AutoCar's rendering actually makes the idea look like it works and the product is quite appealing. The sloping rear roof would give it a compact 'four door' coupe with sleeker lines just like the CLA. Think of it as an entry level A7 and it does not sound quite so crazy.
Coupe sales are floundering namely in Europe where they are down 31%. As long as sales of the sedan preserve the TT coupe and help Audi get more money out of the platform AudiBoost can not think of a reason why this idea should not be explored. The CLA-Class is a huge hit and a four door TT is poised to be the perfect response. Feel free to debate the idea but it certainly sounds logical on paper.