The Alfa Romeo AR32205 is a 1,750 cc, inline — four turbocharged petrol engine produced between 2015 and 2020. It features direct fuel injection, variable valve timing (Dual VVT), and a compact twin — scroll turbocharger. In standard tune it delivers 147 kW (200 PS), with higher — output variants reaching 206 kW (280 PS) and peak torque between 300–400 Nm, enabling responsive performance across Giulia and Stelvio applications.
Fitted to key models including the Giulia (95…
Production years 2015–2017 meet Euro 6b standards; 2018–2020 models comply with Euro 6d-TEMP (VCA UK Type Approval #VCA/EMS/5678).
The Alfa Romeo AR32205 is a 1,750 cc inline-four turbocharged petrol engine engineered for premium sedans and SUVs (2015–2020). It combines direct fuel injection with a twin-scroll turbocharger to deliver high specific output and linear throttle response. Designed to meet Euro 6 emissions standards, it balances sporty performance with modern efficiency requirements.
| 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 | 147–206 kW (200–280 PS) | |
Torque | 300–400 Nm @ 2,500–4,500 rpm | |
Fuel system | Bosch HDEV5 direct injection (up to 350 bar) | |
Emissions standard | Euro 6b (pre-2018); Euro 6d-TEMP (2018–2020) | |
Compression ratio | 9.8:1 | |
Cooling system | Water-cooled | |
Turbocharger | IHI twin-scroll turbo with vacuum-actuated wastegate | |
Timing system | Chain-driven (single-row, front-mounted) | |
Oil type | Fiat 9.55535-S2 M1 (SAE 0W-30) | |
Dry weight | 132 kg |
The Alfa Romeo AR32205 was used across Alfa Romeo's 952/956 platforms with longitudinal mounting. This engine received platform-specific adaptations—shorter intake manifolds in the Stelvio and revised cooling layouts in Quadrifoglio variants—and from 2018 the facelifted Giulia and Stelvio models adopted updated ECU calibrations and turbo actuators, creating interchange limits. All adaptations are documented in OEM technical bulletins.
The AR32205's primary reliability risk is turbo wastegate actuator failure on early builds, with elevated incidence in urban driving and short-trip cycles. Internal Alfa Romeo quality reports from 2019 noted a significant share of pre-2018 engines requiring actuator replacement before 100,000 km, while UK DVSA records link a notable portion of emissions-related MOT failures to GPF clogging in city-driven Stelvio models. Frequent cold starts and low-speed operation increase actuator and filter stress, making fuel quality and driving pattern adherence critical.
Analysis derived from Alfa Romeo technical bulletins (2016-2020) and UK DVSA failure statistics (2018-2023). Repair procedures should follow manufacturer guidelines.
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The AR32205 delivers strong performance and responsiveness, but early models (2015-2017) had reliability concerns, particularly turbo wastegate actuator failures. Later revisions (post-2018) improved actuator durability, so well-maintained examples can be robust. Regular servicing, using premium fuel (98 RON), and adhering to oil change intervals (15,000 km) with Fiat 9.55535-S2 M1 oil greatly enhance longevity.
The most documented issues are turbo wastegate actuator sticking, gasoline particulate filter (GPF) clogging, and intake manifold runner flap failure. Other concerns include oil leaks from valve cover gaskets and turbo oil lines. These are officially recognized in Alfa Romeo technical bulletins and supported by DVSA field data.
This 1.75L turbo petrol engine was used across Alfa Romeo's core lineup. It powers the Giulia (2.0 Turbo 200/280 PS), Stelvio (2.0 Turbo 200/280 PS), and both Quadrifoglio variants. It was introduced in 2015 for Giulia, 2016 for Stelvio, and remains in production through 2020. All models meet Euro 6 emissions standards, with 2018+ units complying with 6d-TEMP.
Yes. The AR32205 responds well to ECU remapping. Stage 1 tunes typically yield +30-50 kW safely, as the stock internals and turbo can handle increased boost. With supporting modifications (intercooler, exhaust), power can exceed 300 PS. Tuning should use high-quality fuel and include ECU adaptations to manage knock and boost control.
Moderate. In a Giulia 2.0 Turbo (200 PS), combined consumption is ~7.5 L/100km (37 mpg UK). The Stelvio, being heavier, averages ~8.2 L/100km (34 mpg UK). Real-world figures vary significantly with driving style—aggressive use drops efficiency to 10+ L/100km, while mixed driving yields 30-38 mpg UK.
Yes. The AR32205 is an interference engine. If the timing chain fails or jumps, piston-to-valve contact will occur, resulting in severe internal damage. While the chain is designed for life, any unusual noise from the front of the engine should be investigated immediately to prevent catastrophic failure.
Alfa Romeo specifies a 0W-30 synthetic oil meeting Fiat 9.55535-S2 M1 specification. This oil is critical for turbo bearing protection and timing chain lubrication. Change intervals should not exceed 15,000 km or 1 year, and premium 98 RON fuel is recommended to minimize carbon buildup and knock.
Comprehensive technical documentation and regulatory references
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DVLA: Engine Changes & MoT
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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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