Asphalt 8: Airborne

There are four different stats you can upgrade on your cars, acceleration, top speed, handling, and nitro. The costs of upgrading these depends on the car itself self and can range widely. Also there are five levels per stat and each level costs more to upgrade than the previous one. Do this with three different cars and the achievement is yours! As a side note you do not need to use pro kits for this achievement.