  An intermediate inflationary universe model in the context of a generalized
Chaplygin gas is considered. For the matter we consider two different energy
densities; a standard scalar field and a tachyon field, respectively. In
general, we discuss the conditions of an inflationary epoch for these models.
We also, use recent astronomical observations from Wilkinson Microwave
Anisotropy Probe seven year data for constraining the parameters appearing in
our models.
