2025 Kia K4 Hatchback Mpg. Get the most useful specifications data and other technical specs for the 2025 kia k4 ex fwd. Fuel efficiency runs between 30 and 40 mpg with the base engine.
See body style, engine info and more specs. While the visuals suggest that this is a hatchback, the k4 is actually just a fastback sedan like its k5 sibling.