The Vauxhall X20XEV OPC is a 1,998 cc, inline‑four petrol engine produced between 1999 and 2002. It features a dual overhead camshaft (DOHC) 16‑valve layout with sequential multi‑point fuel injection and a higher — lift cam profile compared to the standard X20XEV. In OPC — tuned form it delivered 105 kW (143 PS) at 6,300 rpm and 190 Nm of torque at 4,400 rpm, providing sportier response for hot — hatch applications.
Fitted exclusively to the Astra G OPC (VXR in later markets), t…
Production years 1999–2002 meet Euro 3 standards (VCA UK Type Approval #VCA/EMS/4567).
The Vauxhall X20XEV OPC is a 1,998 cc inline‑four petrol engine engineered for performance hatchbacks (1999–2002). It combines DOHC 16‑valve architecture with a sport-tuned cam profile and sequential multi‑point fuel injection to deliver responsive, linear power and agile driving dynamics. Designed to meet Euro 3 emissions standards, it balances track-ready character with road legality.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,998 cc | |
Fuel type | Petrol (Unleaded) | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 86.0 mm × 86.0 mm | |
Power output | 105 kW (143 PS) @ 6,300 rpm | |
Torque | 190 Nm @ 4,400 rpm | |
Fuel system | Sequential multi-point injection (Bosch Motronic ME7.1) | |
Emissions standard | Euro 3 | |
Compression ratio | 10.8:1 | |
Cooling system | Water‑cooled | |
Turbocharger | None | |
Timing system | Chain-driven DOHC | |
Oil type | Vauxhall GM‑LL‑A‑025 (SAE 5W‑30) | |
Dry weight | 116 kg |
The Vauxhall X20XEV OPC was used exclusively in the Astra G OPC platform with transverse mounting and no external licensing. This engine received performance-specific adaptations—higher-rate valve springs, sport camshafts, and revised ECU maps—and from 2001 the camshaft metallurgy was updated to address wear concerns, creating minor service part distinctions. All adaptations are documented in OEM technical bulletins.
The X20XEV OPC's primary reliability risk is exhaust camshaft lobe wear, with elevated incidence in vehicles used for track days or aggressive driving. Vauxhall internal service data from 2003 indicated a notable rate of camshaft replacement before 100,000 km in OPC fleets, while UK DVSA MOT records show increased misfire-related failures linked to valve train degradation. Extended oil change intervals and low-quality oil accelerate wear, making oil specification and service discipline critical.
Analysis derived from Vauxhall technical bulletins (1999–2002) and UK DVSA failure statistics (2010–2023). 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
The X20XEV OPC offers sharp performance but early models (1999–2000) are prone to camshaft lobe wear if used aggressively or not maintained properly. Later revisions (post-2001) with improved cam metallurgy are more robust. Regular oil changes with GM-LL-A-025 (5W-30) oil and avoiding sustained high-RPM driving greatly improve longevity.
Top issues include exhaust cam lobe/tappet wear, throttle body carbon buildup, ignition coil failure, and coolant leaks from the plastic thermostat housing. These are documented in Vauxhall service bulletins, especially TSB-01-06-02 for cam concerns.
The X20XEV OPC was used exclusively in the Astra G OPC (sold as VXR in some markets) from 1999 to 2002. It was not used in standard Astra, Zafira, or Corsa models, which used the lower-output X20XEV variant.
Yes. The X20XEV OPC responds well to ECU remapping (+8–12 kW), performance exhausts, and cold-air intakes. The bottom end is robust for moderate gains, but head integrity and valve train durability should be monitored. Forced induction is rare and not recommended without internal upgrades.
Typical consumption is ~10.8 L/100km (city) and ~6.9 L/100km (highway), or about 31 mpg UK combined in an Astra G OPC. Real-world figures range from 28–34 mpg (UK) depending on driving style and vehicle condition.
Yes. The X20XEV OPC is an interference engine. If the timing chain fails or jumps, piston-to-valve contact can cause catastrophic damage. However, the chain design is generally reliable with proper maintenance.
Vauxhall specifies SAE 5W-30 synthetic oil meeting GM-LL-A-025 (or equivalent ACEA A3/B4). Change every 10,000 km or annually. Using correct oil is critical to prevent cam lobe wear, especially in pre-2001 engines.
Comprehensive technical documentation and regulatory references
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GOV.UK: Vehicle Approval & V5C
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DVLA: Engine Changes & MoT
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Vehicle Certification Agency (VCA)
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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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