- XJ13 1966 1 prototype – never raced or put into production.
- XJ220 1988 1 concept car – later amended and put into limited production.
- XK180 1998 2 prototypes designed by Keith Helfet – never put into production.
- F-type 2000 1 prototype designed by Keith Helfet (the earlier XJ41 and XJ42 were also dubbed “F-type” but neither went into production). The F-type finally went into production in 2013, based on the X152 design.
more prototypes, concepts and information coming soon…