The Vauxhall A20DTE is a 1,956 cc, inline‑four turbo‑diesel engine produced between 2011 and 2018. It features a dual overhead camshaft (DOHC) 16‑valve layout with high — pressure common‑rail direct injection and a variable geometry turbocharger (VGT), delivering 103 kW (140 PS) and 320 Nm of torque. The use of a Bosch CP4.2 injection system enables precise fuel metering up to 1,800 bar, improving combustion efficiency and reducing particulate emissions.
Fitted to mod…
All production years (2011–2018) meet Euro 5b emissions standards .
The Vauxhall A20DTE is a 1,956 cc inline‑four turbo‑diesel engineered for mid-size sedans and MPVs (2011–2018). It combines Bosch CP4.2 common-rail injection with a variable-geometry turbocharger to deliver responsive mid-range torque and efficient highway cruising. Designed to meet Euro 5b emissions standards, it integrates DPF and EGR for regulatory compliance while maintaining drivability.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,956 cc | |
Fuel type | Diesel | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 83.0 mm × 90.4 mm | |
Power output | 103 kW (140 PS) @ 4,000 rpm | |
Torque | 320 Nm @ 2,000 rpm | |
Fuel system | Bosch CP4.2 common‑rail (up to 1,800 bar) | |
Emissions standard | Euro 5b | |
Compression ratio | 16.0:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Single variable‑geometry turbo (Honeywell) | |
Timing system | Chain‑driven DOHC | |
Oil type | GM‑LL‑B‑025 (SAE 5W‑30) | |
Dry weight | 142 kg |
The Vauxhall A20DTE was used across Vauxhall's J/B platforms with transverse mounting and no external licensing. This engine received platform-specific adaptations—revised engine mounts in the Insignia B and modified exhaust manifolds in the Astra J—and from 2015 minor ECU updates improved DPF regeneration logic, creating minor software interchange limits. All adaptations are documented in OEM technical bulletins.
Engine Finders UK Ltd, which operates EngineCode.uk, can pass your enquiry to engine suppliers in the UK. The service is for vehicles in the United Kingdom, with UK delivery or fitting. This is a commercially connected service, and sending an enquiry does not confirm diagnosis or compatibility.
Diagnostic reminder: If a technician has recommended replacing the engine, you can send an enquiry to engine suppliers in the UK. Confirm the diagnosis first: an engine-code record does not diagnose a fault.
Field reports and technical service bulletins highlight component wear patterns under high-load operation. Adherence to manufacturer service intervals and approved fluid specifications is critical for long-term reliability.
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 A20DTE offers strong torque and good refinement, but early units (2011–2014) are prone to CP4.2 fuel pump failures if low-quality diesel is used. Later revisions improved pump durability. Regular oil changes with GM‑LL‑B‑025 oil, EN 590 diesel, and occasional highway driving greatly enhance longevity beyond 200,000 km.
Top issues include Bosch CP4.2 high-pressure fuel pump wear, DPF regeneration problems from short trips, EGR cooler leaks, and timing chain tensioner wear. These are well-documented in Vauxhall service bulletins TIS‑20‑06‑04 and TIS‑20‑02‑09.
It powered the Astra J (2011–2015), Insignia B (2011–2018), and Zafira Tourer C (2011–2015) in 2.0 CDTi 140 guise. Holden also used it in the Commodore VF (2013–2017) for Australian markets. All meet Euro 5b emissions.
Aftermarket ECU tuning is common on the A-20-DTE 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 an Insignia or Astra J, expect ~6.2 L/100km (city) and ~4.5 L/100km (highway), or about 47 mpg UK combined. Real‑world mixed driving typically returns 42–50 mpg UK, depending on condition, driving style, and DPF regeneration cycles.
Yes. The A20DTE is an interference design. If the timing chain fails or jumps, piston‑to‑valve contact can cause catastrophic damage. Chain inspection every 120,000 km is recommended despite its 'lifetime' designation.
Vauxhall specifies GM‑LL‑B‑025 compliant oil (5W‑30). Always use a quality synthetic oil meeting this standard and change it every 15,000 km or 12 months to protect the fuel system, timing components, and maintain engine cleanliness.
Comprehensive technical documentation and regulatory references
EngineCode.uk is operated by Engine Finders UK Ltd. It provides engine-reference information and an optional commercial enquiry service. It is not an official manufacturer website. Check the record's sources and confirm vehicle-specific details before relying on it for parts, repairs or replacement.
Our editorial standard prioritises relevant manufacturer documentation and official regulatory sources. The sources and verification status for a record should be checked alongside the data.
A statement is not verified merely because a source is listed. Where supporting evidence is missing or conflicting, the record should identify that limitation. Please report unsupported or inconsistent information.
Transparency in gaps
A missing or unverified value does not mean the manufacturer has withheld it. We distinguish information not yet verified, information not available to us, and information explicitly not disclosed by the source.
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.
Records are subject to review and correction. Source links, dates and verification notes should be read with the technical information. Our Editorial and Sourcing Policy explains our standards and review process.
Found an error or missing source? Report a problem with this page. Include the field or statement concerned and a supporting source if available. You can also email corrections@enginecode.uk.
Copyright and permissions
Images and other material may be protected by copyright. Attribution does not by itself grant permission to reuse material. If you believe material on this site infringes your rights, contact copyrights@enginecode.uk with the page URL and details of your claim. We will review the material and take appropriate action.
Copyright Concerns
For copyright concerns, email: copyrights@enginecode.uk
Our Privacy Policy explains how Engine Finders UK Ltd uses information from visits, vehicle lookups, enquiries and messages. Our Cookie Policy explains cookies and similar technologies and how to change your choices.
For access, correction, or deletion requests, email: gdpr@enginecode.uk
Trademark Notice
All trademarks, logos, and engine codes are the property of their respective owners. Use on this site is strictly for reference and identification.
Ownership and commercial services
EngineCode.uk is owned and operated by Engine Finders UK Ltd. Alongside our reference content, we offer an optional replacement-engine enquiry service through Engine Finders and may identify relevant services provided by businesses connected with us. These commercial connections are disclosed. Using an enquiry service is not required to read our reference content.
Engine Finders UK Ltd operates this website. Our optional enquiry service has a commercial purpose. Our Ownership and Commercial Disclosure explains the relationship between the reference website and that service. Participating suppliers pay a fee or subscription to participate on the network and receive quote requests.
Use this record as a starting point for identification. Specifications and vehicle applications may contain errors or omissions. Confirm the exact engine variant and compatibility using vehicle-specific documentation and a qualified supplier or technician.
All external links open in new tabs. Please verify current availability of resources.