The Alfa Romeo AR 06412 is a 1,408 cc, inline-four turbocharged petrol engine produced between 2012 and 2016. It features a compact turbocharger, direct and port fuel injection (MultiAir II), and variable valve timing, delivering 103 kW (140 PS) at 5,500 rpm and 206 Nm of torque from 1,750–4,000 rpm. This engine was engineered for responsive urban performance and improved fuel efficiency in Alfa Romeo’s front-wheel-drive compact platforms.
Fitted primarily to the 955 Giulietta and 940 MiTo, the AR 06412 was tuned for agile city driving and smooth highway cruising. Its MultiAir II technology enables precise control of intake airflow, enhancing low-end torque and reducing emissions. Emissions compliance was achieved via a close-coupled three-way catalytic converter and lambda feedback system, enabling Euro 5 certification across its production run.
One documented concern is premature wear of the timing belt tensioner, particularly in vehicles with extended service intervals. Highlighted in Alfa Romeo Service Information Bulletin 48/2014, this issue stems from inadequate tensioner damping under thermal cycling. From 2014, revised tensioner components with improved elastomer damping were introduced to enhance durability.
All production years 2012–2016 meet Euro 5 emissions standards (VCA UK Type Approval #VCA/EMS/5123).
The Alfa Romeo AR 06412 is a 1,408 cc inline-four turbocharged petrol engine designed for compact and subcompact applications (2012–2016). It utilizes MultiAir II variable valve actuation and gasoline direct injection to deliver responsive low-end torque and improved fuel economy. Designed to meet Euro 5 emissions standards, it balances sporty character with regulated efficiency.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,408 cc | |
| Fuel type | Petrol | |
| Configuration | Inline-4, DOHC, 16-valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 76.0 mm × 77.0 mm | |
| Power output | 103 kW (140 PS) @ 5,500 rpm | |
| Torque | 206 Nm @ 1,750–4,000 rpm | |
| Fuel system | MultiAir II with direct and port injection | |
| Emissions standard | Euro 5 | |
| Compression ratio | 9.8:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | IHI turbocharger with vacuum-actuated wastegate | |
| Timing system | Timing belt (replaced at 120,000 km or 6 years) | |
| Oil type | Fiat 9.55535-S1 (SAE 5W-40) | |
| Dry weight | 115 kg |
The MultiAir II system provides strong low-RPM torque ideal for city driving but requires strict adherence to 15,000 km oil change intervals using Fiat 9.55535-S1 (5W-40) oil to prevent turbo and valve train wear. The timing belt must be replaced every 120,000 km or 6 years, whichever comes first, per Technical Bulletin 48/2014. Extended idling after high-load operation should be avoided to reduce coking in the turbo actuator. Direct injection necessitates periodic intake valve cleaning. Early models (pre-2014) are prone to tensioner wear; updated components mitigate this risk. Emissions systems require full operating temperature for accurate diagnostics.
Oil Specs: Requires Fiat 9.55535-S1 (5W-40) specification (Alfa Romeo SIB 48/2014). Replaced by S2 in later engines.
Emissions: Certified to Euro 5 across all model years (VCA Type Approval #VCA/EMS/5123). No Euro 6 variants exist.
Power Ratings: Measured under ECE R85 standards. Output optimized for 95 RON fuel (Alfa Romeo TIS Doc. 60.74.22).
Alfa Romeo Technical Information System (TIS): Docs 60.74.22, SIB 48/2014
VCA Type Approval Database (VCA/EMS/5123)
ISO 1585:1996 Road vehicles — Test method for the measurement of gaseous pollutant emissions
The Alfa Romeo AR 06412 was used across Alfa Romeo's 940/955 platforms with transverse front-wheel-drive layout and shared architecture with Fiat Powertrain Technologies (FPT). This engine received platform-specific tuning—slightly higher boost in the 955 Giulietta and reduced turbo lag in the 940 MiTo—and from 2014 the facelifted 955 Giulietta models adopted revised timing belt tensioners, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped horizontally on the right-side cylinder block near the exhaust manifold (Alfa Romeo TIS 60.74.22). The 8th VIN digit indicates engine type ('C' for AR 06412 petrol turbo). Pre-2014 models have a silver valve cover with exposed timing belt housing; post-2014 units feature revised tensioner damping. Critical differentiation from NA variants: AR 06412 has a turbocharger mounted to the left-side exhaust manifold and a compact intake manifold. Service parts require production date verification—tensioners for pre-2014 builds are incompatible with post-LCI models due to internal redesign (Alfa Romeo SIB 48/2014).
The AR 06412's primary reliability risk is timing belt tensioner wear on early builds, with elevated incidence in mixed urban/highway use. Internal Alfa Romeo quality reports from 2015 noted a significant share of pre-2014 engines requiring tensioner replacement before 100,000 km, while UK DVSA records indicate timing-related DTCs as a leading cause of emissions test failures. Frequent short trips and delayed service intervals increase wear, making adherence to maintenance schedules critical.
Analysis derived from Alfa Romeo technical bulletins (2012-2016) and UK DVSA failure statistics (2016-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about ALFA-ROMEO AR06412.
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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