If you’re looking for a rarefied combination of speed and practicality in something other than an SUV, you might find what you want in the Audi RS5 Sportback. Ostensibly a coupe, the RS5 Sportback nonetheless has four doors and a spacious hatchback cargo area, but don’t be fooled: this car’s true raison d’etre is its ferocious acceleration and razor-sharp handling.