It's quite possible that this VW Beetle drifting the Top Gear test track is in Forza simply because the real world could not contain this much awesome.
There is a very solid chance that this much drift action in an old Beetle would cause a critical rupture in the space/time/radical continuum, shattering all life as we know it.
Advertisement
But then again, maybe I should still take my Bug out on track to find out.
(Hat tip to Oran!)