What is the best naturally aspirated engine?

In the Malaysian market, the Honda L15ZE and Mazda Skyactiv-G 1.5L engines are among the top naturally aspirated engines. The Honda L15ZE employs DOHC i-VTEC technology, delivering a maximum horsepower of 121 PS and a peak torque of 145 Nm. The Mazda Skyactiv-G 1.5L, on the other hand, features direct injection and a high compression ratio design (14:1), producing 114 PS of horsepower and 148 Nm of torque. Matched with the precise 6-speed Skyactiv-Drive transmission, it shifts swiftly with responsive power delivery, particularly excelling in low-rpm torque performance. Both engines are renowned for their mature technology and driving experience; the L15ZE emphasizes high-rpm performance and durability, while the Skyactiv-G prioritizes efficient combustion and smoothness, making them both benchmark choices among naturally aspirated engines in their class.