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In India, B7 (a biodiesel mix of 7% by volume in diesel) has been approved for use in diesel engines. Due to the depletion of fossil fuel supplies and tight pollution requirements, alternative diesel fuel has become critical. However, given the properties of diesel, no direct renewable alternative fuel can totally replace diesel. As a result, one of the solutions may be to replace part of the diesel with ethanol. In this inquisition, the impact of various diesel-ethanol blends, counting ED7.7, ED10, ED15 and ED20, were examined on two in-use multi-cylinder engines complying to different emission norms. The two engines under consideration complies with CPCB-I and CPCB-II, which is an Indian legal requirement for stationary Genset engines. For both engines, a 5-mode steady-state test cycle was considered. For each mode, the engine’s performance characteristics, including power, torque, and BSFC, were tested and described.