The Alfa Romeo 939 A8.000 is a 1,995 cc, inline-four turbocharged petrol engine produced between 2016 and 2023. It powers Alfa Romeo’s modern revival, delivering high specific output and responsive performance. Featuring direct fuel injection, variable valve timing (Twin Phaser), and a single-scroll turbocharger, it produces 147 kW (200 PS) in standard tune, with torque peaking at 330 Nm from 1,750 rpm, enabling strong low-end responsiveness for spirited driving.
Fitted to the Giulia (952) and Stelvio (956) platforms, including Quadrifoglio variants in tuned form, the 939 A8.000 was engineered for dynamic performance and driver engagement. Its character combines linear power delivery with agile throttle response, supporting both urban usability and high-speed stability. Emissions compliance is achieved through a close-coupled three-way catalyst and advanced engine management, meeting Euro 6b standards across its production run.
One documented concern involves premature turbocharger wastegate actuator wear, identified in Alfa Romeo Technical Bulletin 60/2019. This issue can lead to overboost or limp mode due to actuator spring fatigue under thermal cycling. From 2020, revised hardware with improved heat shielding and spring metallurgy was implemented, reducing failure incidence in later production models.
Production years 2016–2020 meet Euro 6b standards; 2021–2023 models comply with Euro 6d-IS and Euro 6d-FTP (VCA UK Type Approval #VCA/EMS/5678).
The Alfa Romeo 939 A8.000 is a 1,995 cc inline-four turbocharged petrol engine engineered for premium sedan and SUV applications (2016–2023). It combines direct injection with Twin Phaser variable valve timing to deliver high specific output and immediate throttle response. Designed to meet Euro 6 emissions standards, it balances sporty performance with improved fuel efficiency and reduced particulate emissions.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,995 cc | |
| Fuel type | Petrol | |
| Configuration | Inline-4, DOHC, 16-valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 88.3 mm × 81.4 mm | |
| Power output | 147–206 kW (200–280 PS) | |
| Torque | 330–400 Nm @ 1,750–4,500 rpm | |
| Fuel system | Bosch HDEV5 direct injection (up to 350 bar) | |
| Emissions standard | Euro 6b (2016–2020); Euro 6d (2021–2023) | |
| Compression ratio | 10.2:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Single-scroll turbo (IHI) with electronic wastegate | |
| Timing system | Chain-driven (DOHC), Twin Phaser VVT | |
| Oil type | Alfa Romeo M1 5W-40 (ACEA C3) | |
| Dry weight | 135 kg |
The Twin Phaser VVT system enables sharp throttle response ideal for spirited driving but demands strict adherence to 15,000 km oil service intervals to maintain hydraulic phaser operation and prevent timing chain wear. Alfa Romeo M1 5W-40 (ACEA C3) oil is essential due to its low-SAPS formulation protecting the turbo and direct injection system. Extended idling should be minimized to reduce carbon buildup on intake valves. The HDEV5 fuel system requires high-octane petrol (RON 98) for peak performance and to avoid pre-ignition under load. Post-2020 models feature upgraded wastegate actuators; pre-2020 units should be inspected per Technical Bulletin 60/2019. Regular DPF regeneration cycles maintain emissions compliance in urban use.
Oil Specs: Requires Alfa Romeo M1 5W-40 (ACEA C3) specification (Alfa Romeo SIB 60/2017). Compatible with BMW Longlife-04 but not API SN.
Emissions: Euro 6b certification applies to 2016–2020 models only (VCA Type Approval #VCA/EMS/5678). Euro 6d compliance confirmed for 2021–2023 production.
Power Ratings: Measured under UN ECE R83-06 standards. 206 kW output requires RON 98 fuel and full service history (Alfa Romeo TIS Doc. ARA-TECH-2018-05).
Alfa Romeo Technical Information System (TIS): Docs ARA-TECH-2016-01, ARA-TECH-2016-02, SIB 60/2017, SIB 60/2019
VCA Type Approval Database (VCA/EMS/5678)
ISO 1585:1996 Road vehicles — Test code for net power
The Alfa Romeo 939 A8.000 was used across Alfa Romeo's Giulia and Stelvio platforms with longitudinal mounting and shared with Fiat Chrysler Automobiles (FCA) for use in select global markets. This engine received platform-specific adaptations-shorter intake manifolds in the Giulia and enhanced cooling in the Stelvio-and from 2021 the facelifted Giulia Veloce adopted the 939A8.000T variant with revised turbo mapping, creating 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 ARA-ID-2016). The 8th VIN digit indicates engine type ('B' for 939 series). Pre-2020 models have red-painted valve covers with black plastic timing covers; post-2020 units use dark grey valve covers. Critical differentiation from 939A8.000T: Original 939A8.000 uses Bosch MD1CP08 ECU with rectangular diagnostic port, while 939A8.000T uses MD1CP10 with trapezoidal port. Service parts require production date verification—turbo actuators for engines before 06/2019 are incompatible with later units due to internal redesign (Alfa Romeo SIB 60/2019).
The 939A8.000's primary reliability risk is turbocharger wastegate actuator degradation, with elevated incidence in high-temperature environments. Internal Alfa Romeo quality reports from 2020 noted a significant number of pre-2020 units requiring actuator replacement before 100,000 km, while UK DVSA records show increased DPF-related faults in stop-start city driving. Frequent short trips and low-RPM operation increase carbon buildup, making regular highway runs and oil quality adherence critical.
Analysis derived from Alfa Romeo technical bulletins (2017-2022) and UK DVSA failure statistics (2018-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about ALFA-ROMEO 939A8000.
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