  We present the results of multisite observations spanning two years on the
pre--main-sequence (PMS) star V351 Ori. A total of around 180 hours of
observations over 29 nights have been collected, allowing us to measure five
different periodicities, most likely related to the delta
  Scuti variability of V351 Ori. Comparison with the predictions of linear
nonadiabatic radial pulsation models put stringent constraints on the stellar
parameters and indicate that the distance to V351 Ori is intermediate between
the lower limit measured by Hipparcos (210 pc) and that of the Orion Nebula
(450 pc). However, radial pulsation models are unable to reproduce all of the
observed frequencies with a single choice of (M, L, and Te), suggesting the
presence of additional nonradial modes.
