Sure why not. I bring out my trusty wikipedia (and lol at this
)
"A silhouette is the image of a person, an object or scene represented as a solid shape of a single color, usually black, its edges matching the outline of the subject. "
It's neither a solid shape nor block colour, it's merely a picture of a car in a garage with only the front bumper showing from light. It also is not an outline of the object due to the angle it's at.
Photoshopped or not, I really can't see how that is a silhouette whatsoever, and that's down to personal opinion but I know I'm not the only one to agree
Don't get me wrong it's a nice photo and I like the idea and haven't seen anything like that done before, but I still don't think it's a silhouette.