CFD simulations for automotive bluff bodies often rely on simplified models for both the vehicle and the computational domain. Current models maintains simplified shape but fail in capturing the full flow behaviour over a real vehicle. A model including vehicle body and tunnel geometry is presented in the literature and has been modified in order to improve its fidelity and reduce the di”erences with real life facilities. This model features an easy approach for the generation of the vehicle and wind tunnel models through 21 parameters as well as an automatic process for the setup of CFD cases, from meshing to simulation.