Abstract: A motor-vehicle driving style estimating system (100) of a motor-vehicle, comprising a measuring apparatus (1) of a kinematic signal representative of a motor-vehicle motion quantity trend (v(t)). The system is characterized in that it further comprises a kinematic signal low-pass filtering module (8) configured to provide a corresponding reference filtered signal associated with a reference trend of said quantity (vF(t)). Furthermore, the system comprises a kinematic signal and reference filtered signal processing module (2) configured to provide an indication of the driving style depending on a comparison of the motor-vehicle motion trend with the reference trend.