Below is a list of all of the known prototypes & pre-production cars. Click on a hyperlink to view a photograph.
If you know of a Lotus Carlton in your area or you spot one email me please.
| Build No. | Type | Registration Year | Notes |
| Prototype | Lotus Omega | 1989 | Converted silver Omega 3000, probably scrapped |
| Prototype | Lotus Omega | 1989 | Converted silver Omega 3000, probably scrapped |
| Prototype | Lotus Omega | 1989 | Converted silver Omega 3000, probably scrapped |
| Show Car | Lotus Omega | 1989 | Fate unknown, probably scrapped |
| Show Car | Lotus Carlton | 1989 | Fate unknown, probably scrapped |
| V1 | Lotus Omega | 1989/90 | Scrapped |
| V2 | Lotus Omega | 1989/90 | Scrapped |
| V3 | Lotus Omega | 1989/90 | Scrapped |
| V4 | Lotus Omega | 1989/90 | Scrapped |
| V5 | Lotus Omega | 1989/90 | Scrapped |
| V6 | Lotus Omega | 1989/90 | Scrapped |
| V7 | Lotus Omega | 1989/90 | Scrapped |
| V8 | Lotus Omega | 1989/90 | Scrapped |
| V9 | Lotus Omega | 1989/90 | Pre-production car, probably scrapped, badged as Vauxhall Lotus Carlton |
| PP1 | Lotus Omega | 1989/90 | Scrapped |
| PP2 | Lotus Carlton | 1989/90 | Pre-production car, probably scrapped |
| PP3 | Lotus Omega | 1989/90 | Scrapped |
| PP4 | Lotus Omega | 1989/90 | Pre-production car, probably scrapped |
| PP5 | Lotus Omega | 1989/90 | Scrapped |
| PP6 | Lotus Omega | 1989/90 | Scrapped |
| PP7 | Lotus Omega | 1989/90 | Scrapped |
| PP8 | Lotus Carlton | 1990 | Pre-production car, still running |
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