The 2018 Chevy Sonic LT RS 1.8L hatchback is a front-wheel-drive, 5-passenger subcompact car combining a naturally aspirated 1.8L engine with sporty RS cosmetic styling and a practical 5-door hatchback body. It delivers 138 horsepower, an estimated 25 city / 34 highway MPG, and versatile cargo room. 1.8L ECOTEC 4-cylinder engine producing 138 hp at 6,300 rpm and 125 lb-ft of torque at 3,800 rpm.Transmission choices: 5-speed manual or 6-speed automatic.Fuel economy: Around 25 mpg city and 34 mpg highway (automatic) or 26/35 mpg (manual). Sporty exterior accents including fog lamps, rear spoiler, black bowtie emblems, and unique rocker panels.Distinct alloy wheels usually sized at 16 or 17 inches depending on package configurations.Interior styling touches featuring a leather-wrapped flat-bottom steering wheel with contrasting stitching and RS badging. 7-inch color touchscreen with Chevrolet MyLink, Apple CarPlay, and Android Auto capability.Comfort features including upgraded cloth seating, power windows, power door locks, and heated side mirrors.Cargo capacity: 19.0 cubic feet behind the rear seats, expanding up to 47.7 cubic feet with the rear seats folded flat.