In the last several years the MANET routing protocols and mobility model combinations have been studied widely. These studies have used different MANET parameters for performance evaluation due to which the uniformity for the sake of comparison among the research works has been missing. This work provides a comprehensive study using wide range of MANET parameters, and draws conclusions for the performance of routing protocols under different mobility models. The routing protocols used are DSDV, AODV and DSR. The mobility models used are Random Way Point (RWP), Gauss Markov (GM) and Reference Point Group Mobility (RPGM). The performance metrics used are Packet Delivery Ratio (PDR), end to end delay and throughput. The NS-2 simulation tool has been used for the study.