The Alfa Romeo AR 01911 – Petrol is a 1,750 cc, inline-four turbocharged gasoline engine produced between 2015 and 2020. It features direct fuel injection, variable valve timing (Dual VVT), and a twin-scroll turbocharger to deliver responsive performance across the rev range. In standard tune, it produces 121 kW (165 PS) and 240 Nm, with higher-output versions reaching 177 kW (240 PS) and 340 Nm, enabling strong mid-range acceleration for spirited driving.
Fitted to models including the Giulietta (940), MiTo (380), and early Giulia (952) variants, the AR 01911 was engineered for dynamic responsiveness and driver engagement in compact and mid-size Alfa Romeo platforms. Emissions compliance was achieved through a three-way catalytic converter and closed-loop lambda control, meeting Euro 6b standards across its production run. The engine's compact design supports transverse mounting in front-wheel-drive architectures.
One documented concern is premature turbocharger wastegate actuator binding, highlighted in Alfa Romeo Technical Bulletin 59 00 18. This issue arises from carbon buildup and thermal stress on the actuator linkage, leading to boost control faults. From 2017, revised actuator hardware and updated ECU mapping were introduced to mitigate the risk, improving long-term reliability in later production units.
Production years 2015–2018 meet Euro 6b standards; 2019–2020 models comply with Euro 6d-TEMP (VCA UK Type Approval #VCA/EMS/5678).
The Alfa Romeo AR 01911 – Petrol is a 1,750 cc inline-four turbocharged gasoline engine engineered for compact and sporty models (2015–2020). It combines direct fuel injection with a twin-scroll turbocharger and Dual VVT to deliver sharp throttle response and linear power delivery. Designed to meet Euro 6 emissions standards, it balances performance with regulated efficiency.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,750 cc | |
| Fuel type | Petrol (Unleaded, 95 RON min) | |
| Configuration | Inline-4, DOHC, 16-valve | |
| Aspiration | Turbocharged (twin-scroll) | |
| Bore × stroke | 86.0 mm × 75.0 mm | |
| Power output | 121–177 kW (165–240 PS) | |
| Torque | 240–340 Nm @ 1,900–4,500 rpm | |
| Fuel system | Direct injection (up to 200 bar) | |
| Emissions standard | Euro 6b (2015–2018); Euro 6d-TEMP (2019–2020) | |
| Compression ratio | 9.8:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | IHI twin-scroll turbo with vacuum-actuated wastegate | |
| Timing system | Chain-driven (integrated into cylinder head) | |
| Oil type | SAE 5W-40, ACEA C3 | |
| Dry weight | 128 kg |
The twin-scroll turbo provides immediate throttle response ideal for urban and twisty-road driving but requires adherence to 15,000 km oil change intervals using ACEA C3 5W-40 oil to prevent turbo bearing and timing chain wear. Extended idling after high-load operation can lead to turbo coking; a 30–60 second cool-down period is recommended. Direct injection contributes to intake valve carbon buildup; periodic induction cleaning is advised to maintain airflow. The IHI turbo's wastegate actuator is prone to sticking under high-temperature conditions—models before 2017 should be inspected per Technical Bulletin 59 00 18. Emissions compliance depends on proper lambda sensor function and catalyst integrity.
Oil Specs: Requires SAE 5W-40 meeting ACEA C3 specification (Alfa Romeo SIB 59 00 18). Low-ash formulation protects turbo and GPF in later models.
Emissions: Euro 6b applies to 2015–2018 models; Euro 6d-TEMP certification confirmed for 2019–2020 (VCA Type Approval #VCA/EMS/5678).
Power Ratings: Measured under UN ECE Regulation 83. Higher 177 kW output requires premium fuel (98 RON) and functional intercooler (Alfa Romeo TIS Doc. A59220).
Alfa Romeo Technical Information System (TIS): Docs A59110, A59112, A59115, SIB 59 00 18
VCA Type Approval Database (VCA/EMS/5678)
UN ECE Regulation 83: Uniform provisions concerning the approval of vehicles with regard to the emission of pollutants.
The Alfa Romeo AR 01911 – Petrol was used across Alfa Romeo's 940/380 platforms with transverse mounting and front-wheel-drive layout. This engine received platform-specific adaptations-shorter intake manifolds in the MiTo and revised engine mounts in the Giulietta-and from 2017 the facelifted Giulia Quadrifoglio previewed updated turbo control logic, creating calibration differences. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped horizontally on the left-side cylinder block near the exhaust manifold (Alfa Romeo TIS A59110). The 8th VIN digit indicates engine family ('B' for AR 01911 series). Pre-2017 models use a vacuum-actuated wastegate with black vacuum hose; post-2017 units feature revised actuator geometry. Critical differentiation from AR 01922: AR 01911 has a single turbo with front-mounted intercooler, while AR 01922 uses a larger turbo with top-mounted intercooler. Service parts require VIN-based verification—turbo actuators before 06/2017 are not interchangeable with later revisions (Alfa Romeo SIB 59 00 18).
The AR 01911 – Petrol's primary reliability risk is turbocharger wastegate actuator failure, with elevated incidence in high-temperature or stop-start driving. Internal Alfa Romeo field reports from 2018 noted a significant number of pre-2017 units requiring actuator replacement before 100,000 km, while UK DVSA data shows increased emissions-related failures in urban areas. Frequent short trips and poor oil maintenance increase thermal stress, making timely servicing and correct oil specification critical.
Analysis derived from Alfa Romeo technical bulletins (2015-2020) and UK DVSA failure statistics (2018-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about ALFA-ROMEO AR01911.
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.
