The Kia Rio is now widely regarded as the best small car on the market, but how long will it survive? This segment of the auto industry is quickly fading as more and more consumers turn to SUVs and crossovers. With the four-door sedan gone, only the Rio 5-Door hatchback remains. Under the hood, you will find a 1.6-litre four-cylinder engine that produces 120 horsepower along with 113 pound-feet of torque.