Its powered by a turbocharged 2.0-liter four-cylinder with a 12-volt hybrid system and all-wheel drive; the 40 makes 201 horsepower, while the 45 ups the output to 261.Long Audi’s bread and butter, the A4 sedan is now vastly outsold by the brand’s SUVs. Nonetheless, it remains a faithful distillation of Audi brand values: understated, elegant style inside and out. Ride quality that deftly balances comfort and performance. A lengthy roster of comfort and safety tech. Efficient turbocharged engines. And of course, the all-weather reassurance of Quattro all-wheel drive.