| Jensen C-V8 1962-1966 | coupes, grand-tourers, Jensen |
| Jensen FF 1966-1971 | Jensen |
| Jensen Interceptor 1967-1976 | Jensen |
| Jensen SP 1971-1973 | Jensen |
| Jensen-Healey roadster 1972-1976 | Jensen-Healey |
| Jordan F1 models 1991-1999 (191 to 199) | Formula1-racing, Jordan-GP, open-wheels, racing-vehicles |
| Joss JT1 / JP1 2010-current | fh1-roster, fmx360-roster, Joss, supercars |
| JP Zero GT2 2020-current | GT-racing, JP, Lotus, racing-vehicles |
| Kaiser Darrin 1954 | Kaiser |
| Kaiser-Jeep Hurst Jeepster Commando 1966-1973 | Kaiser-Jeep |
| Kalmar 9X9 2024-current | coupes, custom-builds, Porsche, supercars |
| Karma Revero 2018-current | Karma |
| Kepler Motion 2009-current | Kepler |
| KG Mobility Torres 2022-current (Ssangyong Torres) | crossovers-suvs, electric-vehicles, KG-Mobility |