The Alfa Romeo AR32501 is a 1,995 cc, inline — four turbocharged petrol engine produced between 2020 and 2025. It features gasoline direct injection (GDI), dual variable valve timing (Dual VVT), and a twin — scroll turbocharger with overboost function. In standard tune it delivers 195 kW (265 PS), with peak torque of 400 Nm available from 3,000–4,000 rpm, enabling strong mid — range performance and high — speed responsiveness across Giulia and Stelvio applications.
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Production years 2020–2022 meet Euro 6d-TEMP; 2023–2025 models comply with Euro 6e .
The Alfa Romeo AR32501 is a 1,995 cc inline-four turbocharged petrol engine engineered for premium sedans and SUVs (2020–2025). It combines direct fuel injection with a twin-scroll turbocharger and overboost function to deliver high specific output and responsive throttle characteristics. Designed to meet Euro 6d-TEMP and Euro 6e emissions standards, it balances performance with modern environmental requirements.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,995 cc | |
Fuel type | Petrol | |
Configuration | Inline-4, DOHC, 16-valve | |
Aspiration | Turbocharged (twin-scroll, overboost capable) | |
Bore × stroke | 88.3 mm × 81.4 mm | |
Power output | 195 kW (265 PS) | |
Torque | 400 Nm @ 3,000–4,000 rpm (450 Nm overboost) | |
Fuel system | Bosch HDEV6 direct injection (up to 350 bar) | |
Emissions standard | Euro 6d-TEMP (2020–2022); Euro 6e (2023–2025) | |
Compression ratio | 9.8:1 | |
Cooling system | Water-cooled, dual-circuit with electric thermostat | |
Turbocharger | IHI twin-scroll turbo with electronic wastegate and overboost | |
Timing system | Chain-driven (single-row, front-mounted) | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 136 kg |
The Alfa Romeo AR32501 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 Ti variants—and from 2022 the facelifted Giulia and Stelvio models adopted updated piston rings and ECU calibrations, creating interchange limits. All adaptations are documented in OEM technical bulletins.
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The AR32501 delivers strong performance and responsiveness, but early models (2020-2021) had reliability concerns, particularly intake valve carbon buildup. Later revisions (post-2022) improved piston ring design and reduced oil consumption, 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-S3 M2 oil greatly enhance longevity.
The most documented issues are intake valve carbon buildup, gasoline particulate filter (GPF) clogging, and turbo overboost control faults. 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 2.0L turbo petrol engine powers the Giulia (2.0 Turbo 265 PS Ti/Veloce) and Stelvio (2.0 Turbo 265 PS Ti/Veloce). It was introduced in 2020 and remains in production through 2025. All models meet Euro 6d-TEMP (2020–2022) or Euro 6e (2023–2025) emissions standards across the production run.
Aftermarket ECU tuning is common on the AR32501 platform, but increasing boost or altering engine parameters accelerates component wear, impacts emissions compliance, and may void vehicle warranties. Any modifications should be evaluated carefully by a qualified specialist.
Moderate. In a Giulia 2.0 Turbo (265 PS), combined consumption is ~8.3 L/100km (34 mpg UK). The Stelvio, being heavier, averages ~9.0 L/100km (31 mpg UK). Real-world figures vary significantly with driving style—aggressive use drops efficiency to 11+ L/100km, while mixed driving yields 28-34 mpg UK.
Yes. The AR32501 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-20 synthetic oil meeting Fiat 9.55535-S3 M2 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.
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