Boosting with a second controller or a second player in private sessions works, so if you want to cheese it that's the best way. If you're playing solo, make sure you get this achievement as soon as possible because indie racers like these often have their population drop drastically after mere days or weeks, and since public matches will not start with any less than 4 human players, you'll be in trouble getting this one. Drive well by drifting in fast corners and using boosts coming out of slow turns, avoiding contact with walls where possible and you'll be winning races. Any game mode counts for this achievement.