The 2016 Mazda Mazda3 is a 4-door, 5-seat Sedan, available in 20 trims, ranging from the i Sport (M6) Sedan to the s Grand Touring (A6) Hatchback. Upon introduction, the $17,845 i Sport (M6) Sedan is equipped with a standard 2.0L, 4-cylinder, engine that achieves 29-mpg in the city and 41-mpg on the highway. a Manual transmission is standard. The $26,495 s Grand Touring (A6) Hatchback is equipped with a standard 2.5L, 4-cylinder, engine that achieves 28-mpg in the city and 39-mpg on the highway. an Automatic transmission is standard.