The objective of this paper is to propose a model to assist in the acquisition of vehicle fleets. The proposal is based on the use of vehicle characteristics such as pollutant emission levels, energy consumption, vehicle category, transmission, and motorization. Idealizing an evaluative process based on multi-criteria analysis, to help decision-making when acquiring vehicles considering several criteria. With the purpose of generating lists of vehicles that support the consumer's choice, regarding the decarbonization of fleets, contributing to the reduction of impacts resulting from gas emissions in large cities.