The automotive industry is exploring liquid nitrogen cars as a potential game-changer in green transport. Unlike electric vehicles with charging constraints, liquid nitrogen cars can be refueled quickly, providing a practical alternative to traditional gasoline cars. These vehicles are touted for being safe, with no toxic emissions and minimal environmental impact. The simplicity of the nitrogen engine design promises cost-efficiency in manufacturing and maintenance. Additionally, liquid nitrogen, a readily available resource from air, offers sustainability in fuel supply. The technology, however, faces challenges such as limited range and the need for efficiency enhancements in air motors. R&D efforts focus on improving motor efficiency, storage mechanisms, and infrastructure for mass adoption. Despite the hurdles, liquid nitrogen cars hold promise for emission-free transportation, powered by renewable energy sources. With ongoing advancements, these vehicles could become a significant player in the green technology sector, offering a greener alternative to current fuel technologies.