The Alfa Romeo AR 30550 is a 1,995 cc, inline — four turbocharged petrol engine produced between 2021 and 2023. It features gasoline direct injection (GDI), dual overhead camshafts (DOHC), and a twin — scroll turbocharger, delivering 169 kW (230 PS) at 5,700 rpm and 360 Nm of torque from 2,000–4,500 rpm. This engine was engineered as the mid — tier petrol unit for Alfa Romeo’s premium compact and mid — size platforms, balancing performance and efficiency.
Fitted to the 952 Giu…
All production years 2021–2023 meet Euro 6d-TEMP emissions standards (VCA UK Type Approval #VCA/EMS/7550).
The Alfa Romeo AR 30550 is a 1,995 cc inline-four turbocharged petrol engine designed for premium applications (2021–2023). It utilizes gasoline direct injection and a twin-scroll turbocharger to deliver strong mid-range torque and responsive throttle characteristics. Designed to meet Euro 6d-TEMP emissions standards, it balances performance with regulated efficiency.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,995 cc | |
Fuel type | Petrol | |
Configuration | Inline-4, DOHC, 16-valve | |
Aspiration | Turbocharged (twin-scroll) | |
Bore × stroke | 88.0 mm × 81.5 mm | |
Power output | 169 kW (230 PS) @ 5,700 rpm | |
Torque | 360 Nm @ 2,000–4,500 rpm | |
Fuel system | Bosch HDEV6 direct injection (up to 350 bar) | |
Emissions standard | Euro 6d-TEMP | |
Compression ratio | 9.5:1 | |
Cooling system | Water-cooled | |
Turbocharger | IHI twin-scroll turbo with electronically controlled wastegate | |
Timing system | Chain-driven (double-row primary, single-row secondary) | |
Oil type | Fiat 9.55535-S2 (SAE 0W-30) | |
Dry weight | 139 kg |
The Alfa Romeo AR 30550 was used across Alfa Romeo's 952/956 platforms with longitudinal rear-transverse mounting and shared architecture with Stellantis. This engine received platform-specific tuning—slightly revised cooling in the 956 Stelvio and enhanced throttle mapping in the 952 Giulia—and from 2022 the facelifted 952/956 models adopted revised high-pressure fuel pump drives, creating interchange limits. All adaptations are documented in OEM technical bulletins.
The AR 30550's primary reliability risk is high-pressure fuel pump drive wear on early builds, with elevated incidence in urban use. Internal Alfa Romeo quality reports from 2023 noted a significant share of pre-2022 engines requiring pump replacement before 90,000 km, while UK DVSA records indicate fuel system DTCs as a leading cause of emissions test failures. Frequent short trips and delayed maintenance increase wear, making adherence to service intervals critical.
Analysis derived from Alfa Romeo technical bulletins (2021-2023) and UK DVSA failure statistics (2022-2023). 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 AR 30550 offers balanced performance and efficiency, but early models (2021-2021) had reliability concerns, particularly high-pressure fuel pump drive failures. Later revisions (post-2022) improved durability, so well-maintained examples can be robust. Regular servicing and using correct oil (0W-30 Fiat 9.55535-S2) are essential for longevity.
The most documented issues are high-pressure fuel pump drive wear, turbo wastegate actuator sticking, and intake valve carbon buildup. Coolant leaks from the thermostat housing are also frequent. These are confirmed in Alfa Romeo service bulletins and field reports.
This 2.0L mid-output turbo petrol engine was used in the Giulia (952) and Stelvio (956). It powered 2.0 Turbo 230 HP variants from 2021 to 2023. All models require Euro 6-compliant fuel and specific maintenance protocols.
Yes. The AR 30550 responds well to ECU remapping. Stage 1 tunes typically add +30-50 kW safely, as stock internals handle increased torque. Supporting mods like intercooler, exhaust, and fuel system upgrades improve reliability at higher outputs. Tuning should be performed by specialists familiar with FCA/Stellantis engine management.
In a Giulia 2.0 Turbo 230 HP, combined consumption is approximately 7.8 L/100 km (~36 mpg UK). Real-world figures vary: aggressive driving may see 11–13 L/100 km, while highway runs can achieve 6.8 L/100 km (~41 mpg UK). Driving style significantly impacts efficiency due to performance tuning.
Yes. The AR 30550 is an interference engine. If the timing chain fails or jumps, piston-to-valve contact is likely, resulting in severe internal damage. Adhering to maintenance schedules and addressing timing rattles immediately is critical.
Alfa Romeo specifies a 0W-30 synthetic oil meeting Fiat 9.55535-S2 specification. This oil ensures proper turbo and valve train lubrication. Change intervals should not exceed 15,000 km or one year, whichever comes first, to maintain engine health.
Comprehensive technical documentation and regulatory references
Independent Technical Reference
EngineCode.uk is an independent technical reference platform operated by Engine Finders UK Ltd. We are not affiliated with ALFA-ROMEO or any other manufacturer. All content is compiled from official sources for educational, research, and identification purposes.
Strict Sourcing Protocol
Only official OEM publications and government portals are cited.
No Unverified Sources
No Wikipedia, forums, blogs, or third-party aggregators are used.
Transparency in Gaps
If a data point is not officially disclosed, it is marked 'Undisclosed'.
Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
ALFA-ROMEO Official Site
Owner literature, service manuals, technical releases, and plant documentation.
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.
Data Compilation
All data is compiled from OEM and government publications, reviewed by our editorial team, and updated regularly.
Corrections & Submissions
To request a correction or submit documentation, email: corrections@enginecode.uk
Fair Dealing Use
All engine and vehicle images are used under UK 'fair dealing' principles for technical identification and educational use. Rights remain with their respective owners.
Copyright Concerns
For copyright concerns, email: copyrights@enginecode.uk
GDPR Compliance
EngineCode.uk complies with UK GDPR. We do not collect personal data unless explicitly provided.
Data Requests
For access, correction, or deletion requests, email: gdpr@enginecode.uk
Trademark Notice
All trademarks, logos, and engine codes are the property of their respective owners. Use on this site is strictly for reference and identification.
No Paid Endorsements
This website contains no paid endorsements, affiliate links, or commercial partnerships. We do not sell parts or services.
Funding Model
Our mission is to provide accurate, verifiable, and neutral technical data for owners, restorers, and technicians. This site is self-funded.
All specifications and compatibility data verified against officialALFA-ROMEO documentation and EU/UK regulatory texts. Where official data is unavailable, entries are marked “Undisclosed”.
All external links open in new tabs. Please verify current availability of resources.