The dependability of any system that converts the linear movement of a piston into the rotational motion of a power transmission shaft is significantly dependent on the performance of the crankshaft. The crankshaft, a vital component of internal combustion engines, is a complicated device characterized by precise geometry and large-scale manufacture. This study focuses on analyzing and comparing the performance of a conventional and composite material Crankshaft. The comparison is performed by assessing critical aspects such as stresses, deformations, and weight reduction to provide significant insights on crankshaft performance. The results indicate that the weight of the Crankshaft decreased significantly from 4.18 kg in Structural steel to as low as 1.49 kg when using Al7075 + 9% B4C. The maximum Stress experienced by the crankshaft is reduced from 42.42 MPa in Structural Steel to 40.22 MPa in Al7075 + 3% B4C. The investigation optimizes designs for enhanced performance and weight reduction. The decrease of crankshaft weight is directly correlated with a reduction in the engine’s overall mass, hence improving fuel efficiency.