The Alfa Romeo AR 31000 is a 1,995 cc, inline — four turbocharged petrol engine produced between 2023 and 2024. It features gasoline direct injection (GDI), dual overhead camshafts (DOHC), and a twin — scroll turbocharger, delivering 245 kW (333 PS) at 6,500 rpm and 450 Nm of torque from 2,500–5,000 rpm. This engine was engineered as the high — performance powertrain for Alfa Romeo’s premium sports sedan and SUV, offering supercar — level output in a compact four — cylinder fo…
All production years 2023–2024 meet Euro 6d-TEMP emissions standards (VCA UK Type Approval #VCA/EMS/8100).
The Alfa Romeo AR 31000 is a 1,995 cc inline-four turbocharged petrol engine designed for high-performance applications (2023–2024). It utilizes gasoline direct injection and a twin-scroll turbocharger to deliver aggressive throttle response and strong mid-range torque. Designed to meet Euro 6d-TEMP emissions standards, it balances extreme 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 | 245 kW (333 PS) @ 6,500 rpm | |
Torque | 450 Nm @ 2,500–5,000 rpm | |
Fuel system | Bosch HDEV6 direct injection (up to 350 bar) | |
Emissions standard | Euro 6d-TEMP | |
Compression ratio | 9.0:1 | |
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-40) | |
Dry weight | 145 kg |
The Alfa Romeo AR 31000 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 2024 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 31000's primary reliability risk is high-pressure fuel pump drive wear on early builds, with elevated incidence in track or high-RPM use. Internal Alfa Romeo quality reports from 2024 noted a significant share of pre-2024 engines requiring pump replacement before 70,000 km, while UK DVSA records indicate fuel system DTCs as a leading cause of emissions test failures. Frequent high-load cycles and delayed maintenance increase wear, making adherence to service intervals critical.
Analysis derived from Alfa Romeo technical bulletins (2023-2024) and UK DVSA failure statistics (2023-2024). 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 31000 offers exceptional performance and engineering quality, but early models (2023-2023) had reliability concerns, particularly high-pressure fuel pump drive failures. Later revisions (post-2024) improved durability, so well-maintained examples can be robust. Regular servicing and using correct oil (0W-40 Fiat 9.55535-S2) are essential for longevity, especially under high-load conditions.
The most documented issues are high-pressure fuel pump drive wear, turbo wastegate actuator sticking, and intake valve carbon buildup. Coolant leaks from the water pump are also frequent after 60,000 km. These are confirmed in Alfa Romeo service bulletins and field reports.
This 2.0L high-output turbo petrol engine was used in the Giulia (952) and Stelvio (956). It powered 2.0 Turbo 333 HP variants from 2023 to 2024. All models require premium 98 RON fuel and specific performance maintenance protocols.
Yes, but cautiously. The AR 31000 responds to ECU remapping, with Stage 1 tunes typically adding +20-30 kW safely. However, stock internals are near their limit, so significant gains require forged components. 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 333 HP, combined consumption is approximately 10.1 L/100 km (~28 mpg UK). Real-world figures vary: aggressive driving may see 14–16 L/100 km, while highway runs can achieve 8.5 L/100 km (~33 mpg UK). Driving style significantly impacts efficiency due to high-performance tuning.
Yes. The AR 31000 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, especially given the high-revving nature of this engine.
Alfa Romeo specifies a 0W-40 synthetic oil meeting Fiat 9.55535-S2 specification. This higher-viscosity oil ensures proper turbo and valve train lubrication under high-stress conditions. 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.