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In the current scenario of automotive industries, designers are focusing on the development of lightweight, compact and high pressure engines. This demands downsizing of the engine components without compromising its strength. Crankshaft design is crucial in deciding the engine efficiency along with higher strength to weight ratio. Hence, the precise knowledge on crankshaft bending and torsion rigidity is required at design stage. This greatly influences on life performance of crankshaft, engine block and bearing. The study aims at a) Evaluation of crankshaft bending rigidity by Finite Element Analysis (FEA) and its experimental validation, b) Study the effect of crankshaft orientation on bending rigidity and c) Evaluate most critical geometric parameters of the crankshaft (Crankpin and Journal diameter, Pin and Journal width, Throw, Web thickness and Web width) and their quantitative contribution to bending rigidity.