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What Is Different About A Miller-Cycle Engine And Why Did Mazda Use It?

What Is Different About A Miller-Cycle Engine And Why Did Mazda Use It?
technology10/19/2025

Miller cycle engines -- like those once used by Mazda -- make less power more efficiently by holding the intake valve open for part of the compression stroke.

The Mazda CX-90 feels like a bona fide luxury SUV, but the company's current upmarket push isn't its first. At one time, Mazda was actually going to launch its own luxury sub-brand, and it would bring innovations like a supercharged Miller-cycle engi... [3631 chars]