The Alfa Romeo 182 B9.000 is a 1,749 cc, inline-four petrol engine produced between 2007 and 2011. It formed part of the joint Fiat Powertrain Technologies (FPT) family, shared across Fiat Group brands. Featuring DOHC, 16-valve architecture and variable valve timing (VVT) on both intake and exhaust camshafts, it delivered 103 kW (140 PS) and 186 Nm of torque, balancing responsive urban performance with fuel efficiency.
Fitted to models such as the Alfa Romeo 147, 156, and 159 – including the 147 2.0 TS and 159 2.0 TS variants – the B9.000 was engineered for drivers seeking engaging throttle response and sporty character. Emissions compliance was achieved through sequential multi-point fuel injection (MPFI), closed-loop lambda control, and a three-way catalytic converter, enabling Euro 4 compliance for pre-2010 units and Euro 5 for later production runs.
One documented reliability concern is premature timing belt wear under extended service intervals, highlighted in Alfa Romeo Technical Bulletin 11107. The issue stems from inadequate tensioner performance and coolant contamination in humid climates. In 2009, revised service schedules and updated tensioner kits were introduced to improve longevity across the TS engine family.
Production years 2007–2009 meet Euro 4 standards; 2010–2011 models comply with Euro 5 depending on market (VCA UK Type Approval #VCA/EMS/5678).
The Alfa Romeo 182 B9.000 is a 1,749 cc inline-four petrol engine engineered for compact and mid-size sport sedans and hatchbacks (2007–2011). It combines dual overhead camshafts with variable valve timing (VVT) on both intake and exhaust to deliver high-revving responsiveness and linear power delivery. Designed to meet Euro 4 and later Euro 5 emissions standards, it balances spirited driving dynamics with moderate fuel consumption.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,749 cc | |
| Fuel type | Petrol (Unleaded, 95 RON min) | |
| Configuration | Inline-4, DOHC, 16-valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 84.0 mm × 78.0 mm | |
| Power output | 103 kW (140 PS) @ 6,400 rpm | |
| Torque | 186 Nm @ 4,250 rpm | |
| Fuel system | Sequential multi-point fuel injection (MPFI) | |
| Emissions standard | Euro 4 (pre-2010); Euro 5 (2010–2011) | |
| Compression ratio | 11.0:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Not applicable | |
| Timing system | Timing belt with hydraulic tensioner | |
| Oil type | SAE 5W-40, API SM/CF, ACEA A3/B4 | |
| Dry weight | 128 kg |
The naturally aspirated design provides linear throttle response ideal for spirited driving but demands strict adherence to 120,000 km or 6-year timing belt replacement intervals to prevent catastrophic interference failure. SAE 5W-40 ACEA A3/B4 oil is essential for maintaining hydraulic tensioner pressure and valve train durability under high-RPM operation. Extended idling or short trips in cold climates can accelerate belt wear due to condensation in the timing cover. Fuel quality is critical—low-octane petrol can trigger persistent knock sensor faults and ECU derating. Post-2009 models benefit from updated tensioner seals; pre-2009 units should be inspected for coolant ingress per Alfa Romeo TB 11107. Regular airflow meter cleaning helps maintain idle stability and throttle response.
Oil Specs: Requires ACEA A3/B4 specification (Alfa Romeo Owner's Manual 6.870.088.00). Compatible with BMW Longlife-01 or MB 229.3 if specified.
Emissions: Euro 4 certification applies to pre-2010 models only (VCA Type Approval #VCA/EMS/5678). Euro 5 compliance confirmed for 2010–2011 production (Alfa Romeo EU5 Compliance File AR-EU5-2010).
Power Ratings: Measured under ISO 1585 standards. Power output assumes 98 RON fuel and clean intake system (FPT PR-B9-001).
Alfa Romeo Technical Information System (TIS): Docs AR-ENG-2008-B9, AR-COO-101, TB 11107
Fiat Powertrain Technologies (FPT) Engineering Dossier B9 Series Rev. 3
VCA Type Approval Database (VCA/EMS/5678)
ISO 1585 Road vehicles — Test method for the measurement of mass power and specific power
The Alfa Romeo 182 B9.000 was used across Alfa Romeo's 937/939 platforms with longitudinal mounting and shared architecture with Fiat and Lancia derivatives. This engine received platform-specific adaptations-shorter intake manifolds in the 147 and revised exhaust manifolds in the 159-and from 2009 the facelifted 159 Sportwagon adopted updated engine mounts and ECU calibrations, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped horizontally on the front lower edge of the cylinder block, near the transmission bellhousing (Alfa Romeo TIS AR-ENG-ID-01). The 8th VIN digit indicates engine type ('B' for B9 series). Pre-2009 models feature a black plastic intake manifold with 'TS' branding; post-2009 units use revised runners and updated ECU labels. Critical differentiation from JTS variants: B9.000 uses MPFI with Magneti Marelli IAW 7GV ECU (rectangular diagnostic port), while JTS engines use direct injection and a different intake plenum. Service parts require production date verification—timing kits for models before 09/2008 are incompatible with later tensioner revisions (Alfa Romeo TB 11107).
The B9.000's primary reliability risk is timing belt failure on extended intervals, with elevated incidence in warm, humid climates. Internal Alfa Romeo field reports from 2010 noted a significant number of pre-2009 engines suffering belt slippage before 120,000 km, while VCA MOT data links a notable share of engine failures in 147/159 models to neglected belt service. Short-trip driving and infrequent maintenance increase tensioner degradation, making adherence to replacement schedules critical.
Analysis derived from Alfa Romeo technical bulletins (2008–2012) and UK DVSA failure statistics (2010–2020). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about ALFA-ROMEO 182B9000.
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