The Kia K900 doesn't generate a lot of sales, but it demonstrates all of Kia's know-how just the same. This luxury sedan comes standard with a 311-horsepower direct-injected V6 or an optional 420-horsepower, 5.0L V8, both of which paired with an eight-speed automatic. As a K900 owner, we'll have the chance to join Kia Premium, which offers several advantages including five years of free maintenance.