What Car? says...
The Audi RS7 Sportback. Probably the burning question on your lips is: is it quick? Let’s get that out the way from the start: yes. It’ll do up to 174mph and 0-62mph in a whisker under four seconds.
It’s built by Audi Sport, which is Audi’s performance arm, and, as we know from previous experience, the bunch of boffins at Audi Sport know a thing or two about building very fast cars. Think of Audi Sport along similar lines to BMW’s M division and Mercedes’ AMG, and you get the idea.