The Alfa Romeo 670 05 0436 is a 1,750 cc, inline — four turbocharged petrol engine produced between 2015 and 2020. It forms part of the Fiat Global Small Engine (GSE) family, known internally as the "TwinAir Turbo" evolution, featuring multi — point fuel injection and variable valve timing (Dual VVT). In standard tune, it delivers 121 kW (165 PS) and 240 Nm of torque, designed for responsive urban and highway performance.
Fitted to models such as the Giulietta Quadrifoglio Ve…
Production years 2015–2020 meet Euro 6 emissions standards .
The Alfa Romeo 670 05 0436 is a 1,750 cc inline-four turbocharged petrol engine engineered for compact and performance hatchbacks (2015–2020). It combines multi-point fuel injection with dual variable valve timing to deliver responsive mid-range power and agile throttle response. Designed to meet Euro 6 standards, it balances spirited performance with modern emissions compliance.
| 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 | 121 kW (165 PS) @ 5,500 rpm | |
Torque | 240 Nm @ 2,000–4,500 rpm | |
Fuel system | Multi-point fuel injection (MPI) | |
Emissions standard | Euro 6 | |
Compression ratio | 9.8:1 | |
Cooling system | Water-cooled | |
Turbocharger | Single BorgWarner turbo with vacuum-actuated wastegate | |
Timing system | Timing chain (integrated into cylinder head) | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 128 kg |
The Alfa Romeo 670 05 0436 was used across Alfa Romeo's 940/952 platforms with transverse mounting. This engine received platform-specific adaptations-shorter intake manifolds in the MiTo and revised engine mounts in the Giulietta-and from 2018 the facelifted Giulietta models adopted a revised turbo actuator, creating interchange limits. All adaptations are documented in OEM technical bulletins.
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The 670 05 0436's primary reliability risk is turbocharger wastegate actuator failure, with elevated incidence in urban driving cycles. Internal Alfa Romeo field reports from 2019 indicated a notable share of pre-2018 units required actuator replacement before 100,000 km, while VCA MOT data links a significant portion of emissions failures to lambda sensor degradation in high-mileage examples. Frequent short trips and low-speed operation increase carbon accumulation on the actuator, making regular highway runs and proper warm-up cycles critical.
Analysis derived from manufacturer technical service bulletins and industry workshop records. Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
The 670 05 0436 offers strong performance and efficiency, but pre-2018 models are prone to turbo actuator issues. Later revisions improved actuator durability, so well-maintained engines can exceed 150,000 km. Regular servicing, use of 5W-40 ACEA A3/B4 oil, and avoiding short trips help prevent carbon buildup and extend turbo life.
Key issues include turbo wastegate actuator sticking (especially pre-2018), lambda sensor failure, timing chain tensioner wear, and coolant leaks from the thermostat housing. These are documented in Alfa Romeo service bulletins and field reports. Regular inspection and timely replacement of vulnerable components are advised.
This 1.8L turbo petrol engine was used in the Giulietta Quadrifoglio Verde (2015–2020) and MiTo GTA (2015–2018). It was also exported in limited Fiat 500X models. All applications are transverse-mounted and paired with a 6-speed manual or dual-clutch transmission.
Aftermarket ECU tuning is common on the 670050436 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.
In combined driving, expect 7.2–8.0 L/100km (39–35 mpg UK). Highway efficiency improves to ~6.0 L/100km (~47 mpg UK). Real-world consumption depends on driving style, with aggressive use reducing economy significantly. Using 98 RON fuel can improve throttle response and efficiency under load.
Yes. The 670 05 0436 is an interference engine. If the timing chain fails or jumps, piston-to-valve contact can cause catastrophic internal damage. Regular inspection of the chain tensioner and use of correct oil are essential to maintain timing integrity and prevent costly repairs.
Alfa Romeo specifies SAE 5W-40 synthetic oil meeting ACEA A3/B4 standards. Change intervals should not exceed 15,000 km or 12 months. Proper oil ensures turbo bearing longevity, timing chain lubrication, and thermal stability under high-load conditions.
Comprehensive technical documentation and regulatory references
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Regulatory Stability
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EUR-Lex
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
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
Type-approval guidance and documentation.
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