An automotive accelerator system comprising: • an accelerator member movable in response to driver operation, • a position sensor associated with the accelerator member to output a position signal indicating an operation degree of the accelerator member, and • signal processing means configured to receive the position signal generated by the position sensor and to generate a command for a motor vehicle engine based on the position signal and a characteristic curve of the accelerator system that defines the command for the motor vehicle engine as a function of the position signal; wherein the signal processing means are further configured to: • receive a signal indicating a current motor vehicle speed, • dynamically adapt the accelerator system characteristic curve based on the current motor vehicle speed; characterized in that the signal processing means are further configured to: • receive a signal indicating a target motor vehicle speed, • determining lower, intermediate and upper motor vehicle speed ranges based on the target motor vehicle speed; and • dynamically adapting the accelerator system characteristic curve based on the current motor vehicle speed and the lower, intermediate and upper motor vehicle speed ranges such that: - for current motor vehicle speeds within the lower motor vehicle speed range, the command is directly proportional to the position signal, via a first proportionality coefficient; - for current motor vehicle speeds within the upper motor vehicle speed range, the command is substantially invariant as the position signal varies; and - for current motor vehicle speeds within the intermediate motor vehicle speed range, the command is directly proportional to the position signal, via a second proportionality coefficient lower than the first proportionality coefficient. • an accelerator member movable in response to driver operation, • a position sensor associated with the accelerator member to output a position signal indicating an operation degree of the accelerator member, and • signal processing means configured to receive the position signal generated by the position sensor and to generate a command for a motor vehicle engine based on the position signal and a characteristic curve of the accelerator system that defines the command for the motor vehicle engine as a function of the position signal; • receive a signal indicating a current motor vehicle speed, • dynamically adapt the accelerator system characteristic curve based on the current motor vehicle speed; • receive a signal indicating a target motor vehicle speed, • determining lower, intermediate and upper motor vehicle speed ranges based on the target motor vehicle speed; and • dynamically adapting the accelerator system characteristic curve based on the current motor vehicle speed and the lower, intermediate and upper motor vehicle speed ranges such that: - for current motor vehicle speeds within the lower motor vehicle speed range, the command is directly proportional to the position signal, via a first proportionality coefficient; - for current motor vehicle speeds within the upper motor vehicle speed range, the command is substantially invariant as the position signal varies; and - for current motor vehicle speeds within the intermediate motor vehicle speed range, the command is directly proportional to the position signal, via a second proportionality coefficient lower than the first proportionality coefficient. - for current motor vehicle speeds within the lower motor vehicle speed range, the command is directly proportional to the position signal, via a first proportionality coefficient; - for current motor vehicle speeds within the upper motor vehicle speed range, the command is substantially invariant as the position signal varies; and - for current motor vehicle speeds within the intermediate motor vehicle speed range, the command is directly proportional to the position signal, via a second proportionality coefficient lower than the first proportionality coefficient.