1 0 0Just wait at the finish line until the race completes, the other racers will then go really slow and you'll have 30 seconds to just hang behind one and repeatedly ram them until they are wrecked and you get the achievement.
1 0 0Achievement can be obtained at the hippodrome east of Alexandria (same place for Ben Hur achievement). I think you need to complete the side quests in the area before to unlock it - not sure because i completed everything anyway before attempting this.For those who didn't manage to do this from the first tries:- remember that there are no difficulty related achievements- on hardcore destroying a carriage in 3 laps is close to impossible due to trashy camera and controlsI strongly advice to change it to easy for this achievement and avoid annoying yourself with a poorly designed minigame.Managed to achieve this on the first try on easy after a frustrating hour of attempting in on nightmare difficulty