For me it is a sedan (well, actually a "coupé de ville", but we do not have enough categories, so I would put it in the "berline" category, i.e. sedan).
Not because it is not stretched, but because it does not have an extra 3rd lateral window after the door.
http://correlalicorne.free.fr/pages/quoi.html
There is also an official naming from 1930, but these names are different from the link above:
http://perso.wanadoo.fr/desa.dom/fr/modeles/carro-fr.htm
(page also include UK ans US names, click on "anglaise" and "américaine" links)