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Numerical prediction of the aerodynamics around cars has long been one of the rudimentary needs in automotive engineering. Despite all of the recent developments in Computational Fluid Dynamics (CFD) and its constituent technologies, however, it’s still not an easy task to accurately predict the flows around and the aerodynamic forces and moments acting on ground vehicles. The complex configurations and flow physics involved in ground-vehicle aerodynamics require, among other things, sophisticated geometry modeling and meshing tools, advanced turbulence models and an efficient solution algorithm. This paper discusses various aspects of applying modern Computational Fluid Dynamics (CFD) to the prediction of aerodynamic flows around ground vehicles.