Subaru is working on a new flat‑four powerplant that aims to achieve a thermal‑efficiency rating of around 50 percent, a significant leap over conventional gasoline engines. The project focuses on advanced combustion and engineering techniques to boost fuel utilization while maintaining the brand’s characteristic boxer layout. If successful, the engine could set a new benchmark for efficiency in the automotive sector.
Subaru is developing a next-generation flat-four engine with an ambitious 50% thermal-efficiency target.
