The Chrysler A126 is a 2,000 cc, inline‑four turbocharged petrol engine produced between 2019 and 2023. It features gasoline direct injection (GDI), dual overhead camshafts (DOHC), and a single — scroll turbocharger, delivering 270 hp (201 kW) and 295 lb‑ft (400 Nm) of torque. The twin — scroll turbo design enables rapid boost response, minimizing lag for strong low — end pull and confident overtaking.
Fitted primarily to the Giorgio — platform Alfa Romeo Giulia and Stelv…
Production years 2019–2023 meet Euro 6d-TEMP emissions standards .
The Chrysler A126 is a 2,000 cc inline-four turbo petrol engine engineered for premium sports sedans and SUVs (2019-2023). It combines gasoline direct injection with a twin-scroll turbocharger to deliver responsive, high-output performance. Designed to meet Euro 6d-TEMP emissions standards, it balances spirited driving dynamics with regulatory compliance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,000 cc | |
Fuel type | Petrol (Gasoline) | |
Configuration | Inline-4, DOHC, 16-valve | |
Aspiration | Turbocharged | |
Bore × stroke | 84.0 mm × 90.0 mm | |
Power output | 270 hp (201 kW) @ 5,250 rpm | |
Torque | 295 lb-ft (400 Nm) @ 2,250 rpm | |
Fuel system | Gasoline direct injection (GDI), Bosch HDEV6 injectors | |
Emissions standard | Euro 6d-TEMP | |
Compression ratio | 9.8:1 | |
Cooling system | Water-cooled | |
Turbocharger | Single twin-scroll turbo (IHI VF46) | |
Timing system | Chain-driven DOHC with Variable Valve Timing (VVT) | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 345 lbs (156 kg) |
The Chrysler A126 was used across FCA's Giorgio platform with longitudinal mounting and was not licensed to other manufacturers. This engine received platform-specific adaptations-primarily related to engine management calibration for the Quadrifoglio's performance variant. All adaptations are documented in OEM technical bulletins.
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The A126's primary long-term reliability consideration is maintaining oil quality and level to protect the turbocharger and timing chain. Internal FCA service data indicates that the majority of turbo-related faults are linked to infrequent oil changes or using incorrect oil viscosity. Carbon buildup on intake valves is common for GDI engines and can affect performance. Regular maintenance with the correct specification is critical for longevity.
Analysis derived from FCA technical bulletins (2019-2023) and internal service reports. 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
Yes, the A126 is generally reliable with proper maintenance. Its design is robust, and the timing chains are durable. The key to long-term reliability is strict adherence to oil change intervals using the correct 5W-40 viscosity oil to protect the turbocharger and timing chain. With proper care, these engines can reliably reach 150,000 miles or more.
The most frequent issues are HPFP cam lobe wear (on early 2019 models), intake valve carbon buildup (common to GDI engines), timing chain tensioner wear, and turbocharger wastegate rattle. These are well-documented in FCA service bulletins and repair manuals.
The 2.0L A126 engine is used exclusively in Alfa Romeo vehicles, specifically the Giulia sedan and Stelvio SUV from the 2019 to 2023 model years. It is the standard engine for all non-Quadrifoglio trims and is also used in the Quadrifoglio as a base for its higher-output tune.
Yes, the A126 responds very well to tuning. A simple ECU remap can yield gains of 30-50 horsepower. More significant power increases can be achieved with upgraded intercoolers, downpipes, and turbos. The stock internals are strong enough for moderate power increases, making it a popular platform for enthusiasts.
Fuel economy is respectable for a high-performance turbocharged engine. In the Alfa Romeo Giulia, expect around 23-25 mpg (US) in city driving and 31-33 mpg (US) on the highway. Real-world figures will vary based on driving style and vehicle condition.
Yes. The Chrysler A126 is an interference engine. This means that if the timing chain were to fail or jump timing, the pistons would contact the valves, causing severe internal engine damage. This underscores the importance of maintaining proper oil level and quality to ensure the timing chain tensioners function correctly.
FCA specified API SP 5W-40 motor oil. This specific viscosity is crucial for protecting the turbocharger bearings. Modern equivalents meeting API SP standards in 5W-40 viscosity are suitable. Regular oil changes every 7,500-10,000 miles (or as indicated by the oil life monitor) are recommended.
Comprehensive technical documentation and regulatory references
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Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
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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