In England, the race to find alternative fuels to replace traditional ones is in full swing, with a focus on clean transportation and carbon neutrality. While hybrid systems and electric drivetrains have made significant advancements, hydrogen and nitrogen engines are emerging as potential game-changers. Hydrogen, known for its fast refueling and zero emissions, faces challenges with infrastructure and cost, hindering its widespread adoption. On the other hand, nitrogen engines, particularly being developed in London, offer environmental benefits, cost-effectiveness, and lighter weight, despite obstacles related to storage and environmental impact. Although nitrogen engines are not yet ready for mainstream vehicles, they present an exciting new technology that could potentially compete with hydrogen in the clean fuel race. While hydrogen currently leads the way, with examples like Renault's Ampere Emblème hybrid, which combines electric power with a hydrogen fuel cell, the development of nitrogen engines showcases a promising shift in the automotive industry towards more sustainable and efficient fuel technologies.