There?s a new kind of engine under the hood of the new Infiniti QX50. Like many of its competitors, it?s a turbocharged 2.0-liter inline-four, but what goes on inside is radically different from anything that?s come before it. For the first time in a production vehicle, there?s an engine that can change its compression ratio and even its displacement (a tiny bit), a project that, according to the company, has taken over 20 years. Why bother" Varying the compression ratio promises to maximize efficiency whether you?re cruising at part throttle or running toward the redline on 22.0 psi of boost. READ MORE ??
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