Chevrolet offers the Sonic with the optional 138-hp 1.4-liter turbo four on LT and LTZ trims but makes the little huffer standard in the sporty RS package. Midway through the 2014 model year, Chevrolet added the RS package to the sedan; it had been hatchback-only when it arrived for 2013. This demonstrates that, besides figuring […]

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