UK specialist workshop data (2019–2023). 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 MA1.22 delivers exceptional performance with near-lag-free response 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, VTG vacuum line degradation, and intake valve carbon buildup. Porsche addressed the follower issue in SIB 991/09/16. The direct injection system requires proactive carbon cleaning.
Exclusively the 991-generation 911 Turbo and Turbo S (2015–2019) in coupé and cabriolet forms. It was succeeded by the MA2.76 in the 992 Turbo. All are rear-engine, all-wheel-drive grand tourers with wide-body styling.
Aftermarket ECU tuning is common on the MA1-22 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 13.8 L/100km (city) and 8.9 L/100km (highway), or ~20 mpg UK combined. Aggressive driving can exceed 18 L/100km. The VTG system improves part-throttle efficiency, but GPF regeneration can increase consumption.
Yes. The MA1.22 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 5W‑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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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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