Toyota has introduced a new range of combustion engines that are not only smaller in size by 10-20% but also more fuel-efficient and powerful. These engines can operate on multiple fuels, including hydrogen, as part of Toyota's strategy towards carbon neutrality. The development process involved learnings from the GR Corolla race car, particularly focusing on thermal efficiency and utilizing carbon-neutral fuel alternatives like synthetic e-fuels, biodiesel, and hydrogen. The new engines include 1.5-litre naturally aspirated and turbocharged units, as well as a 2.0-litre turbocharged engine. While they may have shorter strokes and less torque compared to older models, they are optimized to integrate seamlessly into hybrid drivetrains to enhance overall efficiency. Toyota plans to roll out these engines in European markets before the Euro 7 emission norms take effect in 2027, with a vision for future iterations to run entirely on carbon-neutral fuels. The development journey of these engines was influenced by Toyota's involvement in the GR Corolla race car, where the team overcame challenges related to the unique characteristics of hydrogen as a fuel source. By leveraging the experiences from racing, Toyota's engineers successfully tackled thermal efficiency issues, paving the way for the creation of these advanced engines. Overall, Toyota's innovative approach towards engine design not only emphasizes performance but also aligns with the company's commitment to sustainable technologies and reducing carbon emissions. The upcoming deployment of these engines signifies a significant step towards achieving Toyota's vision of a more environmentally friendly automotive industry.