The depletion of fossil fuels has raised an urgent demand for carrying out work for researchers and scientists to find an alternative fuel for a more stabilized emission and to minimize the environmental damage and their impact on the future generation. In the future, the energy system needs to be stabilized and has too renewable, sustainable, convenient, and efficient. The convection of all the combustion-based cars into the electric car may not be a suitable idea since the massive creation of the electricity in present technology is also a non-renewable source. So, research has come up with the idea of using alternative fuels in transportation to reduce carbon emissions and preserve fossil fuels for future generations. There is a variety of alternative fuels for an internal combustion engine. However, the hydrogen based internal combustion engine is estimated to be one of the most significant fuels in the near future to meet the stringent emission norms. The hydrogen usage in the internal combustion engine represents the alternation of petrol to produce the maximum amount of energy. In this paper, a study has been performed to understand the performance of the four-stroke hydrogen engine, which is compared with the standard four-stroke petrol engine to observe the energy supplied, energy losses by the exhaust gasses, thermal efficiency, and work done for both the engines.