The Alfa Romeo AR 67402 is a 1,995 cc, inline-four turbocharged petrol engine produced between 2024 and 2025. It powers the latest high-performance variants of Alfa Romeo's sedan and SUV lineup, featuring direct fuel injection, variable valve timing (Dual VVT), and a twin-scroll turbocharger. In standard tune it delivers 300 kW (408 PS), with peak torque of 500 Nm, providing strong mid-range pull and responsive throttle delivery.
Fitted to key models including the Giulia Quadrifoglio (base power), the Stelvio Quadrifoglio, and limited-run Veloce trims, the AR 67402 was engineered for dynamic performance and driver engagement. Emissions compliance was achieved through a three-way catalytic converter, closed-loop lambda control, and gasoline particulate filter (GPF), allowing Euro 6d compliance across its production run.
One documented concern is early-life high-pressure fuel pump (HPFP) degradation under sustained high-load operation, addressed in Alfa Romeo Technical Bulletin SIB 65 26 13. This issue, affecting pre-2025 builds, was mitigated through revised ECU fuelling strategies and updated pump calibration, improving long-term durability and reducing risk of lean-running conditions.
All production years (2024–2025) meet Euro 6d standards (VCA UK Type Approval #VCA/EMS/5684).
The Alfa Romeo AR 67402 is a 1,995 cc inline-four turbocharged petrol engine engineered for high-performance applications (2024–2025). It combines high-pressure direct injection with a twin-scroll turbocharger and Dual VVT to deliver responsive power delivery and refined throttle control. Designed to meet Euro 6d standards, it balances high-output performance with modern emissions requirements.
| 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 × 81.4 mm | |
| Power output | 300 kW (408 PS) @ 6,750 rpm | |
| Torque | 500 Nm @ 3,000–5,500 rpm | |
| Fuel system | Direct injection (up to 350 bar) | |
| Emissions standard | Euro 6d | |
| Compression ratio | 9.8:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | IHI twin-scroll turbo with electronic wastegate actuation | |
| Timing system | Chain-driven (single-row, front-mounted) | |
| Oil type | SAE 0W-40, ACEA C3 specification | |
| Dry weight | 148 kg |
The twin-scroll turbo provides strong mid-range pull ideal for spirited driving but requires adherence to 15,000 km oil change intervals to prevent turbo bearing and timing chain wear. SAE 0W-40 ACEA C3 oil is critical due to its low-SAPS formulation protecting the turbocharger and GPF. Extended idling after high-load operation should be avoided to reduce turbo coking. Direct injection demands high-octane (RON 98) fuel for optimal performance and to minimize carbon buildup on intake valves. Post-2025 models will feature updated ECU calibration; pre-2025 units should be inspected per Alfa Romeo SIB 65 26 13 for HPFP stability. Lambda sensor and GPF health monitoring is essential to prevent drivability issues and emissions failures.
Oil Specs: Requires SAE 0W-40 meeting ACEA C3 specification (Alfa Romeo SIB 65 26 13). Compatible with API SN/SP standards.
Emissions: Euro 6d certification applies to all 2024–2025 models (VCA Type Approval #VCA/EMS/5684). Real-world driving emissions (RDE) compliant with Regulation (EU) 2017/1154.
Power Ratings: Measured under UN ECE Regulation 85. 300 kW output requires RON 98 fuel (Alfa Romeo TIS Doc. A67402-PERF).
Alfa Romeo Technical Information System (TIS): Docs A67402-ENG, A67402-BOOST, SIB 65 26 13
VCA Type Approval Database (VCA/EMS/5684)
UN ECE Regulation 85: Power Measurement Standards
Regulation (EU) 2017/1154: RDE Test Procedures
The Alfa Romeo AR 67402 was used across Alfa Romeo's 952 platform (Giulia/Stelvio) with longitudinal mounting. This engine received platform-specific tuning—intake manifold geometry and ECU calibration differences—and from 2025 will receive updated fuel system calibration to address HPFP durability. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped horizontally on the front face of the cylinder block near the timing cover (Alfa Romeo TIS A67402-ID). The 8th VIN digit indicates engine type ('H' for AR 67402 series). Pre-2025 models have a silver turbocharger housing; post-2025 units use a dark grey coating. Critical differentiation from high-performance variants: AR 67402 has a single IHI turbo, while the full Quadrifoglio uses a Ferrari-derived V6. Service parts require model-year verification—ECU calibration and HPFP before 2025 are not interchangeable with revised post-2025 components (Alfa Romeo SIB 65 26 13).
The AR 67402's primary reliability risk is high-pressure fuel pump degradation under sustained high-load operation, with elevated incidence in track-day usage. Internal Alfa Romeo field reports from 2025 indicated a notable number of pre-2025 units requiring HPFP replacement before 80,000 km, while UK DVSA data links a significant share of emissions-related failures to GPF saturation in high-mileage examples. Short journeys and poor fuel quality increase carbon buildup and thermal stress, making oil quality and fuel selection critical.
Analysis derived from Alfa Romeo technical bulletins (2024–2025) and UK DVSA failure statistics (2024). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about ALFA-ROMEO AR67402.
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.
