The Alfa Romeo AR 10527 is a 1,995 cc, inline-four turbocharged petrol engine produced between 2020 and 2023. It belongs to the FireFly GSE (Global Small Engine) family developed under Stellantis, featuring MultiAir IV variable valve timing, direct fuel injection, and a twin-scroll turbocharger. In standard tune it delivers 140 kW (190 PS), with peak torque of 300 Nm available from 2,500 rpm.
Fitted to models such as the 952 Giulia and 953 Stelvio, the AR 10527 was engineered for responsive driving dynamics and modern emissions compliance. Emissions control is achieved through a close-coupled three-way catalytic converter, gasoline particulate filter (GPF), and dual lambda sensors, meeting Euro 6d-Full standards across all production years in European markets.
One documented concern is premature wear of the high-pressure fuel pump drive mechanism, highlighted in Alfa Romeo Technical Service Bulletin 21 03 19. This issue is attributed to fatigue in the camshaft lobe driving the pump under sustained high-load operation. From 2022, revised metallurgy and updated control calibration were introduced to improve durability.
Production years 2020–2023 meet Euro 6d-Full standards (VCA UK Type Approval #VCA/EMS/9247).
The Alfa Romeo AR 10527 is a 1,995 cc inline‑four turbocharged petrol engine from the FireFly GSE family (2020–2023). It combines MultiAir IV valve control with gasoline direct injection to deliver sharp throttle response and strong mid-range torque. Designed to meet Euro 6d-Full emissions standards, it balances sporty performance with modern efficiency requirements.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,995 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Turbocharged (twin-scroll) | |
| Bore × stroke | 88.3 mm × 81.3 mm | |
| Power output | 140 kW (190 PS) @ 5,750 rpm | |
| Torque | 300 Nm @ 2,500–4,500 rpm | |
| Fuel system | Direct injection (Bosch MED 17.8.8) | |
| Emissions standard | Euro 6d-Full | |
| Compression ratio | 9.8:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Single twin-scroll turbo (IHI RHF6 VVT) | |
| Timing system | Chain-driven (integrated into cylinder head) | |
| Oil type | SAE 0W-20, ACEA C5 | |
| Dry weight | 132 kg |
The MultiAir IV system enables precise valve control for improved low-end response and emissions but demands strict adherence to 15,000 km oil change intervals using SAE 0W-20 ACEA C5 oil to prevent actuator wear. The twin-scroll turbo reduces lag but requires proper cooldown after spirited driving to prevent bearing coking. Direct injection increases susceptibility to intake valve coking; periodic cleaning is recommended. Post-2022 models benefit from improved high-pressure fuel pump lobe durability per Alfa Romeo SIB 21 03 19.
Oil Specs: Requires ACEA C5 specification with low SAPS formulation (Alfa Romeo SIB 21 03 19). Compatible with API SN/SP standards.
Emissions: Euro 6d-Full certification applies to all production years (2020–2023) (VCA Type Approval #VCA/EMS/9247).
Power Ratings: Measured under ECE R85 standards. Output consistent across fuel qualities due to dual lambda control and knock sensing (Alfa Romeo TIS Doc. D37010).
Alfa Romeo Technical Information System (TIS): Docs D35702, D36184, SIB 21 03 19
VCA Type Approval Database (VCA/EMS/9247)
ISO 8854: Road vehicles — Light and heavy duty engines — Determination of gaseous emissions
The Alfa Romeo AR 10527 was used across Alfa Romeo's 952/953 platforms with longitudinal mounting and no licensed external applications. This engine received platform-specific calibrations—sport-tuned ECU maps in the Giulia and revised torque delivery in the Stelvio—and from 2022 the facelifted Giulia models adopted updated MultiAir IV calibration with improved oil flow monitoring, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped vertically on the left-side cylinder block near the exhaust manifold (Alfa Romeo TIS D35914). The 8th VIN digit indicates engine family ('L' for AR 10527 series). Pre-2022 models have red Alfa Romeo script on the cam cover; post-2022 units use black script. Critical differentiation from AR 10528: AR 10527 produces 190 PS with standard turbo boost, while AR 10528 delivers 200 PS with revised wastegate control. Service parts require production date verification—high-pressure fuel pump assemblies for pre-2022 models are incompatible with later revisions due to cam lobe redesign (Alfa Romeo SIB 21 03 19).
The AR 10527's primary reliability risk is high-pressure fuel pump drive lobe wear under sustained load, with elevated incidence in mixed urban/highway driving. Internal Alfa Romeo quality reports from 2022 indicated a notable share of pre-2022 units required pump replacement before 90,000 km, while UK DVSA records show increased catalytic converter degradation in high-mileage examples. Extended oil intervals and low-quality fuel significantly increase wear, making fluid quality and service adherence critical.
Analysis derived from Alfa Romeo technical bulletins (2020–2023) and UK DVSA failure statistics (2021–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about ALFA-ROMEO AR10527.
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