The geometric influence of the lower side details of a ground vehicle such as exhaust pipe, chassis, fuel tank, among others can affect the aerodynamic coefficients, particularly the drag coefficient (Cd) [1]. For this reason, it was decided to compare two models of the same hatchback type ground vehicle using Computational fluid dynamics (CFD). The first evaluated model considers all the lower side details and the other model is simplified with a totally flat floor. The vehicle used was a 2005 Chevrolet Spark Phase 2- Segment A, with a Hatchback bodywork. The digitalization of the vehicle was developed with a scanner. Two different handy scanners were used: the 3D EVA Scanner for large areas and the 3D SPIDER Scanner for details, both made by the ARTEC-3D brand. In total, 65 point clouds were obtained (including the underbody details), which were filtered and registered. Afterwards, a surface mesh was adapted over the point cloud to create the Nurb curves and the surfaces were generated.