To unlock this achievement you first need to unlock the Accelerato Boost then play a game on the Utopia Coliseum using one of the original battle-cars Octane, Zippy, Backfire or Scarab.
Fastest way to do this is to create an Exhibition Match and select Utopia Coliseum as the Arena and once the game starts hold down
to boost and this achievement will pop.
*Item unlocks are random so the Accelerato boost could be one of the first items you unlock or possible one of the last just keep playing games to unlock an item each time.
*To check if you have unlocked the Accelerato boost check in the garage menu under the Rocket Trails section.