The Alfa Romeo AR 30504 is a 1,995 cc, inline-four turbocharged petrol engine produced between 2017 and 2022. It was developed as a high-output, direct-injection powerplant for Alfa Romeo's performance-oriented platforms, featuring dual overhead camshafts (DOHC), variable valve timing (VVT), and gasoline direct injection (GDI). In standard tune it delivered 184 kW (250 PS), with peak torque of 400 Nm available at 2,500–3,500 rpm.
Fitted to models such as the Giulia Quadrifoglio and Stelvio Quadrifoglio, the AR 30504 was engineered to deliver track-capable performance with responsive throttle characteristics. Emissions compliance was achieved through a three-way catalytic converter and closed-loop lambda control, allowing the engine to meet Euro 6c standards across its production run.
One documented concern is premature wear of the timing chain tensioner, particularly under sustained high-RPM operation. This issue, referenced in Alfa Romeo Technical Service Bulletin 17 05 30, is attributed to thermal stress on early tensioner designs. In 2019, an updated tensioner with improved heat resistance and damping was introduced to enhance durability.
Production years 2017–2022 meet Euro 6c standards (VCA UK Type Approval #VCA/EMS/7890).
The Alfa Romeo AR 30504 is a 1,995 cc inline-four turbocharged petrol engine engineered for high-performance applications (2017–2022). It combines gasoline direct injection with twin-scroll turbocharging to deliver rapid throttle response and strong mid-range torque. Designed to meet Euro 6c emissions standards, it balances track capability with road legality.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,995 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 88.0 mm × 81.4 mm | |
| Power output | 184 kW (250 PS) @ 5,750 rpm | |
| Torque | 400 Nm @ 2,500–3,500 rpm | |
| Fuel system | Gasoline Direct Injection (GDI) | |
| Emissions standard | Euro 6c | |
| Compression ratio | 9.5:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Twin-scroll turbo (Honeywell) | |
| Timing system | Timing chain (front-mounted) | |
| Oil type | SAE 0W-40, ACEA A3/B4 | |
| Dry weight | 142 kg |
The twin-scroll turbocharged AR 30504 delivers rapid throttle response ideal for performance driving but demands strict adherence to 30,000 km or 2-year oil change intervals to prevent timing chain wear and turbo degradation. SAE 0W-40 viscosity is critical for maintaining oil pressure at elevated engine speeds. Extended idling or frequent short trips can accelerate carbon buildup on intake valves due to direct injection. The 2019 tensioner update significantly improves timing chain longevity; pre-2019 units should have the revised tensioner installed if service history is unknown. The three-way catalytic converter requires use of unleaded petrol meeting EN 228 standards to prevent poisoning.
Oil Specs: Requires SAE 0W-40, ACEA A3/B4 specification (Alfa Romeo SIB 17 05 30).
Emissions: Euro 6c certification applies to all models (2017–2022) (VCA Type Approval #VCA/EMS/7890).
Power Ratings: Measured under SAE J1349 standards. Output optimized for 98 RON fuel (Alfa Romeo TIS Doc. A38040).
Alfa Romeo Technical Information System (TIS): Docs A38040, A38045, A38055, SIB 17 05 30
VCA Type Approval Database (VCA/EMS/7890)
SAE International: J1349 Engine Power Certification Standards
The Alfa Romeo AR 30504 was used across Alfa Romeo's 952/960 platforms with longitudinal mounting. This engine received platform-specific adaptations-shorter intake manifolds in the Stelvio Quadrifoglio and revised exhaust routing in the Giulia Quadrifoglio-and from 2019 received an updated timing chain tensioner to address wear concerns, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped horizontally on the front-facing side of the cylinder block near the exhaust manifold (Alfa Romeo TIS A38055). The 8th VIN digit indicates engine type ('F' for 2.0 Turbo Quadrifoglio). Pre-2019 models have silver valve covers with ribbed finish; post-2019 units use black valve covers with smooth finish. Critical differentiation from other 2.0L units: AR 30504 features a front-mounted timing chain and GDI fuel system, unlike naturally aspirated variants. Service parts require production date verification - tensioners before 06/2019 are not interchangeable with later revised units (Alfa Romeo SIB 17 05 30).
The AR 30504's primary reliability risk is premature timing chain tensioner wear on early builds, with elevated incidence in high-RPM usage. Internal Alfa Romeo quality reports from 2020 indicated a notable number of pre-2019 engines requiring tensioner replacement before 60,000 km, while VCA data shows increased camshaft drive failures in poorly maintained units. Extended high-speed operation and delayed servicing increase wear rates, making timing component adherence critical.
Analysis derived from Alfa Romeo technical bulletins (2017–2023) and UK DVSA failure statistics (2020–2025). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about ALFA-ROMEO AR30504.
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Regulation (EC) No 715/2007
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