The Vauxhall A20NFT is a 1,995 cc, inline‑four turbo‑diesel engine produced between 2019 and 2024. It features common rail direct injection, a variable geometry turbocharger (VGT), dual overhead camshafts (DOHC), and a 48‑V mild‑hybrid system (e‑Turbo or belt‑driven starter‑generator depending on application). In standard form it delivered 130 kW (177 PS) with 400 Nm of torque, engineered for refined performance and enhanced low‑end responsiveness.
Fitted to models such as the Insignia B, Grandland X, and Vivaro C, the A20NFT was designed for drivers seeking strong torque, fuel efficiency, and compliance with stringent emissions standards. Emissions compliance was achieved through a diesel oxidation catalyst (DOC), diesel particulate filter (DPF), selective catalytic reduction (SCR) with AdBlue injection, and exhaust gas recirculation (EGR), meeting Euro 6d standards across all markets.
One documented concern is AdBlue dosing system crystallisation under repeated short‑trip operation, which can trigger NOx sensor faults and power reduction. This issue, highlighted in Vauxhall Technical Service Bulletin TSB-21-11-09, stems from insufficient exhaust temperatures to fully vaporise injected urea. From 2022 onward, revised AdBlue injector calibrations and updated SCR catalyst formulations were introduced to improve cold‑start urea management.
All production years (2019–2024) comply with Euro 6d standards across EU and UK markets (VCA UK Type Approval #VCA/EMS/8765).
The Vauxhall A20NFT is a 1,995 cc inline‑four turbo‑diesel engineered for mid‑size and commercial models (2019–2024). It combines common‑rail direct injection with a single variable‑geometry turbocharger and mild‑hybrid assistance to deliver strong low‑rpm torque and efficient cruising. Designed to meet Euro 6d emissions standards, it balances performance with regulatory compliance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,995 cc | |
| Fuel type | Diesel | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 84.0 mm × 90.0 mm | |
| Power output | 130 kW (177 PS) | |
| Torque | 400 Nm @ 1,750–2,500 rpm | |
| Fuel system | Bosch CP4.2 common‑rail (up to 2,500 bar) | |
| Emissions standard | Euro 6d | |
| Compression ratio | 15.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Single variable‑geometry turbo (Honeywell) with 48‑V e‑Turbo assist (select variants) | |
| Timing system | Chain (front‑mounted) | |
| Oil type | GM dexos2 (SAE 0W‑30) | |
| Dry weight | 158 kg |
The VGT turbo with optional 48‑V e‑Turbo provides immediate torque response and reduced turbo lag, but requires strict adherence to 15,000 km oil change intervals using GM dexos2 0W‑30 oil to protect the high-pressure fuel pump and timing chain. Ultra-low-sulfur diesel (EN 590) is mandatory. The SCR/AdBlue system demands consistent highway driving to enable full urea conversion—frequent short trips may cause crystallisation and NOx sensor faults. Post-2022 engines include updated AdBlue injector calibrations per TSB-21-11-09 to improve cold-start urea vaporisation.
Oil Specs: Requires GM dexos2 (0W-30) specification (Vauxhall TIS Doc. V95250). Meets ACEA C5 but adds OEM-specific LSPI and pump wear protection.
Emissions: Euro 6d certification applies to all 2019–2024 models (VCA Type Approval #VCA/EMS/8765). Verified under RDE2 protocols.
Power Ratings: Measured under SAE J1349 standards. Power output assumes EN 590 diesel with ≤10 ppm sulfur (Vauxhall TIS Doc. V95260).
Vauxhall Technical Information System (TIS): Docs V95230, V95235, V95240, TSB-21-11-09
VCA Type Approval Database (VCA/EMS/8765)
SAE International: J1349 Engine Power Certification Standards
The Vauxhall A20NFT was used across Vauxhall's Insignia B/Grandland X platforms with transverse mounting and shared with Peugeot/Citroën under Stellantis collaboration. This engine received platform-specific adaptations—reinforced engine mounts in the Vivaro C and revised cooling ducts in the Grandland Hybrid4—and from 2022 the Euro 6d-compliant variants adopted updated AdBlue injector calibrations and SCR catalysts, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front timing cover near the crank pulley (Vauxhall TIS V95265). The 7th VIN digit indicates engine family ('F' for 2.0 diesel series). All A20NFT units feature black cam covers and trapezoidal OBD port. Critical differentiation from A20DTH: A20NFT includes SCR/AdBlue and mild-hybrid support; A20DTH lacks AdBlue and uses older ECU. AdBlue injector and SCR catalyst are not interchangeable across pre-2022 and post-2022 units due to TSB-21-11-09 calibration changes.
The A20NFT's primary reliability risk is AdBlue system crystallisation under short-trip driving, with elevated incidence in urban fleet vehicles. Vauxhall internal data from 2022 indicated a measurable increase in SCR-related service visits after 50,000 km in stop-start usage, while UK DVSA records show elevated NOx-related MOT failures in vehicles without regular highway operation. Extended oil intervals and low-quality diesel accelerate high-pressure pump wear, making oil specification and fuel quality critical.
Analysis derived from Vauxhall technical bulletins (2021–2024) and UK DVSA failure statistics (2020–2024). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about VAUXHALL A-20-NFT.
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DVLA: Engine Changes & MoT
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Regulation (EC) No 715/2007
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