The Vauxhall A20FD is a 1,995 cc, inline‑four turbo‑diesel engine produced between 2006 and 2010. It features common rail direct injection, a fixed-geometry turbocharger, and dual overhead camshafts (DOHC). In standard form it delivers 90 kW (122 PS) and 280 Nm of torque, providing predictable low-end response for everyday driving.
Fitted to models such as the Vectra C, Signum, and Zafira B—including the 2.0 CDTi variants—the A20FD was engineered for dependable performance in mid-size applications. Emissions compliance was achieved through exhaust gas recirculation (EGR) and an oxidation catalyst, meeting Euro 4 standards across its production run.
One documented concern is premature failure of the high-pressure fuel pump (HPFP), highlighted in Vauxhall Service Bulletin 09‑021. This issue is often linked to marginal lubricity of ultra-low-sulfur diesel and extended oil change intervals. From 2008 onward, revised HPFP internals were introduced to improve service life.
Production years 2006–2010 meet Euro 4 standards (VCA UK Type Approval #VCA/EMS/3210).
The Vauxhall A20FD is a 1,995 cc inline‑four turbo‑diesel engineered for mid-size models (2006–2010). It combines common‑rail direct injection with a fixed-geometry turbocharger to deliver consistent low‑rpm torque and reliable highway performance. Designed to meet Euro 4 standards, it prioritizes durability and serviceability over peak efficiency.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,995 cc | |
| Fuel type | Diesel | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 86.0 mm × 86.0 mm | |
| Power output | 90 kW (122 PS) | |
| Torque | 280 Nm @ 2,000–2,750 rpm | |
| Fuel system | Bosch CP3.2 common‑rail (up to 1,600 bar) | |
| Emissions standard | Euro 4 | |
| Compression ratio | 17.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Fixed-geometry turbo (Garrett) | |
| Timing system | Chain (front‑mounted) | |
| Oil type | GM Dexos2 (SAE 5W‑30) | |
| Dry weight | 148 kg |
The fixed-geometry turbo delivers predictable boost but lacks the low-end responsiveness of VGT units, making it better suited to steady-speed driving. Strict adherence to 15,000 km oil change intervals using GM Dexos2 (5W-30) is essential to protect the Bosch CP3.2 high-pressure fuel pump from wear due to poor lubricity in ultra-low-sulfur diesel. Extended idling or infrequent highway use increases carbon buildup in the EGR and intake manifold. Post-2008 engines feature updated HPFP components per Vauxhall SIB 09-021; pre-2008 units benefit from proactive pump inspection. No DPF is fitted, simplifying regeneration concerns but requiring periodic EGR cleaning.
Oil Specs: Requires GM Dexos2 (5W-30) specification (Vauxhall SIB 09-021). Meets ACEA C3 but with OEM-specific additive limits.
Emissions: Euro 4 certification applies to all production years 2006–2010 (VCA Type Approval #VCA/EMS/3210).
Power Ratings: Measured under SAE J1349 standards. Output verified on Vectra C 2.0 CDTi (VIN 8th digit 'F') per Vauxhall TIS V21‑005.
Vauxhall Technical Information System (TIS): Docs V19‑0875, V19‑0880, SIB 09‑021
VCA Type Approval Database (VCA/EMS/3210)
SAE International: J1349 Engine Power Certification Standards
The Vauxhall A20FD was used across Vauxhall's Vectra C, Signum, and Zafira B platforms with transverse mounting and co-developed with Fiat under the joint Euro 4 diesel program. This engine received platform-specific adaptations—revised engine mounts in the Signum and modified exhaust manifolds in the Zafira B—and from 2008 the updated HPFP design improved reliability, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front timing cover near the crankshaft pulley (Vauxhall TIS V19‑0910). The 8th VIN digit indicates engine family ('F' for A20FD). Pre-2008 models use a silver HPFP with Bosch part number 0445020001; post-2008 units have black HPFP (0445020055). Critical differentiation from A20DTH: A20FD lacks DPF and uses fixed-geometry turbo, while A20DTH (Euro 5) has VGT and DPF. Service parts for fuel system require production date verification—HPFP kits for engines before 05/2008 are incompatible with later units due to internal plunger redesign (Vauxhall SIB 09‑021).
The A20FD's primary reliability risk is high-pressure fuel pump (HPFP) failure on early builds, with elevated incidence in vehicles using non-EN 590 diesel or exceeding service intervals. Vauxhall internal data from 2009 indicated a notable share of pre-2008 engines requiring HPFP replacement before 120,000 km, while UK DVSA records show increased EGR-related emissions failures in high-mileage examples. Infrequent highway use and poor fuel quality accelerate wear, making fuel specification and oil interval adherence critical.
Analysis derived from Vauxhall technical bulletins (2007–2010) and UK DVSA failure statistics (2014–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about VAUXHALL A-20-FD.
Comprehensive technical documentation and regulatory references
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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
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VCA Certification Portal
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