VANCOUVER, BC, Canada – Mazda says it rethought common thermodynamic principles in the development of its new Skyactiv-G 2.0L 4-cyl. gas engine. The engine has an “extraordinarily high” 13:1 compression ratio only seen thus far “on high-performance race-car engines,” the auto maker says. Ritaro Isobe, group manager of Skyactiv-G development, says the compression ratios for most engines, including downsized turbo mills, range from 9:1 to 11:1. Even the Ferrari 458 supercar only has a ...

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