Savonius turbine is self-starting and thus useful in low-flow streams. The biggest problem with Savonius turbine is its efficiency. Innovations are being implemented in its design to address this issue. In this work, it is attempted to work on clearance between the stages as a design means for meliorating its torque coefficient. Staging of Savonius turbine has been found to upgrade Savonius turbine performance. In this regard, a double-stage double-bucket Savonius turbine is designed and tested in a water channel at various flow rates (0.4–0.6 m/s) and turbine loading (100 gm to 1000 gm). The distance between stages is variable between 0 and 10 mm, with a 5 mm increment. The torque coefficient of the turbine is observed to be impacted by the clearance between the turbine stages as well as influenced by the flow speed. The ideal loading condition (i.e., 1000 gm) and the ideal clearance (i.e., 5 mm) have been identified for a higher torque coefficient (0.2214) of the designed turbine. Additionally, the effects of the operating tip speed ratio and contribution of the hydrodynamic torque in torque coefficient have also been quantified.