Ñ Simulation of the Intake and Compression Strokes of a Motored 4-Valve SI Engine with a Finite Element Code Ñ A CFD code, using a mixed finite volumes-finite elements method on tetraedrons, is now available for engine simulations. The code takes into account the displacement of moving walls such as piston and valves in a full automatic way: a single mesh is used for a full computation and no intervention of the user is necessary. A fourth order implicit spatial scheme and a first order implicit temporal scheme are used. The work presented in this paper is part of a larger program for the validation of this new numerical