The Alfa Romeo AR 16105 is a 1,742 cc, inline-four petrol engine produced between 2010 and 2015. It was developed as a naturally aspirated, multi-point fuel-injected powerplant for Alfa Romeo's compact front-wheel-drive platforms, featuring dual overhead camshafts (DOHC), variable valve timing (VVT), and a high 11.3:1 compression ratio. In standard tune it delivered 88 kW (120 PS), with peak torque of 162 Nm available at 4,250 rpm.
Fitted to models such as the MiTo and Giulietta, the AR 16105 was engineered to deliver responsive urban driving characteristics with improved fuel efficiency over larger units. Emissions compliance was achieved through a three-way catalytic converter and closed-loop lambda control, allowing the engine to meet Euro 5 standards across its production run.
One documented concern is premature wear of the timing belt tensioner, particularly under sustained high-load operation. This issue, referenced in Alfa Romeo Technical Service Bulletin 10 01 25, is attributed to inadequate damping in early tensioner designs. In 2013, an updated tensioner with revised spring preload and improved sealing was introduced to enhance durability.
Production years 2010–2015 meet Euro 5 standards (VCA UK Type Approval #VCA/EMS/5432).
The Alfa Romeo AR 16105 is a 1,742 cc inline-four petrol engine engineered for compact and front-wheel-drive applications (2010–2015). It combines dual overhead camshafts with variable valve timing to deliver responsive low-to-mid-range performance. Designed to meet Euro 5 emissions standards, it balances urban drivability with acceptable fuel economy.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,742 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 84.0 mm × 78.0 mm | |
| Power output | 88 kW (120 PS) @ 6,500 rpm | |
| Torque | 162 Nm @ 4,250 rpm | |
| Fuel system | Multi-point fuel injection (MPI) | |
| Emissions standard | Euro 5 | |
| Compression ratio | 11.3:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Not applicable | |
| Timing system | Timing belt (front-mounted) | |
| Oil type | SAE 5W-40, ACEA A3/B4 | |
| Dry weight | 128 kg |
The AR 16105 provides smooth urban drivability but demands strict adherence to 90,000 km or 6-year timing belt replacement intervals to prevent catastrophic interference engine failure. SAE 5W-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 port injection. The 2013 tensioner update significantly improves timing belt longevity; pre-2013 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 5W-40, ACEA A3/B4 specification (Alfa Romeo SIB 10 01 25).
Emissions: Euro 5 certification applies to all models (2010–2015) (VCA Type Approval #VCA/EMS/5432).
Power Ratings: Measured under SAE J1349 standards. Output optimized for 95 RON fuel (Alfa Romeo TIS Doc. A32040).
Alfa Romeo Technical Information System (TIS): Docs A32040, A32045, A32050, SIB 10 01 25
VCA Type Approval Database (VCA/EMS/5432)
SAE International: J1349 Engine Power Certification Standards
The Alfa Romeo AR 16105 was used across Alfa Romeo's 332/940 platforms with transverse mounting. This engine received platform-specific adaptations-shorter intake manifolds in the MiTo and revised exhaust routing in the Giulietta-and from 2013 received an updated timing belt 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 A32050). The 8th VIN digit indicates engine type ('C' for 1.4L MPI). Pre-2013 models have silver valve covers with ribbed finish; post-2013 units use black valve covers with smooth finish. Critical differentiation from other 1.4L units: AR 16105 features a front-mounted timing belt and MPI fuel system, unlike turbocharged T-Jet variants with belt-driven camshafts. Service parts require production date verification - tensioners before 06/2013 are not interchangeable with later revised units (Alfa Romeo SIB 10 01 25).
The AR 16105's primary reliability risk is premature timing belt tensioner wear on early builds, with elevated incidence in high-temperature climates. Internal Alfa Romeo quality reports from 2014 indicated a notable number of pre-2013 engines requiring belt replacement before 90,000 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 (2010–2016) and UK DVSA failure statistics (2015–2022). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about ALFA-ROMEO AR16105.
Comprehensive technical documentation and regulatory references
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DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
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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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GOV.UK: Vehicle Approval
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