<p>To guarantee automobile stability, driving safety, and riding comfort, the responsiveness of suspensions is crucial. The hydraulic damper behavior disperses during the compression/bump and the extension/rebound phases. Dampers differ from absorbers since they are equipped with springs in practice. The automotive industry uses experimental tests to confirm hydraulic dampers performance. Indeed, hydraulic dampers manufacturers tune experimentally piston and base valves to customize their products. However, this approach is costly since it requires various tests. This work presents firstly an experimental study on a twin-tube automobile hydraulic damper, in compression and in extension, for different piston and base valves configurations. Two reference excitation velocities were used, toward an optimal valves configuration meeting required specifications. The damping force was tracked and the standing force was highlighted. This work presents secondly a numerical approach within a numerical study. It was implemented using the optimal piston and base valves configuration, in extension and in compression, for the different excitation velocities. The fluid flow (pressure and velocity) was highlighted and the damping force was tracked. The comparison of the numerical and the experimental results confirms that it is possible to replace experimental tests by numerical tests toward cutting tuning costs.</p>