The Alfa Romeo AR 30550 is a 1,995 cc, inline — four turbocharged petrol engine produced between 2021 and 2023. It features gasoline direct injection (GDI), dual overhead camshafts (DOHC), and a twin — scroll turbocharger, delivering 169 kW (230 PS) at 5,700 rpm and 360 Nm of torque from 2,000–4,500 rpm. This engine was engineered as the mid — tier petrol unit for Alfa Romeo’s premium compact and mid — size platforms, balancing performance and efficiency.
Fitted to the 952 Giu…
All production years 2021–2023 meet Euro 6d-TEMP emissions standards .
The Alfa Romeo AR 30550 is a 1,995 cc inline-four turbocharged petrol engine designed for premium applications (2021–2023). It utilizes gasoline direct injection and a twin-scroll turbocharger to deliver strong mid-range torque and responsive throttle characteristics. Designed to meet Euro 6d-TEMP emissions standards, it balances performance with regulated efficiency.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,995 cc | |
Fuel type | Petrol | |
Configuration | Inline-4, DOHC, 16-valve | |
Aspiration | Turbocharged (twin-scroll) | |
Bore × stroke | 88.0 mm × 81.5 mm | |
Power output | 169 kW (230 PS) @ 5,700 rpm | |
Torque | 360 Nm @ 2,000–4,500 rpm | |
Fuel system | Bosch HDEV6 direct injection (up to 350 bar) | |
Emissions standard | Euro 6d-TEMP | |
Compression ratio | 9.5:1 | |
Cooling system | Water-cooled | |
Turbocharger | IHI twin-scroll turbo with electronically controlled wastegate | |
Timing system | Chain-driven (double-row primary, single-row secondary) | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 139 kg |
The Alfa Romeo AR 30550 was used across Alfa Romeo's 952/956 platforms with longitudinal rear-transverse mounting and shared architecture with Stellantis. This engine received platform-specific tuning—slightly revised cooling in the 956 Stelvio and enhanced throttle mapping in the 952 Giulia—and from 2022 the facelifted 952/956 models adopted revised high-pressure fuel pump drives, creating interchange limits. All adaptations are documented in OEM technical bulletins.
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Field reports and technical service bulletins highlight component wear patterns under high-load operation. Adherence to manufacturer service intervals and approved fluid specifications is critical for long-term reliability.
Analysis derived from manufacturer technical service bulletins and industry workshop records. Repair procedures should follow manufacturer guidelines.
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The AR 30550 offers balanced performance and efficiency, but early models (2021-2021) had reliability concerns, particularly high-pressure fuel pump drive failures. Later revisions (post-2022) improved durability, so well-maintained examples can be robust. Regular servicing and using correct oil (0W-30 Fiat 9.55535-S2) are essential for longevity.
The most documented issues are high-pressure fuel pump drive wear, turbo wastegate actuator sticking, and intake valve carbon buildup. Coolant leaks from the thermostat housing are also frequent. These are confirmed in Alfa Romeo service bulletins and field reports.
This 2.0L mid-output turbo petrol engine was used in the Giulia (952) and Stelvio (956). It powered 2.0 Turbo 230 HP variants from 2021 to 2023. All models require Euro 6-compliant fuel and specific maintenance protocols.
Aftermarket ECU tuning is common on the AR30550 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.
In a Giulia 2.0 Turbo 230 HP, combined consumption is approximately 7.8 L/100 km (~36 mpg UK). Real-world figures vary: aggressive driving may see 11–13 L/100 km, while highway runs can achieve 6.8 L/100 km (~41 mpg UK). Driving style significantly impacts efficiency due to performance tuning.
Yes. The AR 30550 is an interference engine. If the timing chain fails or jumps, piston-to-valve contact is likely, resulting in severe internal damage. Adhering to maintenance schedules and addressing timing rattles immediately is critical.
Alfa Romeo specifies a 0W-30 synthetic oil meeting Fiat 9.55535-S2 specification. This oil ensures proper turbo and valve train lubrication. Change intervals should not exceed 15,000 km or one year, whichever comes first, to maintain engine health.
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Regulation (EC) No 715/2007
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