Hydraulic system comprising - a first group of motors, comprising at least one hydraulic motor, - a second group of motors, comprising at least one hydraulic motor, - a power supply unit, suitable for delivering a pressure and supplying power in parallel to the first group of motors and to the second group of motors, so as to define a power supply and a discharge of fluid for each of said first group of motors and second group of motors, said system comprising a control unit suitable for forming a variable restriction on the intake of one of said first group of motors and said second group of motors, and a variable restriction on the discharge of the other of said first group of motors and said second group of motors, said system being characterized in that same comprises: a sensor (201, 202) suitable for measuring an operating speed of one of the hydraulic motors of one of the said first group of motors and second group of motors, a controller suitable for determining, as a function of the measurement made by said sensor (201, 202), the operating speed of said hydraulic motor of said first group of motors and said second group of motors, and to control the regulation unit as a function of a setpoint so as to control the operating speed of the hydraulic motors of the first group of motors and the operating speed of the hydraulic motors of the second group of motors. - a first group of motors, comprising at least one hydraulic motor, - a second group of motors, comprising at least one hydraulic motor, - a power supply unit, suitable for delivering a pressure and supplying power in parallel to the first group of motors and to the second group of motors, so as to define a power supply and a discharge of fluid for each of said first group of motors and second group of motors, said system comprising a control unit suitable for forming a variable restriction on the intake of one of said first group of motors and said second group of motors, and a variable restriction on the discharge of the other of said first group of motors and said second group of motors, said system being characterized in that same comprises: a sensor (201, 202) suitable for measuring an operating speed of one of the hydraulic motors of one of the said first group of motors and second group of motors, a controller suitable for determining, as a function of the measurement made by said sensor (201, 202), the operating speed of said hydraulic motor of said first group of motors and said second group of motors, and to control the regulation unit as a function of a setpoint so as to control the operating speed of the hydraulic motors of the first group of motors and the operating speed of the hydraulic motors of the second group of motors. a sensor (201, 202) suitable for measuring an operating speed of one of the hydraulic motors of one of the said first group of motors and second group of motors, a controller suitable for determining, as a function of the measurement made by said sensor (201, 202), the operating speed of said hydraulic motor of said first group of motors and said second group of motors, and to control the regulation unit as a function of a setpoint so as to control the operating speed of the hydraulic motors of the first group of motors and the operating speed of the hydraulic motors of the second group of motors.