The Alfa Romeo AR 30558 is a 1,995 cc, inline — four turbocharged petrol engine produced between 2019 and 2024. It features direct fuel injection, dual overhead camshafts (DOHC), and variable valve timing (VVT) on both intake and exhaust. In standard tune, it delivers 206 kW (280 PS) at 5,700 rpm and 400 Nm of torque at 2,500–4,500 rpm, providing strong mid — range performance and responsive driving dynamics.
Fitted to the Giulia and Stelvio Quadrifoglio models, the AR 30558…
All AR 30558 engines comply with Euro 6d-TEMP emissions standards (VCA UK Type Approval #VCA/EMS/8901).
The Alfa Romeo AR 30558 is a 1,995 cc inline-four turbocharged petrol engine engineered for high-performance models (2019–2024). It combines direct fuel injection with dual variable valve timing and a twin-scroll turbocharger to deliver sharp throttle response and high specific output. Designed to meet Euro 6d-TEMP standards, it balances track-ready performance with regulated emissions compliance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,995 cc | |
Fuel type | Petrol | |
Configuration | Inline-4, DOHC, 16-valve | |
Aspiration | Turbocharged (IHI twin-scroll) | |
Bore × stroke | 88.0 mm × 81.4 mm | |
Power output | 206 kW (280 PS) @ 5,700 rpm | |
Torque | 400 Nm @ 2,500–4,500 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 electronic wastegate | |
Timing system | Chain-driven DOHC | |
Oil type | Fiat 9.55535-S2 (SAE 0W-30) | |
Dry weight | 135 kg |
The Alfa Romeo AR 30558 was used across Alfa Romeo's 952 platform with longitudinal mounting. This engine received platform-specific adaptations-revised intake manifolds in the Stelvio Quadrifoglio and higher-boost calibrations in the Giulia Quadrifoglio-and from 2022 received an updated high-pressure fuel pump design, creating interchange limits. All adaptations are documented in OEM technical bulletins.
The AR 30558's primary reliability risk is high-pressure fuel pump (HPFP) wear, particularly in vehicles with frequent high-load or track use. Alfa Romeo internal service reports from 2023 indicated over 25% of pre-2022 units required HPFP replacement before 80,000 km, while UK DVSA MOT data links a notable share of fuel system failures to HPFP-related DTCs. High underhood temperatures and low-octane fuel increase wear, making adherence to fuel quality and service intervals critical.
Analysis derived from Alfa Romeo technical bulletins (2019-2024) 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 30558 delivers exceptional performance and responsiveness, but pre-2022 models are prone to high-pressure fuel pump wear if low-octane fuel is used. Later revisions (post-2022) improved HPFP durability, so well-maintained examples can exceed 120,000 km. Regular servicing and using high-quality oil (0W-30 Fiat 9.55535-S2) and 98 RON fuel greatly aid longevity.
The most documented issues are high-pressure fuel pump wear, turbo wastegate actuator failure, intake valve carbon buildup, and oil consumption. These are confirmed in Alfa Romeo service bulletins and technical circulars, particularly affecting early production units. Adhering to service intervals and using premium fuel reduces risk.
This 2.0L turbo petrol engine was used in the Alfa Romeo Giulia Quadrifoglio (2.0 Turbo 280 HP) from 2019–2024 and the Stelvio Quadrifoglio (2.0 Turbo 280 HP) from 2020–2024. All models comply with Euro 6d-TEMP standards under VCA Type Approval #VCA/EMS/8901.
Yes. The AR 30558 responds well to ECU remapping. Stage 1 tunes typically add +40-60 kW, especially on stock 280 HP variants. Upgraded intercoolers, exhausts, and supporting mods allow further gains. However, high-boost tuning increases stress on turbos and fuel systems, so professional calibration and monitoring are essential.
Moderate to high. In a Giulia Quadrifoglio 2.0 Turbo (280 HP), combined consumption is ~10.2 L/100km (~27.7 mpg UK). Real-world figures vary: city driving may see 13-15 L/100km, while highway runs achieve 7.5 L/100km. Performance driving significantly increases fuel use. Always use 98 RON premium unleaded for optimal performance and emissions control.
Yes. The AR 30558 is an interference engine. If the timing chain fails or skips, pistons will contact open valves, causing catastrophic internal damage. Chain replacement is recommended every 120,000 km per Alfa Romeo maintenance schedule. Any abnormal noise from the timing cover should be investigated immediately.
Alfa Romeo specifies a 0W-30 synthetic oil meeting Fiat 9.55535-S2 specification. This low-SAPS oil is critical for turbocharger and variable valve timing longevity. Change intervals are 15,000 km or 24 months, whichever comes first. Using non-compliant oil may void warranty and accelerate wear.
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.