Bertone Studios designed the car, and Citroen offered it in two shapes: sedan and station wagon. The latter was highly appreciated by those who needed big trunks and comfortable rides.
With a wedged-shape look, the XM featured a narrow front end with slim headlights and almost no visible grille. The extended roof was ended into a sloped tailgate. A long, sculptured line crossed the vehicle from headlights to taillights, and the carmaker installed the door handles in that. At the back, the step over the rear door panels made a connection to the trunk area and rear quarter panels.
Inside, the designer kept the same theme of angular shapes. Even the steering wheel featured a squared center. The XM Wagon offered room for up to five adults with more than decent legroom and headroom. Its trunk offered up 719 liters (25.4 cu-ft), with the rear bench in normal position.
Under the hood, Citroen offered a choice of three gasoline and two diesel engines. The carmaker paired them with either a five-speed manual or an automatic gearbox.