| McMurtry Speirling 2021-current | electric-vehicles, hypercars, McMurtry |
| McRae Enduro 4x4 2006-2007 | McRae, racing-vehicles |
| McRae R4 (rally racing) 2007 | McRae, racing-vehicles, rally-racing |
| MCW Metrocab 1987-2006 | MCW, Reliant, taxi-cabs |
| MD Rallye Sport Optimus 2010-current | MD-Rallye-Sport |
| Mega Monte Carlo 1990-1999 | coupes, Lamborghini, Mercedes, open-top-cars, supercars |
| Mega Track 1992-1995 | coupes, Mega, Offroad, sports-cars |
| MegaRexx Ford F-Series Super Duty 2023-current (F-250 to F-450) | custom-builds, Ford, Offroad, pickup-trucks |
| Melkus RS 1000 1969-1979 | coupes, Melkus, sports-cars |
| Melkus RS 2000 2009-2012 | Melkus |