Car shows are boring for people who aren’t power-obsessed, like us. However, we’d like to fantasize about a blockbuster title like „Frankfurt 2015: Clash of the Titans.“ You see, while Mercedes dropped the ultra-luxurious S-Class Cabriolet, Audi proved that its 4-liter twin-turbo V8 can deliver 605 horsepower in the S8 plus.

The 4.0-liter engine came into this world like a nuclear explosion. Not only did it suc…