The Lotus Carlton is a version of the Vauxhall Carlton/Opel Omega A saloon upgraded by Lotus in order to be a high performance sports sedan. Like all Lotus vehicles, it was given a type designation—Type 104 in this case.

The Opel Omega is a executive car engineered and manufactured by German automaker Opel between 1986 and 2004. The first generation, the Omega A (1986–1994), superseded the Opel Rekord. It was voted European Car of the Year for 1987, and was available as a saloon or estate. The second generation, the Omega B, was manufactured from 1994 to 2004.