Method, system and vehicle for improving driving efficiency

A system for improving driving efficiency for a first host vehicle with at least one propulsion unit and at least one energy storage unit, wherein the system comprises:

• sensors arranged to determine a first set of parameters regarding the first host vehicle which affects driving efficiency before a driving session with the first host vehicle is initiated and arranged to provide input indicative thereof to a user interface or an autonomous or semi-autonomous driving system of the first host vehicle, and arranged to monitor a second set of parameters which affects driving efficiency during the driving session of the first host vehicle;
• and
• at least one processing unit, arranged to receive and compare parameters of the first and second set of parameters from the sensors with corresponding parameters received from at least one second host vehicle, and in response to identified differences between parameters of the first and second host vehicle, arranged to provide input indicative thereof to the user interface or an autonomous or semi-autonomous driving system of the first host vehicle.