I don't actually know the answer but in view of the number of 4+ seater models since the war (Y Saloon, Y Tourer, Magnette ZA,ZB, Mk III and Mark IV, 1100, 1300, Metro, Maestro, Montego, ZR,ZS,ZT, ZT-T, MG6 and soon the MG3) I would assume the answer to be 4 seaters