  By means of the Boltzmann equation, we have calculated some magnetotransport
quantities for the layered multi-orbital compound Sr$_2$RuO$_4$. The Hall
coefficient, the magnetoresistance and the in-plane resistivity have been
determined taking into account the Fermi surface curvature and different time
collisions for the electrons in the $t_{2g}$ bands. A consistent explanation of
the experimental results has been obtained assuming different relaxation rates
for the in-plane transport with and without an applied magnetic field,
respectively.
