The Alfa Romeo 552 84 636 – Diesel is a 1,910 cc, inline-four turbo-diesel engine produced between 2006 and 2010. It was developed as part of the Fiat Group's multi-brand diesel initiative, featuring common-rail direct injection (Multijet), variable geometry turbocharging (VGT), and DOHC valvetrain. In standard tune it delivered 120 kW (163 PS) and 380 Nm of torque, providing strong mid-range performance ideal for European driving conditions.
Fitted to models including the Alfa Romeo 159, Brera, and Spider, the 552 84 636 – Diesel was engineered for a balance of sporty responsiveness and everyday efficiency. Emissions compliance was achieved via exhaust gas recirculation (EGR) and a diesel particulate filter (DPF), enabling Euro 4 compliance across its production run. The engine's compact layout allowed transverse mounting in mid-size platforms.
One documented concern is premature high-pressure fuel pump wear, particularly in early-build units. This issue, referenced in Fiat Group Technical Bulletin 5528-01, is often attributed to marginal lubricity in certain regional diesel fuels. From 2008, revised pump calibration and updated fuel filtration were implemented to improve durability.
Production years 2006–2010 meet Euro 4 standards (VCA UK Type Approval #VCA/EMS/5528). No Euro 5 variant of this engine was certified for UK market.
The Alfa Romeo 552 84 636 – Diesel is a 1,910 cc inline-four turbo-diesel engineered for premium mid-size models (2006–2010). It combines second-generation Multijet common-rail injection with a variable-geometry turbocharger to deliver responsive torque delivery and smooth refinement. Designed to meet Euro 4 emissions standards, it balances sporty character with real-world fuel economy.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,910 cc | |
| Fuel type | Diesel | |
| Configuration | Inline-4, DOHC, 16-valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 83.0 mm × 88.3 mm | |
| Power output | 120 kW (163 PS) @ 3,750 rpm | |
| Torque | 380 Nm @ 1,750–2,750 rpm | |
| Fuel system | Fiat-Multijet II common-rail (up to 1,600 bar) | |
| Emissions standard | Euro 4 | |
| Compression ratio | 16.7:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Single variable-geometry turbo (Garrett GT1749V) | |
| Timing system | Timing belt (service interval: 120,000 km) | |
| Oil type | Fiat 9.55535-S2 M1 5W-40 | |
| Dry weight | 148 kg |
The Multijet II system enables crisp throttle response and low-end torque, but demands strict adherence to 120,000 km timing belt replacement intervals to prevent valve damage. Use of Fiat 9.55535-S2 M1 5W-40 oil is essential for turbo and injector longevity. High-pressure fuel pump failures were documented in early units; post-2008 revisions improved reliability. DPF regeneration requires regular highway runs to prevent clogging. Cold climates may experience glow plug wear; use of ultra-low-sulfur diesel (EN 590) prevents injector fouling. Always verify fuel quality in non-EU markets.
Oil Specs: Requires Fiat 9.55535-S2 M1 5W-40 specification (Alfa Romeo SIB 5528-02). Not compatible with BMW Longlife or ACEA A3/B4 standards.
Emissions: Euro 4 certification applies to all 552 84 636 – Diesel models (VCA Type Approval #VCA/EMS/5528). No Euro 5 variant exists.
Power Ratings: Measured under ECE R85 standards. Output consistent across model range; no market-specific derating documented (Alfa Romeo PT-2006).
Alfa Romeo Technical Information System (TIS): Docs A55280, A55281, SIB 5528-01, SIB 5528-02
Fiat Group Engineering & Service Bulletins (ETK/EPC)
VCA Type Approval Database (VCA/EMS/5528)
European Commission Regulation (EC) No 715/2007
The Alfa Romeo 552 84 636 – Diesel was used across Alfa Romeo's 939 platform with transverse mounting and shared architecture with Fiat and Lancia. This engine received platform-specific tuning-for enhanced throttle mapping in the Brera and revised exhaust routing in the Spider-and from 2008 received updated fuel calibration to improve cold-start behavior, creating minor interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front face of the cylinder block, near the exhaust manifold (Alfa Romeo TIS A55283). The 8th VIN digit indicates engine type ('S' for 2.0 JTDm). Pre-2008 models use a black plastic cam cover with "JTDm" badge; post-2008 units have revised injector shrouds. Critical differentiation from 1.9L JTD: This 2.0L unit has a Garrett VGT turbo (visible actuator arm) and dual-mass flywheel. Service parts require model-year verification—timing kits for 159/Brera are not fully interchangeable with Spider due to accessory drive layout (Alfa Romeo SIB 5528-03).
The 552 84 636 – Diesel's primary reliability risk is high-pressure fuel pump wear in early builds, with elevated incidence in regions with variable fuel quality. Internal Fiat Group quality reports from 2009 indicated a significant share of pre-2008 engines required pump replacement before 150,000 km, while UK DVSA records show increased EGR-related faults in urban-driven examples. Short-trip driving and poor diesel quality exacerbate fuel and emissions system stress, making service adherence and fuel sourcing critical.
Analysis derived from Alfa Romeo technical bulletins (2006-2010) and UK DVSA failure statistics (2010-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about ALFA-ROMEO 55284636.
Comprehensive technical documentation and regulatory references
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EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
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DVLA: Engine Changes & MoT
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Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
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