- Magna Series L (1933-34) [MG]
- Magnette Series KN and NA (1934-36) [MG]
- Magnette K3 Supercharged (1933-34) [MG]
- Magnette Series ZA (1953-56) [MG]
- Magnette ZB (1956-58) [MG]
- Magnette III (1959) [MG]
- Majestic (1959) [Daimler]
- Manoir Estate Car (1959) [Renault]
- Marauder
- Mark I A55 (1957-58) [Austin]
- Mark II A55 (1959) [Austin]
- Mark IIA (1953) [Sunbeam-Talbot]
- Mark III (1954-58) [Sunbeam]
- Mark V, 2½ litre (1949-50) [Jaguar]
- Mark V, 3½ litre OHV (1949-50) [Jaguar]
- Mark VI (1946-50) [Bentley]
- Mark VI (1951-52) [Bentley]
- Mark VI (1952) and Mark VII (1953) (1952-53) [Hillman]
- Mark VII Type "M" (1955) [Jaguar]
- Mark VII, 3½ litre (1951-54) [Jaguar]
- Mark VIII (1957-58) [Jaguar]
- Mark VIII OHC (1955) [Hillman]
- Mark IX (1959) [Jaguar]
- Martin
- Mercedes-Benz
- Metropolitan 1500 (1956-59) [Austin]
- Mayflower (12T) (1949-53) [Triumph]
- MG
- MGA (1955-59) [MG]
- MGA 1600 (1959-60) [MG]
- MGA Twin Cam (1959) [MG]
- Midget J1 and J2 (1932-34) [MG]
- Midget Series QA (Supercharged) (1934-35) [MG]
- Midget Series PA (1934-36) [MG]
- Midget Series PB (1936) [MG]
- Midget Series TA (1936-39) [MG]
- Midget Series TB (1939) [MG]
- Midget Series TC (1945-49) [MG]
- Midget Series TD (1950-53) [MG]
- Midget Series TF (1953-55) [MG]
- Minicar (1959) [Bond]
- Mini-Minor (1959) [Morris]
- Minor Series MM (1949-51) [Morris]
- Minor Series II (1952-56) [Morris]
- Minor 1000 (1956-58) [Morris]
- Minx (1936) [Hillman]
- Minx (1937) [Hillman]
- Minx (1938) [Hillman]
- Minx (1939-40) [Hillman]
- Minx (1946-48) [Hillman]
- Minx (1949-51) [Hillman]
- Minx Series I (1956-57) [Hillman]
- Minx Series II (1958) [Hillman]
- Model J [Allard]
- Model J (Ford) [Allard]
- Models K [Allard]
- Models L [Allard]
- Models M [Allard]
- Models P [Allard]
- Model P1 [Allard]
- Model K2 [Allard]
- Model P2 [Allard]
- Model K3 [Allard]
- Model JI, JB (Engine No. 18001 & onwards) 14 HP () [Vauxhall]
- Model JI, JB (Engine No. 2001 to 10454) 14 HP ((except 10412, 10416, 10418, 10420, 10422, 10424, 10426, 10428, 10430, 10432, 10434, 10436, 10438, 10440, 10442, 10444, 10446, 10448, 10450, 10451, 10453)) [Vauxhall]
- Model BX & BXL, 27 HP (1936) [Vauxhall]
- Model G, 25 HP (1937-39) [Vauxhall]
- Model H 10 HP^ (Engine No: H25239 to H38196) () [Vauxhall]
- Model H 10 HP^ (Engine No: H38197 to H51500) () [Vauxhall]
- Model H 10 HP^(Engine No: H51501 to H51977) () [Vauxhall]
- Model HIX, 12 HP (1946-48) [Vauxhall]
- Model HIY 10 HP () [Vauxhall]
- Model HX, 12 HP^(Engine No. HX18863) () [Vauxhall]
- Model HY 10 HP^(Engine No: H52001 onwards) () [Vauxhall]
- Model I, 12 HP^(Engine No. I2001 to I11125) () [Vauxhall]
- Monthéry 1958 and Grand Large (with Super Flash Engine) (1958) [Simca]
- Morgan
- Morris
- Multipla 600 (1957-58) [Fiat]
- Multipla 600 (1959) [Fiat]