An electric-propulsion vehicle includes a motor-driven front axle assembly (10); and a motor-driven rear axle assembly (20); wherein the above assemblies each include a supporting frame (110), two wheel-suspension units (30), an electric motor (40) for driving the wheels in rotation, a control unit (45) for controlling the aforesaid motor, a differential transmission unit (55) with one or more gear ratios, and a steering device (50) for regulating the angular position of the wheel supports of the aforesaid suspension units with respect to the aforesaid frame; the motor, the suspension units, and the steering device being mounted on the aforesaid supporting frame. The two axle assemblies have altogether corresponding configurations, and constitute in themselves independent modules, already pre-assembled in their operating configuration.