The S4 is dead, but the new S5 is more powerful, larger, and gets much more tech.

Crossovers may be taking over, but Audi's not giving up on sports sedans. Surprising changes could give the all-new A5 and S5 ...

With the new A5 replacing the A4 sedan and A5 Sportback, Audi has tweaked and streamlined its compact offering.