Abstract: A powered road vehicle, namely a passenger car having a permissible maximum laden weight of 3.5 tons or a lorry having a permissible maximum laden weight of 5 tons, comprises: a base vehicle having a load-transferring bottom structure which includes a vehicle body bottom and/or a carriage. The bottom structure is provided with a front axle and at least one rear axle. The base vehicle also includes a vehicle body supported on the bottom structure, the rear part of the vehicle body having side walls. A replaceable rear body mounting upwardly joins the side walls and is supported directly on the bottom structure in a load-transferring manner. The rear body mounting is releasably locked in a main coupler of the base vehicle, and the main coupler is supported directly on the bottom structure in a load-transferring manner. The rear body mounting is also fixed to a separate aligning coupler arranged at a distance from the main coupler.