This thesis is centerd around the development of a 1.6L Diesel engine model in Simulink for hardware in the loop purposes. In the automotive industry, the need for a simpler way of testing with respect to a complete HIL structure is arising, mainly for cost-efficiency reasons. In said scenario, the need for an engine model that is parametric and can be accesed to evaluate various measurements is a key point. Thus, the focus for the development has been given to the parametric nature of the model so that it is flexible and adaptable to different motorizations, and the fact that its performancies are mainly focused on the behavioural side, but still respecting at a high degree the system’s physics.