The oblique impact and penetration of long rods is investigated both experimentally and numerically. In the experiments a long copper rod impacted obliquely an aluminum plate at a velocity of 850 m/sec. We have chosen ductile materials like aluminum and copper to ensure that the results are not sensitive to the failure model used in the calculations. The low density of the aluminum, and the relatively small sizes of the target plates enabled us to resolve the material interfaces in the X-ray shadowgraph taken during the penetration. The numerical simulations were carried out in the multimaterial Euler-with-strength processor of the three dimensional code MSC/DYTRAN. There is a good agreement between the computations and the experimental results, as to the shape of the projectile and target during the penetration process.