With up to 640 horsepower, the 2021 Porsche 911 Turbo and Turbo S are the company's latest salvo in the horsepower wars. High-output sports cars such as the 577-hp Mercedes-AMG GT R, the 602-hp Audi R8, and the 631-hp Lamborghini Huracán Evo are all rivals to both 911 Turbos, but none of them come with the same heritage and storied history. With coupe and cabriolet body styles, they offer similar standard and optional equipment as lesser 911 models but are powered by a more powerful twin-turbocharged 3.7-liter flat-six engine located—where else?—in the rear. While the 2021 911 Turbos are very expensive, their incredible performance and divine driving nature are worthy of our Editors' Choice list.