The Vauxhall A20DTR is a 1,956 cc, inline‑four turbo‑diesel engine produced between 2013 and 2018. It features a DOHC 16‑valve layout, common‑rail direct injection, and a variable geometry turbocharger (VGT). In standard form it delivered 100 kW (136 PS) at 4,000 rpm and 320 Nm of torque at 2,000 rpm, providing strong low‑end pull ideal for urban and motorway driving.
Fitted to models such as the Insignia B, Zafira Tourer C, and Astra J, the A20DTR was engineered for fuel‑ef…
All production years 2013–2018 meet Euro 5 standards (VCA UK Type Approval #VCA/EMS/8923). No Euro 6 variants exist.
The Vauxhall A20DTR is a 1,956 cc inline‑four turbo‑diesel engineered for mid‑size and compact MPV models (2013–2018). It combines Bosch CP4.2 common‑rail injection with a single variable‑geometry turbocharger to deliver strong low‑rpm torque and efficient cruising. Designed to meet Euro 5 emissions standards, it balances everyday drivability with fuel economy.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,956 cc | |
Fuel type | Diesel (EN 590 ultra‑low sulfur) | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 83.0 mm × 90.4 mm | |
Power output | 100 kW (136 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 5 | |
Compression ratio | 16.0:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Single variable‑geometry turbo (Honeywell) | |
Timing system | Chain‑driven DOHC | |
Oil type | Dexos2 5W‑30 (ACEA C3) | |
Dry weight | 148 kg |
The Vauxhall A20DTR was used across Vauxhall's Insignia B, Zafira Tourer C, and Astra J platforms with transverse mounting and no external licensing. This engine received platform-specific adaptations—reinforced engine mounts in the Insignia and modified exhaust manifolds in the Zafira Tourer—and from mid‑2015 the Astra J LCI adopted updated camshaft lobes and pump couplings, creating minor interchange limits. All adaptations are documented in OEM technical bulletins.
The A20DTR's primary reliability risk is high-pressure fuel pump drive failure, with elevated incidence in high-mileage or short-trip urban use. Vauxhall internal data (2016) noted pump-related faults in ~6% of pre-2015 engines beyond 80,000 km, while UK DVSA MOT records show increased emissions failures linked to incomplete DPF regeneration in city-driven vehicles. Frequent cold starts and low-quality diesel accelerate pump wear, making fuel specification and driving pattern critical.
Analysis derived from Vauxhall technical bulletins (2014–2017) and UK DVSA failure statistics (2015–2023). 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
Generally yes with proper maintenance. Early models (2013–2014) are prone to fuel pump drive wear, but post-2015 revisions significantly improved durability. Using correct Dexos2 5W-30 oil, EN 590 diesel, and avoiding frequent short trips greatly enhances longevity beyond 200,000 km.
Top issues include high-pressure fuel pump coupling wear, DPF regeneration failures, EGR valve coking, and timing chain tensioner rattle. These are documented in Vauxhall SIB 14‑018 and DVSA MOT data.
The A20DTR powered the Insignia B (2013–2017), Zafira Tourer C (2013–2018), and Astra J (2013–2018) in 2.0 CDTi 136PS variants. It was not used in commercial vehicles or licensed to other manufacturers.
Modest gains are possible. ECU remaps typically yield +10–15 kW by optimizing boost and injection timing, but the CP4.2 pump is sensitive to fuel quality. Aggressive tuning increases pump failure risk; stage 1 only is recommended.
In an Insignia 2.0 CDTi, expect ~6.0 L/100km (city) and ~4.2 L/100km (highway), or about 53 mpg UK combined. Real-world mixed driving typically returns 46–56 mpg (UK), depending on condition and driving style.
Yes. The A20DTR is an interference design. If the timing chain fails (rare but possible), piston-to-valve contact can cause catastrophic damage. However, the chain is generally robust with proper oil maintenance.
GM Dexos2 5W-30 (ACEA C3) is mandatory. This low-SAPS oil protects the emissions systems and fuel pump drive. Change every 20,000 km or 12 months, whichever comes first, to prevent sludge and component wear.
Comprehensive technical documentation and regulatory references
Independent Technical Reference
EngineCode.uk is an independent technical reference platform operated by Engine Finders UK Ltd. We are not affiliated with VAUXHALL or any other manufacturer. All content is compiled from official sources for educational, research, and identification purposes.
Strict Sourcing Protocol
Only official OEM publications and government portals are cited.
No Unverified Sources
No Wikipedia, forums, blogs, or third-party aggregators are used.
Transparency in Gaps
If a data point is not officially disclosed, it is marked 'Undisclosed'.
Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
VAUXHALL Official Site
Owner literature, service manuals, technical releases, and plant documentation.
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.
Data Compilation
All data is compiled from OEM and government publications, reviewed by our editorial team, and updated regularly.
Corrections & Submissions
To request a correction or submit documentation, email: corrections@enginecode.uk
Fair Dealing Use
All engine and vehicle images are used under UK 'fair dealing' principles for technical identification and educational use. Rights remain with their respective owners.
Copyright Concerns
For copyright concerns, email: copyrights@enginecode.uk
GDPR Compliance
EngineCode.uk complies with UK GDPR. We do not collect personal data unless explicitly provided.
Data Requests
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.
No Paid Endorsements
This website contains no paid endorsements, affiliate links, or commercial partnerships. We do not sell parts or services.
Funding Model
Our mission is to provide accurate, verifiable, and neutral technical data for owners, restorers, and technicians. This site is self-funded.
All specifications and compatibility data verified against officialVAUXHALL documentation and EU/UK regulatory texts. Where official data is unavailable, entries are marked “Undisclosed”.
All external links open in new tabs. Please verify current availability of resources.