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 mod…
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 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.
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.
The most common questions about engine codes, what they mean, how to find them and how this database works
The AR 01911 – Petrol offers strong performance and responsiveness, but pre-2017 models have a known issue with turbo wastegate actuator binding. Later revisions (post-2017) show improved reliability. When maintained with correct oil (5W-40 ACEA C3) and regular services, it can achieve 150,000 km or more. Avoiding short trips and allowing turbo cool-down enhances longevity.
The most documented issues are turbo wastegate actuator binding, intake valve carbon buildup, coolant leaks from the thermostat housing, and ignition coil failures. These are supported by Alfa Romeo service bulletins and field reports. Carbon cleaning and actuator updates significantly improve long-term operation.
This 1.75L turbo petrol engine was used in the Giulietta (940), MiTo (380), and early Giulia (952) models between 2015 and 2020. It powered variants from 165 PS to 240 PS, primarily in front-wheel-drive configurations. The engine was phased out in favor of the newer FireFly family in later model years.
Yes, the AR 01911 responds well to ECU remapping. Stage 1 tunes typically add +30–50 kW, leveraging the robust stock internals. Intercooler and intake upgrades support higher power levels. Tuning should be performed by specialists familiar with Alfa Romeo systems to avoid triggering limp mode or damaging sensors.
In real-world driving, expect 8.0–9.5 L/100km (29–35 mpg UK) in mixed conditions. Highway driving can achieve ~6.8 L/100km (~42 mpg UK). Performance-oriented driving reduces efficiency significantly. Fuel quality (minimum 95 RON) affects combustion stability and long-term engine health.
Yes, the AR 01911 – Petrol 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 life, any abnormal noise from the front cover should be investigated immediately to prevent catastrophic failure.
Alfa Romeo specifies SAE 5W-40 synthetic oil meeting ACEA C3 standards. This low-ash formulation protects the turbocharger and prevents deposit formation. Oil changes should occur every 15,000 km or annually. Using incorrect oil can accelerate turbo and timing chain wear, especially under high-load conditions.
Comprehensive technical documentation and regulatory references
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EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
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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)
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Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
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