Every vehicle runs on internal combustion engine and used at least one connecting rod in automobile field. More number of compressive and tensile forces is acting on the connecting rod due to fuel consumption so that failure can occur. To overcome this problem, carbon steel connecting rod is replaced by aluminium matrix composites due to good characteristics like better thermal conductivity, good heat transfer rate, lighter in weight, great strength, high stiffer and suitable for I.C. engine. In this investigation, a review has been attempted to find the better composite material and optimization of connecting rod in order to reduce the weight, displacement, strain, and stress by increasing the strength or by maintaining the strength. Also this review paper guides towards proper selection of reinforcement which has to be added to composite materials by considering economical and feasible manufacturing process in designing and production. Generally stir casting process is used for fabricating composites that are used in making connecting rods.