Its just a sketch….and a much better one than I can do….BUT, that would have taken about 10 minutes top, probably less, so designers will create hundreds and hundreds of thumbnails like this. When I worked on the F1 GT front end concepts (I had nothing to do with the rear) I must have had a couple of hundred thumbnails like this…anyway I digress, the point is, probably don’t read too much into this. When concepting, you take liberties with the proportions.
Assuming this is as per a 'real concept' (and limousine in some languages means saloon) I’d agree, its Passat, A4 size. It’s a very Audi influenced design.
Take away the SEAT
badge and its very close to the A4 right down to the bonnet and side shoulders, even the bumper lines and lights. The way the bottoms of the doors integrate into the sill hints at A4 door blades. Luc Donckerwolke is great with detail design, and even as a design director, I suspect he’s very hands on with that.
Still lots of pre-Donckerwolke influence in that car from the Da Silva era (who IIRC is above Luc in VW Audi).
The dynamic line has gone (yeah!!!), but the new less dynamic line does seem to taper down towards the rear, a little like the Jaguar S-Type. IMHO, that line isn’t that successful on the Jaguar, so its relationship with the trunk will be critical.
I do like the angled front, look at the lower bumper. Its just a sketch so crash structures, ped safety will probably cause issues with this, but it looks great. Makes it look very dynamic.
Overall its much more conservative, BUT the Toledo, Passat market needs that. I’m sure this will share the chassis with something, maybe the Passat or Skoda Octavia