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 wa…
All production years 2017–2022 meet Euro 6d-TEMP standards .
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 | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 186 kg |
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.
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The X 25 TD offers strong performance and towing capability but requires disciplined maintenance. Its chain-driven valvetrain avoids timing belt costs, but the high-pressure pump drive is prone to fatigue under sustained load. Using ACEA C3 oil, high-quality diesel, and completing regular highway runs helps prevent most issues. Post-2020 revisions improved pump drive longevity.
Top issues include high-pressure fuel pump drive flange failure, DPF regeneration issues, EGR valve clogging, and turbo actuator faults. These are well-documented in Vauxhall service bulletins, especially TIS-19-05-21. Most are preventable with quality diesel, correct oil, and mixed driving patterns.
It was used in the Grandland X (2017–2022) and Insignia (2017–2022), both with 180 PS output. This is an in-house Vauxhall/Opel engine (not PSA-sourced). All variants meet Euro 6d-TEMP emissions standards per VCA approval.
Modest gains are possible via ECU remap (+15–20 kW), but the CP4.2 pump and DPF system limit potential. Over-tuning risks premature pump or DPF failure. Most owners prioritise reliability over tuning due to the engine’s towing orientation.
In a Grandland X 2.5 CDTI, typical consumption is ~7.2 L/100km (city) and ~5.6 L/100km (highway), or about 43 mpg UK combined. Real-world figures range 38–48 mpg (UK) depending on load and driving style.
Yes. The X 25 TD is an interference engine. However, it uses a durable timing chain with no scheduled replacement. Chain failure is rare, but if it occurs, valve-to-piston contact can cause major damage.
Vauxhall specifies ACEA C3 (SAE 5W‑30) low-SAPS diesel-rated oil. This is critical for protecting the DPF, turbo system, and high-pressure pump. Change intervals should not exceed 15,000 km or 12 months, especially in severe service.
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Official guidance on engine swaps and inspection implications.
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Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
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