"Toyota, Mazda, Subaru Collaborate on Next-Gen Combustion Engines"

Toyota, Mazda, and Subaru are collaborating to develop new internal combustion engines that will be compatible with carbon-neutral fuels like liquid hydrogen, biofuel, and synthetic fuel. Each company will focus on their signature engine types: Toyota on inline-fours, Mazda on rotary engines, and Subaru on horizontally opposed boxers. The new engines aim to improve efficiency and performance while allowing for more aerodynamic and design flexibility in future models. Despite the collaboration, the companies will remain competitive with each other.