The Alfa Romeo 939 B3.000 is a 1,750 cc, inline — four turbocharged petrol engine produced between 2015 and 2023. Developed as part of the Global Medium Engine family, it features direct fuel injection, variable valve timing (Dual VVT), and a compact turbocharger layout. It delivers 147 kW (200 PS) in standard tune, with peak torque of 330 Nm available from 1,700 rpm, providing responsive performance across urban and highway driving conditions.
Fitted to key Alfa Romeo pla…
Production years 2015–2018 meet Euro 6b standards; 2019–2023 models comply with Euro 6d-TEMP or Euro 6d depending on market and GPF inclusion .
The Alfa Romeo 939 B3.000 is a 1,750 cc inline-four turbo-petrol engine engineered for premium compact and mid-size vehicles (2015–2023). It combines direct fuel injection with dual variable valve timing and a single-scroll turbocharger to deliver strong mid-range torque and sporty throttle response. Designed to meet evolving Euro 6 emissions standards, it balances performance with regulatory compliance and real-world drivability.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,750 cc | |
Fuel type | Petrol (Unleaded, 95 RON min) | |
Configuration | Inline-4, DOHC, 16-valve | |
Aspiration | Turbocharged | |
Bore × stroke | 88.3 mm × 71.5 mm | |
Power output | 147 kW (200 PS) @ 5,700 rpm | |
Torque | 330 Nm @ 1,700–4,500 rpm | |
Fuel system | High-pressure direct injection (up to 200 bar) | |
Emissions standard | Euro 6b (pre-2019); Euro 6d-TEMP/d (2019–2023) | |
Compression ratio | 9.8:1 | |
Cooling system | Water-cooled, electric thermostat | |
Turbocharger | Single-scroll turbo with vacuum-actuated wastegate | |
Timing system | Chain-driven (integrated into oil circuit) | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 128 kg |
The Alfa Romeo 939 B3.000 was used across Alfa Romeo's Giulia and Stelvio platforms with longitudinal mounting and adapted for transverse applications in Jeep models under FCA platform sharing. This engine received platform-specific adaptations-intake tuning in the Giulia and reinforced mounts in the Stelvio-and from 2020, GPF integration for Euro 6d compliance created interchange limits. All adaptations are documented in OEM technical bulletins.
Engine Finders UK Ltd, which operates EngineCode.uk, can pass your enquiry to engine suppliers in the UK. The service is for vehicles in the United Kingdom, with UK delivery or fitting. This is a commercially connected service, and sending an enquiry does not confirm diagnosis or compatibility.
Diagnostic reminder: If a technician has recommended replacing the engine, you can send an enquiry to engine suppliers in the UK. Confirm the diagnosis first: an engine-code record does not diagnose a fault.
Field reports and technical service bulletins highlight component wear patterns under high-load operation. Adherence to manufacturer service intervals and approved fluid specifications is critical for long-term reliability.
Analysis derived from manufacturer technical service bulletins and industry workshop records. 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 939 B3.000 offers strong performance and efficiency, but pre-2021 models have a documented risk of turbo wastegate actuator issues. Later revisions (2021+) with updated hardware and ECU calibration show improved reliability. When maintained with high-quality oil, fuel, and regular services, these engines can reliably exceed 150,000 km. Driving pattern significantly affects longevity, especially for GPF-equipped variants.
The most frequent issues include turbo wastegate actuator sticking (especially pre-2021), gasoline particulate filter (GPF) clogging in city-driven models, and intake valve carbon buildup due to direct injection. Oil leaks from the valve cover and turbo seals are also reported as the engine ages. These concerns are documented in Alfa Romeo service information bulletins and field reports.
The 939 B3.000 powers the Alfa Romeo Giulia (2015–2023) and Stelvio (2017–2023) in their 2.0 Turbo 200 HP configuration. It was also used in European-market Jeep Renegade and Compass models (2016–2021) under FCA platform sharing. The engine is longitudinally mounted in Alfa models and transversely in Jeep applications, with minor calibration differences.
Aftermarket ECU tuning is common on the 939B3000 platform, but increasing boost or altering engine parameters accelerates component wear, impacts emissions compliance, and may void vehicle warranties. Any modifications should be evaluated carefully by a qualified specialist.
In the Giulia 2.0 Turbo, official combined consumption is ~7.2 L/100km (39 mpg UK). Real-world figures vary: 8–9 L/100km (31–35 mpg UK) in city driving, 6–7 L/100km (40–47 mpg UK) on highways. Driving style and transmission (manual vs. Q4 AWD) significantly affect results. GPF-equipped models may see slightly higher consumption under frequent urban use.
Yes, the 939 B3.000 is an interference engine. If the timing chain fails or jumps, piston-to-valve contact is likely, resulting in severe internal damage. While the chain is designed for the engine's life, any unusual noise from the front of the engine should be investigated immediately to prevent catastrophic failure.
Alfa Romeo specifies SAE 0W-30 oil meeting ACEA C2 or C3 standards. BMW Longlife-04 or MB 229.51 compliant oils are acceptable. Oil changes should not exceed 15,000 km or 1 year. Proper oil selection is critical for turbo bearing and timing chain lubrication, especially under high-temperature operation.
Comprehensive technical documentation and regulatory references
EngineCode.uk is operated by Engine Finders UK Ltd. It provides engine-reference information and an optional commercial enquiry service. It is not an official manufacturer website. Check the record's sources and confirm vehicle-specific details before relying on it for parts, repairs or replacement.
Our editorial standard prioritises relevant manufacturer documentation and official regulatory sources. The sources and verification status for a record should be checked alongside the data.
A statement is not verified merely because a source is listed. Where supporting evidence is missing or conflicting, the record should identify that limitation. Please report unsupported or inconsistent information.
Transparency in gaps
A missing or unverified value does not mean the manufacturer has withheld it. We distinguish information not yet verified, information not available to us, and information explicitly not disclosed by the source.
Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
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.
Records are subject to review and correction. Source links, dates and verification notes should be read with the technical information. Our Editorial and Sourcing Policy explains our standards and review process.
Found an error or missing source? Report a problem with this page. Include the field or statement concerned and a supporting source if available. You can also email corrections@enginecode.uk.
Copyright and permissions
Images and other material may be protected by copyright. Attribution does not by itself grant permission to reuse material. If you believe material on this site infringes your rights, contact copyrights@enginecode.uk with the page URL and details of your claim. We will review the material and take appropriate action.
Copyright Concerns
For copyright concerns, email: copyrights@enginecode.uk
Our Privacy Policy explains how Engine Finders UK Ltd uses information from visits, vehicle lookups, enquiries and messages. Our Cookie Policy explains cookies and similar technologies and how to change your choices.
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.
Ownership and commercial services
EngineCode.uk is owned and operated by Engine Finders UK Ltd. Alongside our reference content, we offer an optional replacement-engine enquiry service through Engine Finders and may identify relevant services provided by businesses connected with us. These commercial connections are disclosed. Using an enquiry service is not required to read our reference content.
Engine Finders UK Ltd operates this website. Our optional enquiry service has a commercial purpose. Our Ownership and Commercial Disclosure explains the relationship between the reference website and that service. Participating suppliers pay a fee or subscription to participate on the network and receive quote requests.
Use this record as a starting point for identification. Specifications and vehicle applications may contain errors or omissions. Confirm the exact engine variant and compatibility using vehicle-specific documentation and a qualified supplier or technician.
All external links open in new tabs. Please verify current availability of resources.