I think 57,312% real, although i might be slightly wrong here!
That's not very informative ;]
It looks real if you step back a bit, but peeping at individual parts makes the image break apart.
First of all, the Motion blur. Your backdrop MoBlur and the Rest don't line up. It confuses the perspective. The Background seems to go down or at a diagonal depth direciton. See Image.
Next is the cleanness of individual parts. This sucks in automotive generally. The client wants a flawless model with perfectly clean everything. This promotes the artist to make the materials too simple and the whole things ends up looking to "clean to be real". It's a real dilemma.
Take a look at this recent thread.The artist perfectly recreated the physical appearance of the Jet Engine and it ended looking like a toy. Ironically, even a moderator said, it is correct:
I would give low glossiness reflections to base material too. Other than that, your setup looks pretty much correct.
Only once a real person showed a photo, it became clear, that the physical property is only half the battle. It takes a crap load of detail to sell realism. You basically become a slave of diminishing returns, but it is what it is.
The dirt on the bottom does not help the upper body.
Also this chair. In the last image in the post you can see, how the apparently clean look is actually made up of a material that is uneven as hell. This sells the effect.
Everyone struggles with this, but it is nowhere as extreme, as in automotive, where even motionblur adds to produce an unrealistic smooth result.
I suggest you crop the image to the worst parts and work on those, until you are happy. Note, that in automotive you will not get a photoreal result, as this is in direct contrast to what you are actually creating: A idealized presentation of a product
Take a look at the cropped parts I uploaded and try to work of those.
It is a real painful struggle from here on out ;]
I suggest you actually switch to a simple scene with no MoBlur and just a simple HDRI in brought daylight. This will give you a different perspective to work of. Then once you switch back it may be easier.
tl;dr:
At this point there is no magic simple answer, except add detail to match your own vision, look at reference from real automotive photos.
Kinda like "just be yourself". Complete useless advice to the person in question, unless you actually find your own way.
edit:
Did you mean 57.312% or 57,312%?
Hahahah.heh heh :|
I just finished programming a tool, with parsing tables being a component.
Client started the tool and everything crapped the bed, because of Dot vs Comma. I was smart enough to account for that, but somewhere I mixed it up. God dammit.
Localisation is a bitch.
edit2:
just noticed, the motionblur is bugged at the edges of the backdrop. I presume you did this in photoshop?
The Edges are progressively less blurry and become smeared, this needs fixing.
