In biped robot locomotion, mostly a serial type legs have been used so far. This type of leg shows many disadvantages, like significant weight, low stiffness and poor disturbance rejection. All of the above result in high energy consumption and low stability. In this paper, an analysis of a new type of leg, i.e. three degrees of freedom delta type leg is investigated. First, a kinematic analysis of both delta and serial robot is performed, including forward and inverse kinematics calculation, visualisation of the robots and workspace analysis. Further, equations of motions for both robots are implemented and tested in Simmechanics environment. Finally, both models are compared in terms of performance in different walking scenarios. In this paper, it is shown that in specific scenarios, delta leg is superior to the serial type in terms of maximum torque and energy consumption.