The automotive sector is experiencing a challenging period due to the continuous tightening of the emission limits. The European Union is leading this transition with the “Green Deal”, which has set the goal of cutting Green House Gases (GHG) emissions by at least 55% by 2030 and the complete zeroing of new vehicles CO2 emissions starting from 2035. The usage of alternative fuels, such as hydrogen, in internal combustion engines can reduce emissions and be compliant with future stricter legislations. In such a framework, this thesis aims at assessing, through numerical simulations, the potential in terms of both performance and efficiency of a Hydrogen fuelled Internal Combustion Engine for hyper-car applications.