In this paper, we consider different configurations – currently manufactured – of a four cylinders, gasoline 1.5L engine. In the following, in place of the real names of car models we simply use the tags “Car A” and “Car B”. The engine has been installed on Car A since 2011, and complies with the Euro 2 and Euro 4 standard. Two years later, Car B was updated and the same engine was adapted to this platform, proposed both in the Euro 2 and the Euro 5 versions. The employed sensors are the same in all the cases; conversely, there are some differences in the sets of actuators: the EGR valve is not used onto the Euro 2 vehicles, and other components, including the ECU, change with the platform. Finally, different software have been developed for these configurations. In Table 1, a subset of sensors and actuators is reported: different letters represent different components.