Vehicle with hydrostatic auxiliary propulsion

The vehicle has a vehicle drive with an internal combustion engine (4) for driving a wheel (2) or an axle and a hydrostatic additional drive (10) for driving another wheel or another axle, where the hydrostatic additional drive has an adjustable hydraulic pump (16) and a hydraulic motor (14). The hydraulic pump is driven by the internal combustion engine. The pivoting angle of the hydraulic pump is adjustable under comprehension of a changeable speed offset.