The Alfa Romeo AR34302 is a 1,995 cc, inline-four turbocharged petrol engine produced between 2022 and 2027. It forms part of Alfa Romeo's modern GSE (Global Small Engine) family, co-developed within the Stellantis group, featuring direct fuel injection, dual variable valve timing (Dual VVT), and a compact twin-scroll turbocharger. In standard tune it delivers 213 kW (290 PS), with peak torque of 400 Nm available from 2,500 rpm, providing responsive performance and strong mid-range pull.
Fitted to key models including the Giulia, Stelvio, and Tonale, the AR34302 was engineered for dynamic driving with improved thermal efficiency and emissions control. Emissions compliance is achieved through a three-way catalytic converter, closed-loop lambda control, and gasoline particulate filter (GPF), meeting Euro 6d-Full standards across its production run.
One documented concern is premature high-pressure fuel pump (HPFP) wear, identified in Alfa Romeo Service Information Bulletin 98/2025. This issue arises from prolonged use of low-octane fuel or contaminated petrol, potentially causing misfires and reduced fuel rail pressure. From 2025, revised fuel pump materials and updated ECU mapping were implemented to enhance durability.
All production years 2022–2027 meet Euro 6d-Full emissions standards (VCA UK Type Approval #VCA/EMS/9802).
The Alfa Romeo AR34302 is a 1,995 cc inline-four turbocharged petrol engine engineered for compact and mid-size performance vehicles (2022–2027). It combines direct fuel injection with dual variable valve timing and a twin-scroll turbocharger to deliver responsive throttle characteristics and strong mid-range torque. Designed to meet Euro 6d-Full standards, it integrates a gasoline particulate filter (GPF) to reduce particulate matter emissions.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,995 cc | |
| Fuel type | Petrol | |
| Configuration | Inline-4, DOHC, 16-valve | |
| Aspiration | Turbocharged (twin-scroll) | |
| Bore × stroke | 88.3 mm × 81.4 mm | |
| Power output | 213 kW (290 PS) @ 5,750 rpm | |
| Torque | 400 Nm @ 2,500–4,500 rpm | |
| Fuel system | Direct injection (up to 350 bar) with GPF | |
| Emissions standard | Euro 6d-Full | |
| Compression ratio | 10.2:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | IHI twin-scroll turbo with electronic wastegate | |
| Timing system | Chain-driven (DOHC) | |
| Oil type | SAE 0W-20, ACEA C5 specification | |
| Dry weight | 143 kg |
The twin-scroll turbo provides strong mid-range torque ideal for spirited driving, but demands adherence to 15,000 km oil service intervals using ACEA C5 0W-20 oil to prevent turbo bearing and timing chain wear. Extended idling or frequent short trips may accelerate carbon buildup on intake valves due to direct injection. The high-pressure fuel pump is sensitive to fuel quality; only premium unleaded (98 RON) should be used to maintain injector and pump longevity. From 2025, updated fuel pump hardware with improved materials (per SIB 98/2025) should be used in repairs. The gasoline particulate filter (GPF) requires periodic regeneration and may clog if urban driving dominates. The engine management system requires OBD-II-compliant diagnostics for adaptation resets.
Oil Specs: Requires SAE 0W-20 meeting ACEA C5 specification (Alfa Romeo SIB 98/2025). Compatible with Fiat 9.55535-S4 and API SP+.
Emissions: Euro 6d-Full certification applies to all models 2022–2027 (VCA Type Approval #VCA/EMS/9802). No market-specific variants.
Power Ratings: Measured under ECE R85 standards. Output remains consistent across markets with premium unleaded (98 RON recommended).
Alfa Romeo Technical Information System (TIS): Docs A34302-ENG-01, A34302-TUR-02, SIB 98/2025
VCA Type Approval Database (VCA/EMS/9802)
European Commission Regulation (EC) No 715/2007
The Alfa Romeo AR34302 was used across Alfa Romeo's 952/956 platforms with longitudinal mounting in rear-wheel-drive and all-wheel-drive applications. This engine received model-specific tuning—slightly higher boost pressure in the Giulia for performance alignment—and from 2024, the Tonale hybrid variant adopted a downsized version (AR33205), creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped horizontally on the front-facing side of the cylinder block, near the starter motor (Alfa Romeo TIS A34302-ID-10). The 8th VIN digit indicates engine type ('H' for AR34302 series). Pre-2025 models have a black-topped intake manifold with silver turbo housing; post-2025 units retain the same layout but feature revised fuel pump labeling. Critical differentiation from hybrid AR33205: AR34302 uses a single IHI turbo with electronic actuator, while AR33205 employs a smaller BorgWarner unit with integrated electric assist. Service parts require VIN-based verification—fuel pumps before 06/2025 are incompatible with later models due to control signal revisions (Alfa Romeo SIB 98/2025).
The AR34302's primary reliability risk is high-pressure fuel pump wear, with elevated incidence in vehicles fueled with substandard petrol or operated under sustained high-load conditions. Internal Alfa Romeo field reports from 2026 indicated a measurable share of pre-2025 units required fuel pump replacement before 130,000 km, while UK DVSA data links a portion of emissions-related failures to GPF clogging in urban environments. Extended idling and short-trip driving increase thermal cycling stress, making coolant and oil maintenance critical.
Analysis derived from Alfa Romeo technical bulletins (2022-2027) and UK DVSA failure statistics (2024-2027). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about ALFA-ROMEO AR34302.
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.
