The Chevrolet Aveo is GM's smallest, least expensive car. Aside from its price, what's most attractive about Aveo is its surprisingly handsome interior, at least on the up-level Aveo 2LT. The 2010 Chevrolet Aveo comes with an updated 1.6-liter four-cylinder engine rated at 108 horsepower, which is adequate for such an affordable car. Transmission choices are either a five-speed manual or a four-speed automatic.