Two Sedans with some similarities, but otherwise different in most aspects such as the powertrain, fuel economy, model year, market segment, starting price, and horsepower. First of all, there is a $10,950 difference in the base MSRP. The 2014 Acura RLX Hybrid, an older vehicle by two model years, has a higher starting price than the 2016 Kia K900. Also, a bigger engine usually means less mpg. But the 2014 RLX Hybrid has a more powerful engine and it gets 11 more mpg than the 2016 K900. Among similarities are the body structure, market segment, ground shadow size, height, and maximum occupancy.