The vast array of electric vehicles and fuel-sippers we see at motor shows like the recent Frankfurt bash are all well and good. But let’s face it: The really good stuff converts lovely, delicious gasoline into magnificent kinetic energy. Like the new wave of Audi’s S cars. These gutsier, tauter versions of the A6 (in both sedan and wagon—or Avant—form), the A7 Sportback and the A8 debuted in the city of franks. Except for the S8, the cars run with a twin-turbo, 4.0-liter V8 using the company’s fuel stratified injection technology to help conjure up 420 hp and 405 lb-ft of torque. The S8 gets 520 hp and 479 lb-ft from its 4.0-liter TSFI V8. This all means more power than earlier S models, but fuel consumption is down by around 23 percent. There’s little chance we’ll see the S6 Avant over here, but Audi, bring the rest over, please.