Available as a coupe or a sedan, the compact 2010 Chevrolet Cobalt achieves at least 30 mpg on the highway across all four trims including the very sporty SS. The standard engine is a 2.2L inline four-cylinder engine which is connected to five-speed manual and produces 155 hp. The SS version sports a 2.0L turbocharged four-cylinder pushing out 260 hp which is mated to a five-speed manual. A four-speed automatic is optional for all trims except the SS. A power sunroof is now standard equipment on the 2010 Chevrolet Cobalt SS.