A range includes at least two different motor vehicles with a structural body having a central underbody part delimiting a lower part of a cab. The central underbody part of the first vehicle receives two seats. The central underbody part of the second vehicle receives four seats. Each central underbody part includes first interface elements allowing mounting thereon of components associated with the function of an internal combustion drive engine mounted on a rear structural part of the structural body which is firmly attached to the central underbody part. Each central underbody part also includes second interface elements allowing mounting thereon of components associated with the function of an electric drive motor to be mounted on the rear structural part. A rear edge of the central underbody part of each vehicle is equipped with a same interface element for connection to the rear structural part of the structural body.