The Vauxhall C18XE is a 1,796 cc, inline‑four naturally aspirated petrol engine produced between 1995 and 2000. It features a DOHC 16‑valve layout with sequential multi — point fuel injection and an all — aluminium construction. In standard form it delivered 92 kW (125 PS) and 168 Nm of torque, offering a balance of performance and refinement for compact executive applications.
Fitted primarily to the Astra F GSi, Vectra B, and Omega B, the C18XE was engineered for sporty ye…
Production years 1995–2000 meet Euro 2 standards .
The Vauxhall C18XE is a 1,796 cc inline‑four naturally aspirated petrol engine engineered for sporty compact and mid-size models (1995–2000). It combines DOHC 16-valve architecture with sequential fuel injection to deliver responsive performance and smooth operation. Designed to meet Euro 2 emissions standards, it balances driver engagement with acceptable fuel economy for its era.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,796 cc | |
Fuel type | Petrol (RON 95 min) | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 80.5 mm × 88.2 mm | |
Power output | 92 kW (125 PS) @ 5,800 rpm | |
Torque | 168 Nm @ 3,800 rpm | |
Fuel system | Bosch Motronic 2.8 sequential multi-point injection | |
Emissions standard | Euro 2 | |
Compression ratio | 10.5:1 | |
Cooling system | Water‑cooled | |
Turbocharger | None | |
Timing system | Belt (front‑mounted) | |
Oil type | API SH/CF (SAE 10W‑40) | |
Dry weight | 115 kg |
The Vauxhall C18XE was used across Vauxhall's Astra F, Vectra B, and Omega B platforms with transverse or longitudinal mounting and no external licensing. This engine received platform-specific adaptations—revised engine mounts in the Vectra and modified intake manifolds in the Astra GSi—and from 1998 the facelifted Vectra B models adopted updated ECU calibrations, creating minor interchange limits. All adaptations are documented in OEM technical bulletins.
Engine Finders UK Ltd, which operates EngineCode.uk, can pass your enquiry to engine suppliers in the UK. The service is for vehicles in the United Kingdom, with UK delivery or fitting. This is a commercially connected service, and sending an enquiry does not confirm diagnosis or compatibility.
Diagnostic reminder: If a technician has recommended replacing the engine, you can send an enquiry to engine suppliers in the UK. Confirm the diagnosis first: an engine-code record does not diagnose a fault.
Field reports and technical service bulletins highlight component wear patterns under high-load operation. Adherence to manufacturer service intervals and approved fluid specifications is critical for long-term reliability.
Analysis derived from manufacturer technical service bulletins and industry workshop records. 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 C18XE offers strong performance and refinement for its era, but early models (1995–1997) had head gasket reliability concerns. Later units improved gasket materials, so well-maintained examples can be robust. Regular cooling system maintenance and timely timing belt changes greatly aid longevity.
The biggest issues are head gasket failure, timing belt neglect, individual ignition coil faults, and throttle body carbon buildup. These are documented in Vauxhall service bulletins TIS 97‑034 and 96‑028. The engine itself is capable when basic maintenance is followed.
This 1.8L 16V petrol was used in the Astra F GSi (1995–1998), Vectra B (1995–2000), and Omega B (1995–1999) as the base 1.8 16V variant. It was not used in later models or licensed to other manufacturers, and was replaced by the X18XE with updated engine management.
Aftermarket ECU tuning is common on the C-18-XE platform, but increasing boost or altering engine parameters accelerates component wear, impacts emissions compliance, and may void vehicle warranties. Any modifications should be evaluated carefully by a qualified specialist.
In a Vectra B 1.8 16V, typical consumption is ~9.8 L/100km (city) and ~6.2 L/100km (highway), or about 29 mpg UK combined. Real-world economy varies with driving style—expect 26–32 mpg UK on mixed roads for a healthy, unmodified engine.
Yes. The C18XE is an interference engine. If the timing belt fails, pistons can contact open valves, causing catastrophic internal damage. Belt replacement every 60,000 km or 4 years is critical to prevent this.
Vauxhall specifies API SH/CF (10W‑40) semi-synthetic oil. Modern low-SAPS or Dexos oils are not required and may not provide optimal protection for older seals and bearings. Change oil every 10,000 km or 12 months.
Comprehensive technical documentation and regulatory references
EngineCode.uk is operated by Engine Finders UK Ltd. It provides engine-reference information and an optional commercial enquiry service. It is not an official manufacturer website. Check the record's sources and confirm vehicle-specific details before relying on it for parts, repairs or replacement.
Our editorial standard prioritises relevant manufacturer documentation and official regulatory sources. The sources and verification status for a record should be checked alongside the data.
A statement is not verified merely because a source is listed. Where supporting evidence is missing or conflicting, the record should identify that limitation. Please report unsupported or inconsistent information.
Transparency in gaps
A missing or unverified value does not mean the manufacturer has withheld it. We distinguish information not yet verified, information not available to us, and information explicitly not disclosed by the source.
Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
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.
Records are subject to review and correction. Source links, dates and verification notes should be read with the technical information. Our Editorial and Sourcing Policy explains our standards and review process.
Found an error or missing source? Report a problem with this page. Include the field or statement concerned and a supporting source if available. You can also email corrections@enginecode.uk.
Copyright and permissions
Images and other material may be protected by copyright. Attribution does not by itself grant permission to reuse material. If you believe material on this site infringes your rights, contact copyrights@enginecode.uk with the page URL and details of your claim. We will review the material and take appropriate action.
Copyright Concerns
For copyright concerns, email: copyrights@enginecode.uk
Our Privacy Policy explains how Engine Finders UK Ltd uses information from visits, vehicle lookups, enquiries and messages. Our Cookie Policy explains cookies and similar technologies and how to change your choices.
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.
Ownership and commercial services
EngineCode.uk is owned and operated by Engine Finders UK Ltd. Alongside our reference content, we offer an optional replacement-engine enquiry service through Engine Finders and may identify relevant services provided by businesses connected with us. These commercial connections are disclosed. Using an enquiry service is not required to read our reference content.
Engine Finders UK Ltd operates this website. Our optional enquiry service has a commercial purpose. Our Ownership and Commercial Disclosure explains the relationship between the reference website and that service. Participating suppliers pay a fee or subscription to participate on the network and receive quote requests.
Use this record as a starting point for identification. Specifications and vehicle applications may contain errors or omissions. Confirm the exact engine variant and compatibility using vehicle-specific documentation and a qualified supplier or technician.
All external links open in new tabs. Please verify current availability of resources.