It is a touring car, with snap-on top and side curtains.

The Four-Seater Tourer has been offered since 1937, on the 4-4 chassis (1937–39) and its postwar incarnation as the 4/4 1948-50, the Plus 4 (1950–68), the 4/4 1600 (1969–1993), 4/4 1800 (1999-2001) and the later Plus 4 (2006-2016) and Roadster (2006-2016).

The body design had few changes from 1937 until the 1990s when the rear seat area was redesigned, primarily to make the seats lower in the car.

In the earlier body the rear passengers sat higher than the front ones, owing to the clearance needed over the rear axle.

The changes in the latest body include longer doors for easier access, improved rear seating, and a top design that is easier to put up and down.