Those looking for a budget-friendly sedan that can transport four adults in comfort need not look further than the 2021 Kia Rio. This small sedan is powered by a naturally-aspirated 1.6-liter engine that has enough zip to confidently navigate city streets while returning excellent gas mileage figures. The exterior features standard halogen headlights and 15-inch steel wheels with covers. For 2021, the Rio also gets a redesigned front and rear bumper. The interior features air conditioning, Bluetooth streaming, front USB ports, an auxiliary port, and a six-way manually-adjustable driver's seat. The trunk offers 13.7 cubic feet of space.