The Vauxhall X 25 TD is a 2,499 cc, inline‑four turbo‑diesel engine produced between 2017 and 2022. It features dual overhead camshafts (DOHC), 16 valves, and a variable geometry turbocharger (VGT) with intercooler. In standard form it delivered 132 kW (180 PS) at 3,750 rpm and 425 Nm of torque at 1,750 rpm, providing strong towing capability and refined highway performance for mid-size SUVs and crossovers.
Fitted to models such as the Grandland X and Insignia, the X 25 TD was engineered for load-carrying efficiency with low NVH and responsive drivability. Emissions compliance was achieved through high-pressure common-rail injection, cooled exhaust gas recirculation (EGR), diesel oxidation catalyst, and a diesel particulate filter (DPF), ensuring all units met Euro 6d-TEMP standards.
One documented concern is premature failure of the high-pressure fuel pump drive flange, which can cause sudden loss of fuel pressure and engine stalling. This issue, highlighted in Vauxhall Service Bulletin TIS-19-05-21, is attributed to material fatigue under sustained high-load conditions and thermal cycling. From 2020, revised pump drive components with enhanced metallurgy were introduced to improve durability.
All production years 2017–2022 meet Euro 6d-TEMP standards (VCA UK Type Approval #VCA/EMS/9104).
The Vauxhall X 25 TD is a 2,499 cc inline‑four turbo‑diesel engine engineered for mid-size SUVs and executive sedans (2017–2022). It combines DOHC 16-valve architecture with a variable geometry turbocharger to deliver high torque and smooth power delivery. Designed to meet Euro 6d-TEMP emissions standards, it balances towing capability with urban emissions compliance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,499 cc | |
| Fuel type | Diesel | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Turbocharged (VGT) | |
| Bore × stroke | 88.0 mm × 102.5 mm | |
| Power output | 132 kW (180 PS) @ 3,750 rpm | |
| Torque | 425 Nm @ 1,750 rpm | |
| Fuel system | Bosch CP4.2 common-rail (up to 2,000 bar) | |
| Emissions standard | Euro 6d-TEMP | |
| Compression ratio | 15.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Variable geometry turbo (Garrett VNT20) | |
| Timing system | Chain (maintenance-free design) | |
| Oil type | ACEA C3 (SAE 5W‑30) | |
| Dry weight | 186 kg |
The DOHC VGT design provides strong, linear torque ideal for towing and highway cruising but requires strict adherence to 15,000 km or 12-month oil change intervals using low-SAPS ACEA C3 oil to protect the DPF and turbo actuator. The Bosch CP4.2 high-pressure pump is sensitive to fuel lubricity; only EN 590-compliant ultra-low-sulfur diesel should be used. High-pressure pump drive flange fatigue is accelerated under sustained load; post-2020 units include reinforced components per Vauxhall SIB TIS-19-05-21. DPF regeneration requires regular highway driving—vehicles should complete at least one 30-minute run monthly to maintain passive regeneration cycles.
Oil Specs: Requires ACEA C3 (5W-30) low-SAPS oil specification (Vauxhall SIB TIS-19-05-21) to ensure DPF and turbo compatibility.
Emissions: Euro 6d-TEMP certification applies to all model years (VCA Type Approval #VCA/EMS/9104). No earlier emissions variants exist.
Power Ratings: Measured under SAE J1349 standards. Output consistent across all applications (Vauxhall TIS Doc. V17‑4801).
Vauxhall Technical Information System (TIS): Docs V17‑4801, SIB TIS-19-05-21
VCA Type Approval Database (VCA/EMS/9104)
SAE International: J1349 Engine Power Certification Standards
The Vauxhall X 25 TD was used across Vauxhall's Grandland X and Insignia platforms with transverse mounting and no external licensing. This engine received platform-specific adaptations—reinforced engine mounts in the Insignia for NVH control and revised cooling ducts in the Grandland X—and from 2020 the high-pressure pump drive was upgraded to address flange fatigue, creating service part distinctions. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front face of the cylinder block near the timing cover (Vauxhall TIS V17‑4801). The 8th VIN digit indicates engine displacement ('Z' for 2.5L diesel). All X 25 TD units feature a black plastic cam cover with '2.5 CDTI' embossed and dual camshaft pulleys. Critical differentiation from B25DT: X 25 TD uses Bosch EDC17C74 ECU with 24-pin under-hood connector; B25DT is a PSA-sourced variant with different injector layout. Service parts for high-pressure pump drive differ pre/post 2020 due to flange redesign (Vauxhall SIB TIS-19-05-21).
The X 25 TD's primary reliability risk is high-pressure fuel pump drive flange failure, with elevated incidence in sustained high-load use such as motorway towing or mountain driving. Vauxhall internal data from 2021 noted increased stalling complaints on Grandland X vehicles under 80,000 km in mixed-use fleets, while UK DVSA MOT records show DPF-related emissions failures as a recurring cause in mid-size SUVs. Frequent high-load operation and delayed oil changes accelerate mechanical wear, making scheduled maintenance critical.
Analysis derived from Vauxhall technical bulletins (2017–2021) and UK DVSA failure statistics (2019–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about VAUXHALL X-25-TD.
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.
