An electric vehicle may include at least one motor configured to transmit a drive output. A motor-generator unit may be configured to supply the at least one motor with electrical power. The motor-generator unit may include an internal combustion piston engine, which may include a crankshaft configured to rotation about an axis of rotation, and an electrical generator that may be drive connected to the piston engine. A control device may be in communication with the motor-generator unit. The control device may be configured to vary a generator torque of the electrical generator during a rotation cycle of the crankshaft in response to a crankshaft angle.