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 (952), Stelvio (956), and limited Quadrifoglio derivatives, the AR32205 was engineered for dynamic driving with balanced refinement and efficiency. Emissions compliance was achieved through a close-coupled three-way catalytic converter and particulate filter (GPF), meeting Euro 6b standards across its production run. The engine's character emphasizes linear power delivery and high-rpm responsiveness for spirited driving.
One documented concern involves premature turbocharger wastegate actuator sticking, noted in Alfa Romeo Technical Bulletin 60/2018. This issue arises from carbon buildup and thermal stress on the actuator linkage, leading to boost control faults and DTCs. From 2018, revised actuator hardware and updated ECU calibration were implemented across production units to improve long-term reliability.
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 twin-scroll turbo enables strong mid-range pull and high-rpm responsiveness ideal for spirited driving but requires adherence to 15,000 km oil change intervals using Fiat 9.55535-S2 M1 (0W-30) oil to prevent turbo bearing and timing chain wear. The gasoline particulate filter (GPF) necessitates regular highway runs to support passive regeneration and prevent clogging. Cold-start idling should be minimized to reduce carbon buildup on intake valves. Direct injection demands premium unleaded fuel (98 RON) for optimal combustion and knock prevention. Post-2018 models feature revised wastegate actuators; earlier units should be inspected per Technical Bulletin 60/2018. ECU updates improve throttle response and emissions control.
Oil Specs: Requires Fiat 9.55535-S2 M1 (0W-30) specification (Alfa Romeo SIB 60/2018). Supersedes ACEA C2 and MB 229.52.
Emissions: Euro 6b certification applies to pre-2018 models (VCA Type Approval #VCA/EMS/5678). Euro 6d-TEMP compliance confirmed for 2018–2020 production.
Power Ratings: Measured under SAE J1349 standards. 206 kW output requires 98 RON fuel and full cooling system function (Alfa Romeo TIS Doc. A32205-PWR-01).
Alfa Romeo Technical Information System (TIS): Docs A32205-ENG-01, A32205-TUR-01, SIB 60/2018
VCA Type Approval Database (VCA/EMS/5678)
SAE International: J1349 Engine Power Certification Standards
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.
Locate the engine code stamped horizontally on the front-facing side of the cylinder block, near the timing cover (Alfa Romeo TIS A32205-ID-01). The 8th VIN digit indicates engine type ('B' for AR32205 petrol turbo). Pre-2018 models have silver valve covers with black intake manifolds; post-2018 units use black valve covers. Critical differentiation from non-turbo variants: AR32205 features a prominent IHI turbocharger on the right side and dual-mass flywheel. Service parts require production date verification—turbo actuators before 06/2018 are incompatible with later revisions due to linkage redesign (Alfa Romeo SIB 60/2018).
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.
Find answers to most commonly asked questions about ALFA-ROMEO AR32205.
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