Perhaps too much attention to detail to be convincing?
Compare the replica with a real one (below), and you won't find any rows of exposed, polished alloy rivets or diamond plate polished stainless steel flooring in the real thing.
Lots more images here -
http://www.finecars.cc/en/detail/car/14431/index.html
Note the simple rubber floor mats, rubber pedals (VW?) and a black painted handbrake lever. There's also no chrome windscreen surround on the real thing.