The Alfa Romeo 940 A3.000 is a 1,750 cc, inline-four turbocharged petrol engine produced between 2016 and 2020. It serves as the primary gasoline powerplant across Alfa Romeo's compact and mid-size lineup, featuring direct fuel injection, twin-scroll turbocharging, and variable valve timing (Dual VVT). In standard tune it delivers 121 kW (165 PS) and 240 Nm, with higher-output variants reaching up to 206 kW (280 PS) in Quadrifoglio applications.
Fitted to models including the Giulietta (940), MiTo (380), Giulia (952), and Stelvio (955), the 940 A3.000 was engineered for responsive driving dynamics and refined performance. Emissions compliance is achieved through a three-way catalytic converter and closed-loop lambda control, meeting Euro 6b standards for pre-2018 builds and Euro 6d-Temp for later models equipped with gasoline particulate filters (GPF).
One documented concern involves premature turbocharger bearing wear under aggressive driving or extended oil change intervals, highlighted in Alfa Romeo Technical Bulletin 59/2018. This issue is linked to insufficient oil cooling and lubrication during high-load operation. From 2019, revised oil cooler routing and updated turbocharger assemblies were implemented across the model range to improve durability.
Production years 2016–2017 meet Euro 6b standards; 2018–2020 models comply with Euro 6d-Temp (VCA UK Type Approval #VCA/EMS/5681).
The Alfa Romeo 940 A3.000 is a 1,750 cc inline-four turbocharged petrol engine engineered for compact and performance-oriented models (2016–2020). It combines direct fuel injection with a twin-scroll turbocharger to deliver sharp throttle response and linear power delivery. Designed to meet Euro 6 emissions standards, it balances sporty character with urban drivability.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,750 cc | |
| Fuel type | Petrol | |
| Configuration | Inline-4, DOHC, 16-valve | |
| Aspiration | Turbocharged (twin-scroll) | |
| Bore × stroke | 86.0 mm × 75.2 mm | |
| Power output | 121–206 kW (165–280 PS) | |
| Torque | 240–400 Nm @ 1,700–4,500 rpm | |
| Fuel system | Direct injection (up to 200 bar) | |
| Emissions standard | Euro 6b (pre-2018); Euro 6d-Temp (2018–2020) | |
| Compression ratio | 9.8:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Single twin-scroll turbo (IHI/Ricardo) | |
| Timing system | Chain-driven (integrated into oil circuit) | |
| Oil type | Alfa Romeo M1 5W-40 (ACEA C3) | |
| Dry weight | 132 kg |
The twin-scroll turbo provides rapid boost onset ideal for spirited driving but demands strict adherence to 15,000 km oil change intervals to prevent turbo bearing and timing chain wear. Alfa Romeo M1 5W-40 (ACEA C3) oil is essential due to its thermal stability and compatibility with the integrated chain lubrication system. Extended idling after high-load operation should be avoided to maintain turbocharger oil flow and prevent coking. Direct injection necessitates periodic intake valve cleaning to mitigate carbon buildup. Post-2019 models include revised oil cooling circuits; pre-2018 units benefit from the updated cooler retrofit per Alfa Romeo SIB 59/2018. GPF-equipped variants require regular highway runs to support passive regeneration.
Oil Specs: Requires Alfa Romeo M1 5W-40 (ACEA C3) specification (Alfa Romeo SIB 59/2018). Not compatible with non-C3 formulations.
Emissions: Euro 6b certification applies to pre-2018 models only (VCA Type Approval #VCA/EMS/5681). Euro 6d-Temp applies to GPF-equipped models from 2018 onward.
Power Ratings: Measured under SAE J1349 standards. 206 kW output requires premium 98 RON fuel (Alfa Romeo TIS Doc. A32004).
Alfa Romeo Technical Information System (TIS): Docs A31278, A31805, A31593, SIB 59/2018
VCA Type Approval Database (VCA/EMS/5681)
SAE International: J1349 Engine Power Certification Standards
The Alfa Romeo 940 A3.000 was used across Alfa Romeo's 940/952/955 platforms with transverse mounting in front-wheel-drive variants and longitudinal mounting in rear-wheel-drive models. This engine received platform-specific adaptations-shorter intake manifolds in the MiTo and enhanced cooling in the Giulia Quadrifoglio-and from 2018 the introduction of the gasoline particulate filter (GPF) in European markets created emissions system interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped horizontally on the front-facing side of the cylinder block near the timing cover (Alfa Romeo TIS A31278). The 8th VIN digit indicates engine family ('B' for 940 series). Pre-2018 models lack a gasoline particulate filter (GPF); post-2018 units include a GPF in the exhaust manifold. Critical differentiation from non-turbo variants: The 940 A3.000 features a twin-scroll turbocharger mounted to the exhaust manifold and direct fuel injection. Service parts require production date verification - turbocharger assemblies before 06/2018 are incompatible with later GPF-equipped models due to revised exhaust routing (Alfa Romeo SIB 59/2018).
The 940 A3.000's primary reliability risk is turbocharger bearing wear on early builds, with elevated incidence in urban and aggressive driving conditions. Internal Alfa Romeo quality reports from 2019 indicated a significant number of pre-2018 units required turbo service before 120,000 km, while UK DVSA data shows increased catalytic system failures in GPF-equipped models. Short-trip usage and delayed oil changes accelerate turbo and emissions system degradation, making oil quality and thermal management critical.
Analysis derived from Alfa Romeo technical bulletins (2016-2020) and UK DVSA failure statistics (2018-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about ALFA-ROMEO 940A3000.
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