In this paper, we have considered the flow and heat transfer between two co-axial porous rotating discs of different transpiration for small cross flow Reynolds numbers. The discs are rotating with different angular velocities and they are maintained at different but constant temperatures, while the rate of injection of the fluid at one disc is different from the rate of suction at the other disc. The problem is solved by perturbation technique, taking cross flow Reynolds number as perturbation parameter. The expressions for radial, transverses, axial velocity components and temperature have been obtained and numerical results have been worked out for different values of parameters involved in the solution. The skin-friction coefficient and Nusselt number have also been calculated at both the discs for various cases and these results are expressed in a tabular form. The first order components of velocity have been presented graphically for different values of visco-elastic parameter.