...for example?
Well, the dodge RAM 2500 for a start, that like 4 smartcars long by 1.5 wide right there. :D (Theyve got those on the road here in sweden)
Perhaps not so many of those monsters in the UK, but I would say the larger Jags, 4wds or BMWs etc are at least half the length again than the average 2 door 4 seaters.