Анотация: In order to reduce the harmful emissions from road transport, the exploration for new alternative energy sources is required. One of these new energy sources is alcohol, which has been used more and more frequently in recent years, both in gasoline and diesel engines. Butanol is a type of alcohol, green energy resource, derived from the fermentation of non-consumable biomass. The report examines butanol as an alternative source of energy and its impact on the power and environmental performance of the diesel enginе