The Alfa Romeo AR 32401 is a 1,995 cc, inline — four turbocharged petrol engine produced between 2020 and 2023. It powers select Giulia and Stelvio variants with enhanced thermal efficiency and reduced emissions over its predecessor. Featuring high — pressure direct injection (up to 350 bar), Twin Phaser variable valve timing, and a compact single — scroll turbocharger, it delivers 169 kW (230 PS) and 330 Nm of torque from 1,900 rpm, enabling responsive mid — range performa…
All production models (2020–2023) comply with Euro 6d-ISC and Euro 6d-FTP standards (VCA UK Type Approval #VCA/EMS/5679).
The Alfa Romeo AR 32401 is a 1,995 cc inline-four turbocharged petrol engine engineered for premium sedan and SUV applications (2020–2023). It combines high-pressure direct injection with Twin Phaser variable valve timing to deliver refined performance and improved fuel efficiency. Designed to meet Euro 6d emissions standards, it balances responsive driving dynamics with reduced particulate and NOx 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 | 169 kW (230 PS) | |
Torque | 330 Nm @ 1,900–4,500 rpm | |
Fuel system | Bosch HDEV5 direct injection (up to 350 bar) | |
Emissions standard | Euro 6d-ISC and Euro 6d-FTP | |
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 | 136 kg |
The Alfa Romeo AR 32401 was used across Alfa Romeo's Giulia and Stelvio platforms with longitudinal mounting and shared with Fiat Chrysler Automobiles (FCA) for select European applications. This engine received platform-specific adaptations-enhanced cooling in the Stelvio and revised intake tuning in the Giulia-and from 2021 the facelifted Stelvio Veloce adopted the AR32401T variant with updated ECU mapping, creating interchange limits. All adaptations are documented in OEM technical bulletins.
The AR32401's primary reliability risk is elevated oil consumption in early production units, with increased incidence in high-temperature environments. Internal Alfa Romeo quality reports from 2021 noted a significant number of pre-mid-2020 units requiring piston ring service before 80,000 km, while UK DVSA records show increased EGR-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 (2020-2022) and UK DVSA failure statistics (2020-2023). Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
The AR 32401 delivers refined performance and improved efficiency over its predecessor. However, early 2020 models had elevated oil consumption due to piston ring design. Post-mid-2020 revisions resolved this issue, so well-maintained examples with updated pistons can exceed 150,000 km. Regular servicing and using high-quality oil (5W-40 Alfa Romeo M1) are essential for longevity.
The most documented issues are excessive oil consumption (pre-mid-2020), intake valve carbon buildup, EGR valve clogging, and valve cover oil leaks. These are supported by Alfa Romeo service bulletins and dealer repair logs. ECU software updates have addressed some drivability concerns in later models.
This 2.0L turbo petrol engine is used in the Giulia Veloce (2020–2023) and Stelvio Veloce (2020–2023). It also appears in European-market Jeep Compass (MP) models from 2021–2023. All variants meet Euro 6d emissions standards, with full compliance verified under both ISC and FTP test cycles.
Yes. The engine responds well to ECU remapping, with stage 1 tunes typically adding +30–40 kW. Stock internals handle increased boost safely up to 260 PS. Supporting modifications like intercooler upgrades and exhaust systems improve thermal management. Tuning should use reputable firms with Alfa-specific calibration experience.
In the Giulia 2.0 Veloce, combined consumption is ~7.8 L/100km (36.2 mpg UK), with city driving around 9.2 L/100km and highway as low as 6.5 L/100km. Real-world figures vary by driving style, but expect 30–36 mpg UK. High-octane fuel (RON 98) is recommended for optimal performance and knock prevention.
Yes. The AR 32401 series is an interference engine. If the timing chain fails or jumps, pistons can collide with open valves, resulting in severe internal damage. Chain maintenance is critical—any cold-start rattles should be investigated immediately to avoid costly repairs.
Alfa Romeo specifies M1 5W-40 synthetic oil meeting ACEA C3 standards. Use only low-SAPS oils designed for turbocharged direct-injection engines and change every 15,000 km or 12 months. Proper oil ensures longevity of the turbo, phasers, and timing system.
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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