Hydrogen combustion in vehicles presents an intriguing alternative to traditional electric vehicles by leveraging the combustion of hydrogen in internal combustion engines, resulting in only water vapor emissions. While hydrogen-powered vehicles like the Toyota Mirai and Hyundai Nexo are classified as fuel-cell electric vehicles, the concept of hydrogen combustion offers a distinct approach by mimicking the familiar internal combustion process but with hydrogen as the fuel source. This article explores the potential of hydrogen combustion technology and its challenges. One of the primary advantages of hydrogen combustion vehicles is their environmentally friendly operation, with water vapor being the sole byproduct. However, the production of hydrogen raises environmental concerns, particularly when generated through industrial processes like steam reforming. Despite hydrogen's abundance, ensuring eco-conscious production methods remains a challenge, with electrolysis showing promise as a greener option powered by renewable energy. Energy efficiency is a critical aspect where hydrogen combustion technology faces shortcomings. While hydrogen offers higher thermal efficiency compared to gasoline due to its faster flame speed, its lower energy density necessitates more fuel for equivalent travel distances. This inefficiency poses a barrier to widespread adoption, especially when compared to the higher efficiency of battery-electric vehicles. The allure of hydrogen combustion vehicles lies in their emissions-free operation and distinctive combustion engine sounds, appealing to automotive enthusiasts and environmental advocates alike. However, challenges such as infrastructure development, public perception, and the need for more sustainable production methods hinder the mass production of hydrogen combustion vehicles. Despite its potential, further advancements and investments are required to overcome these obstacles and realize the promise of hydrogen as a viable fuel source in the automotive industry.