It'll be interesting to see how many review contributions there are although I'd imagine a 2.5 litre injected 'Beemer' (I watched Top Gear on Dave once) is viewed as a good "get you home for weekenders" machine that a fair few Royals aspire to, or indeed, own
Not as handy as a Tardis perhaps, but worth pointing out that RM recruits cannot bring vehicles to CTC whilst in training due to the fact a good many recruits kept killing themselves over the years by making like a Nod and having an involuntary snooze whilst clogging along the fast lane.
Im still running an old E91 320d M Sport and I love it. I only use it for work, carting the dogs and my bike around and its great. I've also pulled our caravan with it. Ive racked up 183k miles and still she goes on like it was 50k