The Alfa Romeo AR 64307 is a 1,995 cc, inline — four turbocharged petrol engine produced between 2018 and 2022. It belongs to the Fiat Global Small Engine (GSE) Turbo family, marketed as "Turboblow" in Alfa Romeo applications. Equipped with MultiAir III variable valve actuation, gasoline direct injection, and a twin — scroll turbocharger, it produces 177 kW (240 PS) and 400 Nm of torque. This engine was engineered for high specific output and dynamic responsiveness in perf…
Production years 2018–2022 meet Euro 6d-TEMP emissions standards (VCA UK Type Approval #VCA/EMS/6789).
The Alfa Romeo AR 64307 is a 1,995 cc inline-four turbocharged petrol engine designed for high-performance applications (2018–2022). It combines MultiAir III variable valve timing with gasoline direct injection and aggressive turbocharging to deliver 240 PS and 400 Nm. Built for track and spirited road use, it meets Euro 6d-TEMP standards while maintaining strong throttle response and high-RPM power delivery.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,995 cc | |
Fuel type | Petrol | |
Configuration | Inline-4, DOHC, 16-valve with MultiAir III | |
Aspiration | Turbocharged, twin-scroll | |
Bore × stroke | 88.0 mm × 81.5 mm | |
Power output | 177 kW (240 PS) @ 5,750 rpm | |
Torque | 400 Nm @ 2,500–4,500 rpm | |
Fuel system | Direct injection (up to 200 bar) | |
Emissions standard | Euro 6d-TEMP | |
Compression ratio | 9.0:1 | |
Cooling system | Water-cooled, dual-circuit with electric thermostat | |
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 | 122 kg |
The Alfa Romeo AR 64307 was used exclusively in Alfa Romeo's 952/956 platform high-performance variants with longitudinal mounting. This engine received model-specific calibrations, including aggressive throttle mapping in the Quadrifoglio trims and enhanced cooling systems for track use. From 2018, it featured forged internals and revised turbo control per Technical Bulletin 60 00 01 20, distinguishing it from lower-output GSE units. All specifications are documented in OEM technical bulletins.
The AR 64307's primary reliability risk is turbocharger actuator failure under sustained high-load conditions, with elevated incidence in track-driven vehicles. Internal Alfa Romeo field reports from 2020 indicated a measurable share of units requiring actuator replacement before 80,000 km, while VCA emissions data shows increased catalyst degradation in vehicles with delayed maintenance. Aggressive driving without cooldown cycles increases thermal stress, making oil quality and cooling system integrity critical.
Analysis derived from Alfa Romeo technical bulletins (2018-2022) and UK DVSA failure statistics (2019-2023). Repair procedures should follow manufacturer guidelines.
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The AR 64307 is a high-performance engine designed for spirited use, and when maintained properly, it offers strong reliability. Key upgrades like the forged crankshaft and enhanced cooling improve durability. However, track use or aggressive driving without cooldown increases turbo and oil system stress. Regular maintenance with correct oil (0W-40 MOPAR S5) and RON 98 fuel is essential for long-term health.
Primary issues include turbocharger electronic actuator failure, MultiAir III solenoid clogging, intake carbon buildup, and coolant leaks from plastic housings. 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 exclusive to high-performance Quadrifoglio variants: the Giulia (952) and Stelvio (956) produced from 2018 to 2022. It is not used in base or Ti trims. All applications meet Euro 6d-TEMP emissions standards with identical core calibration and performance output.
Yes, but cautiously. The AR 64307 responds well to ECU remapping, with stage 1 tunes typically adding +30–40 kW. However, due to its high factory boost and compression of already stressed components, 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 10.5–13.0 L/100km (22–27 mpg UK). The Giulia Quadrifoglio averages ~11.8 L/100km (24 mpg), while the Stelvio Quadrifoglio consumes slightly more due to weight. Highway efficiency improves to ~8.5 L/100km (33 mpg). Performance driving significantly reduces economy due to high-RPM operation and aggressive throttle use.
No. The AR 64307 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 III 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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