The X20XEV is an Opel engine. It is a 1998 cc (2.0 L) 16-valve, DOHC in-line four-cylinder engine producing 100 kW (136 PS). It replaced the C20XE engine and was labelled by General Motors as an 'Ecotec'.
The breakdown of the engine name  is as follows:
X - Exhaust emissions level: 94/12/EC, stage 2
20 - 2.0 L
X - Compression ratio - 10.0–11.5:1
E - Mixture system - Injection
V - Specific version - Volume Model
- Vauxhall, "Vauxhall Calibra DTM Special Edition Sales Brochure", 1995.
- Topbuzz, "Engine Codes Explained", Topbuzz Website, 2002 Accessed 9 December 2006