In this modern era the road accidents, traffic are increasing day by day. A smart technique is required to tackle these problems. So for wireless communication, Vehicular Adhoc Network (VANET) is highly influenced research area that has been developing very fast. Presently this area is not as mature as certain issues need to be addressed. Considering Routing Protocols as an important area in VANET, work has been done in this paper. In doing so AODV, DSDV, DSR and GOD Routing Protocols have been evaluated in terms of Parameters namely Packet Collision Rate, Packet Drop Rate and Throughput Rate. Based on the aforementioned parameters this paper further compares and evaluates the performance of 802.11a interface with 802.11p MAC Interface when speed of multi interface car is varied. The simulations are performed on GUI Based Tool NCTUns 6.0.