The purpose of this thesis is to create a mathematical model that correlates cost of vehicle’s production and Global Warming Potential (GWP). The first step consists in studying vehicle dynamics in order to understand which are the main parameters that impact on CO2 emissions during the vehicle Life-Cycle. Once individuated, for each parameter a curve Cost-GWP has been interpolated and then approximated to a function starting from literature data and a pre-existing CO2 assessment model. Once a specific mathematical function for every parameter has been obtained, an optimization problem has been set and resolved in order to find what combinations of points on the curves allow to achieve the minimum level of GWP possible for a single vehicle produced.