(http://media.il.edmunds-media.com/chevrolet/sonic-rs/2013/ns/2013_chevrolet_sonic-rs_f34_ns_121911_196.jpg) On sale in late 2012, the new 2013 Chevrolet Sonic RS sports a 138-horsepower turbocharged Ecotec 1.4-liter engine and a choice of six-speed manual or automatic transmission.
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