The Microscopic Free-flow aCceleration (MFC) Model accurately and consistently captures the acceleration dynamics of vehicles based on engine parameters, also considering the environmental conditions and driver behavior. This allows for a more accurate calculation of emissions and fuel consumption which are statistics influenced by vehicle dynamics. While the MFC introduces complexity to the calculation, there is minimal impact on the run time of the simulation because it uses pre-built gear and acceleration profiles for the different Euro Car Segments to determine the acceleration of a vehicle. The model includes petrol, diesel and electric engines. In the case of combustion engines, first, the gear is determined from the vehicle’s speed and the driving style. Second, the engine’s acceleration is taken from the acceleration curve based on the gear and speed. Lastly, the vehicle acceleration is calculated, considering the resistances such as the rolling and drag resistance. In the case of electric engines, there is only one speed-acceleration curve to which the resistances are also applied. Moreover, for all engine types, a driving style factor is applied to calculate the current acceleration.