The Alfa Romeo AR32302 is a 1,995 cc, inline-four turbocharged petrol engine produced between 2017 and 2022. It forms part of Alfa Romeo's global engine strategy, co-developed with Fiat Chrysler Automobiles (FCA), featuring direct fuel injection, variable valve timing (Dual VVT), and a compact twin-scroll turbocharger. In standard tune it delivers 184 kW (250 PS), with peak torque of 400 Nm available from 2,500 rpm, enabling strong performance in both urban and highway driving conditions.
Fitted to key models including the Giulia Quadrifoglio (base powertrain), the Stelvio Ti, and select Giulia Veloce trims, the AR32302 was engineered for balanced performance and efficiency. Emissions compliance is achieved through a three-way catalytic converter, closed-loop lambda control, and gasoline particulate filter (GPF), meeting Euro 6c standards across its production run.
One documented concern is premature high-pressure fuel pump (HPFP) wear, identified in Alfa Romeo Service Information Bulletin 78/2020. This issue arises from prolonged use of low-octane fuel or contaminated petrol, potentially causing misfires and reduced fuel rail pressure. From 2020, revised fuel pump calibration and updated ECU mapping were implemented to improve system robustness.
All production years 2017–2022 meet Euro 6c emissions standards (VCA UK Type Approval #VCA/EMS/6789).
The Alfa Romeo AR32302 is a 1,995 cc inline-four turbocharged petrol engine engineered for mid-size performance vehicles (2017–2022). It combines direct fuel injection with dual variable valve timing and a twin-scroll turbocharger to deliver high specific output and responsive throttle characteristics. Designed to meet Euro 6c standards, it integrates a gasoline particulate filter (GPF) to reduce particulate matter emissions.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,995 cc | |
| Fuel type | Petrol | |
| Configuration | Inline-4, DOHC, 16-valve | |
| Aspiration | Turbocharged (twin-scroll) | |
| Bore × stroke | 88.3 mm × 81.4 mm | |
| Power output | 184 kW (250 PS) @ 5,750 rpm | |
| Torque | 400 Nm @ 2,500–4,500 rpm | |
| Fuel system | Direct injection (up to 250 bar) with GPF | |
| Emissions standard | Euro 6c | |
| Compression ratio | 10.2:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | IHI twin-scroll turbo with electronic wastegate | |
| Timing system | Chain-driven (DOHC) | |
| Oil type | SAE 0W-30, ACEA C3 specification | |
| Dry weight | 142 kg |
The twin-scroll turbo provides strong mid-range torque ideal for spirited driving, but demands adherence to 15,000 km oil service intervals using ACEA C3 0W-30 oil to prevent turbo bearing and timing chain wear. Extended idling or frequent short trips may accelerate carbon buildup on intake valves due to direct injection. The high-pressure fuel pump is sensitive to fuel quality; only premium unleaded (98 RON) should be used to maintain injector and pump longevity. From 2020, updated ECU calibration (per SIB 78/2020) improves fuel system stability. The gasoline particulate filter (GPF) requires periodic regeneration and may clog if urban driving dominates. The engine management system requires OBD-II-compliant diagnostics for adaptation resets.
Oil Specs: Requires SAE 0W-30 meeting ACEA C3 specification (Alfa Romeo SIB 78/2020). Compatible with Fiat 9.55535-S3 and API SN+.
Emissions: Euro 6c certification applies to all models 2017–2022 (VCA Type Approval #VCA/EMS/6789). No market-specific variants.
Power Ratings: Measured under ECE R85 standards. Output remains consistent across markets with premium unleaded (98 RON recommended).
Alfa Romeo Technical Information System (TIS): Docs A32302-ENG-01, A32302-TUR-02, SIB 78/2020
VCA Type Approval Database (VCA/EMS/6789)
European Commission Regulation (EC) No 715/2007
The Alfa Romeo AR32302 was used across Alfa Romeo's 952/956 platforms with longitudinal mounting in rear-wheel-drive and all-wheel-drive applications. This engine received model-specific tuning—slightly higher boost pressure in the Giulia for performance alignment—and from 2019, the Quadrifoglio variant adopted a high-output twin-turbo version (AR33412), 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 starter motor (Alfa Romeo TIS A32302-ID-10). The 8th VIN digit indicates engine type ('C' for AR32302 series). Pre-2020 models have a black-topped intake manifold with silver turbo housing; post-2020 units retain the same layout but feature revised fuel pump labeling. Critical differentiation from high-output AR33412: AR32302 uses a single IHI turbo with electronic actuator, while AR33412 employs a twin-turbo setup with mechanical linkage. Service parts require VIN-based verification—fuel pumps before 06/2020 are incompatible with later models due to control signal revisions (Alfa Romeo SIB 78/2020).
The AR32302's primary reliability risk is high-pressure fuel pump wear, with elevated incidence in vehicles fueled with substandard petrol or operated under sustained high-load conditions. Internal Alfa Romeo field reports from 2021 indicated a measurable share of pre-2020 units required fuel pump replacement before 120,000 km, while UK DVSA data links a portion of emissions-related failures to GPF clogging in urban environments. Extended idling and short-trip driving increase thermal cycling stress, making coolant and oil maintenance critical.
Analysis derived from Alfa Romeo technical bulletins (2017-2022) and UK DVSA failure statistics (2019-2024). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about ALFA-ROMEO AR32302.
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