A hydraulic vehicle seat adjustment system for providing positional adjustment of at least two seat adjustments of a vehicle seat. The system comprises a common source of hydraulic fluid, and a control unit which selectively controls and directs hydraulic fluid from the common source of hydraulic fluid to respective first and second actuators to adjust the respective different seat adjustments, for example fore and aft position of the seat, and seat back angle. The system may further also comprise a seat position determining unit connected to the control unit and to a common fluid flow sensor to determine the flow of hydraulic fluid from the common source of hydraulic fluid to the respective first and second actuators and to thereby determine the adjusted position of the respective actuators and so of the respective seat adjustment.