Toyota is making waves in the automotive industry with the introduction of smaller engines powered by carbon-neutral fuels, including liquid hydrogen. These engines, part of a new series of inline-four units, are designed with a focus on sustainability and efficiency. By downsizing the engines, Toyota aims to reduce environmental impact while enhancing performance on the road. The smaller engines are not only lighter and more fuel-efficient but also promise a revolutionary change in vehicle packaging, improving aerodynamics and fuel economy. In addition to the engine downsizing initiative, Toyota is taking a bold stance on hydrogen as a clean fuel choice. The company's commitment to hydrogen technology is evident in the development of hydrogen-powered engines and iconic vehicles like the Mirai. This strategic move aligns with Toyota's vision for a sustainable future and contributes to the transition towards cleaner energy sources. Furthermore, the new engines from Toyota offer impressive efficiency gains and power enhancements. With plans to introduce these engines in hybrid and plug-in hybrid vehicles by 2026, Toyota is combining known technology with sustainability. The company's focus on decarbonisation aims to ensure the long-term viability of internal combustion engines. Despite challenges such as the need for hydrogen refuelling infrastructure, Toyota's innovative approach to engine development and fuel choices signals a positive direction towards a more sustainable automotive industry.