The Alfa Romeo AR 64399 is a 1,995 cc, inline — four turbocharged petrol engine produced between 2020 and 2025. It belongs to the Fiat Global Small Engine (GSE) Turbo family, marketed as "Turboblow" in Alfa Romeo applications. Equipped with MultiAir IV variable valve actuation, gasoline direct injection, and a twin — scroll turbocharger, it produces 195 kW (265 PS) and 400 Nm of torque. This engine was engineered for high — performance dynamics and thermal resilience in mod…
Production years 2020–2025 meet Euro 6d-FULL emissions standards (VCA UK Type Approval #VCA/EMS/7890).
The Alfa Romeo AR 64399 is a 1,995 cc inline-four turbocharged petrol engine designed for premium performance applications (2020–2025). It combines MultiAir IV variable valve timing with high-pressure direct injection and aggressive turbocharging to deliver 265 PS and 400 Nm. Built for dynamic road use, it meets Euro 6d-FULL standards while maintaining sharp throttle response and smooth power delivery.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,995 cc | |
Fuel type | Petrol | |
Configuration | Inline-4, DOHC, 16-valve with MultiAir IV | |
Aspiration | Turbocharged, twin-scroll | |
Bore × stroke | 88.0 mm × 81.5 mm | |
Power output | 195 kW (265 PS) @ 5,750 rpm | |
Torque | 400 Nm @ 2,500–4,500 rpm | |
Fuel system | Direct injection (up to 350 bar) | |
Emissions standard | Euro 6d-FULL | |
Compression ratio | 9.8:1 | |
Cooling system | Water-cooled, electric thermostat with active thermal management | |
Turbocharger | IHI twin-scroll turbo with electronic wastegate | |
Timing system | Chain-driven (non-interference design) | |
Oil type | Fiat 9.55535-S3 MOPAR S5 0W-40 | |
Dry weight | 124 kg |
The Alfa Romeo AR 64399 was used in Alfa Romeo's 952/956 platform high-performance trims with longitudinal mounting. This engine received model-specific calibrations, including sport-tuned throttle mapping in the Veloce and Ti variants and enhanced thermal management for improved emissions control. From 2020, it featured MultiAir IV and 350 bar fuel pressure per Technical Bulletin 57 00 01 22, distinguishing it from earlier GSE units. All specifications are documented in OEM technical bulletins.
The AR 64399's primary reliability risk is high-pressure fuel pump degradation under sustained high-load conditions, with elevated incidence in vehicles with mixed driving cycles. Internal Alfa Romeo field reports from 2022 indicated a measurable share of units requiring fuel pump replacement before 90,000 km, while VCA emissions data shows increased particulate filter clogging in vehicles with delayed maintenance. Short-trip driving without full warm-up increases fuel system stress, making thermal management and fuel quality adherence critical.
Analysis derived from Alfa Romeo technical bulletins (2020-2025) and UK DVSA failure statistics (2021-2024). 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 64399 is a high-performance engine designed for spirited road use, and when maintained properly, it offers strong reliability. Key upgrades like the 350 bar fuel system and active thermal management improve emissions control and efficiency. However, mixed driving or short trips without full warm-up increases fuel system stress. Regular maintenance with correct oil (0W-40 MOPAR S5) and RON 98 fuel is essential for long-term health.
Primary issues include high-pressure fuel pump degradation, MultiAir IV solenoid clogging, intake carbon buildup, and coolant leaks from electric components. These are documented in Alfa Romeo service bulletins. Using correct oil, avoiding short trips, and following service intervals significantly reduce the risk of major failures.
This 2.0L turbo petrol engine is used in high-performance Veloce and Ti trims: the Giulia (952) and Stelvio (956) produced from 2020 to 2025. It is not used in base or Quadrifoglio models. All applications meet Euro 6d-FULL emissions standards with identical core calibration and performance output.
Yes, but cautiously. The AR 64399 responds well to ECU remapping, with stage 1 tunes typically adding +35–45 kW. However, due to its high factory boost and fuel system pressure, tuning should only be performed by specialists. Supporting modifications like intercooler upgrades and enhanced cooling are strongly recommended to maintain reliability.
In real-world mixed driving, expect 9.8–12.5 L/100km (23–29 mpg UK). The Giulia Veloce averages ~11.0 L/100km (26 mpg), while the Stelvio Ti consumes slightly more due to weight. Highway efficiency improves to ~7.8 L/100km (36 mpg). Performance driving significantly reduces economy due to aggressive throttle use and turbo boost.
No. The AR 64399 uses a non-interference valvetrain design. If the timing chain fails or skips, piston-to-valve contact will not occur, preventing catastrophic internal damage. However, any timing fault still requires immediate repair to avoid misfires and catalytic converter damage.
Alfa Romeo specifies MOPAR S5 0W-40 (Fiat 9.55535-S3) synthetic oil. This high-temperature, low-SAPS formulation is critical for MultiAir IV system longevity and turbocharger protection. Oil must be changed every 15,000 km or 12 months, whichever comes first, to prevent tappet clogging and oil degradation under high thermal load.
Comprehensive technical documentation and regulatory references
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Regulation (EC) No 715/2007
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