They finally spent a bit of money on a Transformers movie.
One thing you have to appreciate about the Transformers franchise is that the premise allows for a huge variety of different vehicles to be used. There's something for everyone, even fans of industrial equipment. Although, granted, that isn't a huge niche. Fans of exotic supercars have been thrown a few bones as well, but by far the most exotic vehicle to appear in any of the films will be the Pagani Huayra that will show up in the upcoming fourth installment.
The car was spotted taking a break from filming and driving around Beverly Hills. It takes quite an exotic car indeed to still stand out this much in Beverly Hills.