User blog comment:Subject 16*/Assassin's Creed: Revelations - News/@comment-3967387-20110514005249/@comment-3967387-20110514020827

I have no idea, but it doesn't neccasarily have to be his personal one. Neither Altair or Ezio had a personal horse, and I imagine if Desmond loves motorcycles so much that he would be able to hotwire them, or use his hidden blade as a key.