Motor vehicle group of a vehicle type, wherein - the group comprises motor vehicles with three different drive concepts, - the three drive concepts comprise an internal combustion engine ("combustion drive") or an electric motor ("electric drive") or a combination of an internal combustion engine and at least one electric motor ("hybrid drive"), wherein - a uniform front end assembly (V01') with front longitudinal members is provided for all drive concepts, - two floor panel assemblies (B1a, B1b) are provided, the height of which is identical in the installation position in the motor vehicle, - the body-in-white structures of the "electric drive" motor vehicles have the first floor panel assembly (B1a), - the body-in-white structures of the "internal combustion engine" motor vehicles and the "hybrid drive" motor vehicles have the second floor panel assembly (B1b), - the motor vehicles with "electric drive" and the motor vehicles with "hybrid drive" have at least one battery (62; 60a) arranged over a large area under the floor panel assembly (B1a, B1b), - both floor panel assemblies (B1a, B1b) are of frame-like construction, comprising two side longitudinal members, a front cross member connecting the front end portions of the side longitudinal members, a rear cross member connecting the rear end regions of the side longitudinal members, and at least one middle cross member connecting the two side longitudinal members, which middle cross member is arranged between the front and rear cross members (QT1 and QT2), so as to form at least two frame portions delimited by the side longitudinal members and the cross members (QT1, QT2, QT3), wherein - the front cross member and its connecting region with the front longitudinal members are formed in such a way that forces are introduced from the front longitudinal members into the front cross member without further extension of the connecting region on the underside of the floor panel assemblies (B1a, B1b), characterized in that - in the first floor panel assembly (B1a), in the installed position in the motor vehicle, all frame portions are stiffened by the at least one battery, whereas - in the second floor panel assembly (B1b), at least one frame portion is provided with a stiffening add-on component. - the group comprises motor vehicles with three different drive concepts, - the three drive concepts comprise an internal combustion engine ("combustion drive") or an electric motor ("electric drive") or a combination of an internal combustion engine and at least one electric motor ("hybrid drive"), wherein - a uniform front end assembly (V01') with front longitudinal members is provided for all drive concepts, - two floor panel assemblies (B1a, B1b) are provided, the height of which is identical in the installation position in the motor vehicle, - the body-in-white structures of the "electric drive" motor vehicles have the first floor panel assembly (B1a), - the body-in-white structures of the "internal combustion engine" motor vehicles and the "hybrid drive" motor vehicles have the second floor panel assembly (B1b), - the motor vehicles with "electric drive" and the motor vehicles with "hybrid drive" have at least one battery (62; 60a) arranged over a large area under the floor panel assembly (B1a, B1b), - both floor panel assemblies (B1a, B1b) are of frame-like construction, comprising two side longitudinal members, a front cross member connecting the front end portions of the side longitudinal members, a rear cross member connecting the rear end regions of the side longitudinal members, and at least one middle cross member connecting the two side longitudinal members, which middle cross member is arranged between the front and rear cross members (QT1 and QT2), so as to form at least two frame portions delimited by the side longitudinal members and the cross members (QT1, QT2, QT3), wherein - the front cross member and its connecting region with the front longitudinal members are formed in such a way that forces are introduced from the front longitudinal members into the front cross member without further extension of the connecting region on the underside of the floor panel assemblies (B1a, B1b), characterized in that - in the first floor panel assembly (B1a), in the installed position in the motor vehicle, all frame portions are stiffened by the at least one battery, whereas - in the second floor panel assembly (B1b), at least one frame portion is provided with a stiffening add-on component.