The Alfa Romeo AR 67303 is a 1,750 cc, inline — four turbocharged petrol engine produced between 2016 and 2020. It serves as a higher — tuned evolution of the AR 67299 platform, delivering 177 kW (240 PS) and 340 Nm of torque. This engine features direct fuel injection, dual variable valve timing (Dual VVT), and a compact BorgWarner EFR turbocharger, enabling rapid throttle response and strong mid — range performance typical of Alfa Romeo's sport — focused engineering.
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All production years (2016–2020) comply with Euro 6b emissions standards .
The Alfa Romeo AR 67303 is a 1,750 cc inline‑four turbocharged petrol engine engineered for high-performance applications (2016–2020). It combines direct fuel injection with dual variable valve timing and a high-flow turbocharger to deliver race-inspired throttle response and sustained power output. Designed to meet Euro 6b emissions standards, it integrates performance with regulatory requirements.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,750 cc | |
Fuel type | Petrol | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 84.0 mm × 78.0 mm | |
Power output | 177 kW (240 PS) @ 5,700–6,500 rpm | |
Torque | 340 Nm @ 2,000–4,500 rpm | |
Fuel system | Direct injection (up to 200 bar) | |
Emissions standard | Euro 6b | |
Compression ratio | 9.8:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Single BorgWarner EFR turbo with internal wastegate | |
Timing system | Chain-driven (integrated in rear cover) | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 128 kg |
The Alfa Romeo AR 67303 was used in Alfa Romeo's high-performance 952/956 platforms with longitudinal mounting and rear-wheel-drive layout. This engine received performance-specific adaptations—forged internals, high-flow turbo, and charge cooling—from launch. From 2018, the Stelvio Quadrifoglio adopted the same calibration as the Giulia, with identical ECU maps and boost curves. All variants are documented in OEM technical bulletins and require specific service procedures.
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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 67303 is a high-performance engine designed for spirited use. When maintained properly—with regular oil changes using 5W-40 ACEA A3/B4 oil and premium fuel (RON 98)—it is dependable. Track use increases thermal stress, so cooling system maintenance and post-drive idle periods are recommended. No widespread reliability issues have been reported in official Alfa Romeo bulletins.
The most frequent issues include turbo wastegate actuator sticking, intercooler pipe leaks under boost, and timing chain tensioner wear. These are typically maintenance-related. Oil leaks from the valve cover gasket are also observed in higher-mileage examples. All are serviceable using OEM procedures and parts.
This 2.0L turbo petrol engine is exclusive to the Giulia Quadrifoglio (2016–2020) and Stelvio Quadrifoglio (2017–2020). It delivers 240 PS in both applications and features performance-specific tuning, cooling, and intake systems. Production spanned 2016–2020, with all models meeting Euro 6b emissions standards.
Aftermarket ECU tuning is common on the AR67303 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.
Moderate to high consumption. In a Giulia Quadrifoglio, combined consumption is ~9.8 L/100km (~29 mpg UK). City driving may exceed 12 L/100km, while highway runs can achieve 7.5 L/100km. Real-world figures depend heavily on driving style, but expect 25–30 mpg (UK) on mixed routes for a healthy engine.
Yes. The AR 67303 is an interference engine. If the timing chain fails or jumps, pistons can collide with open valves, causing catastrophic internal damage. Proper maintenance and timely replacement of tensioners and guides are essential to prevent costly repairs.
Alfa Romeo specifies SAE 5W-40 synthetic oil meeting ACEA A3/B4 standards. Use only API SN/CF rated oils designed for turbocharged petrol engines. Change intervals should not exceed 10,000 km or 12 months to ensure turbo and timing system lubrication and prevent deposit formation.
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EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
UK type-approval authority for automotive products.
Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
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Type-approval guidance and documentation.
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