There’s a war brewing. In the world of the all-wheel drive, best-of-the-best performance sedan, a new challenge approaches. Watching, warily from the corners is the 2017 Audi RS7 Performance, with its massive 605 hp and 553 lb-ft of torque. Then there’s the 6,000-pound elephant in the room, the Mercedes-AMG E 63 S, with its 603 hp and faintly ridiculous 627 lb-ft of torque. Each is a stellar performer, and each has some big new competition. The new 2018 BMW M5 is here, and I’ve been testing it on and off the track.

The technical specs make for some entertaining reading. Under the hood is BMW’s highest performing engine, a 4.4-liter twin-turbocharged V8 that’s good for 600 hp and 553 lb-ft of torque. Maximum power arrives early, at 1,800 rpm, and then runs all the way through to 5,600 rpm. It sounds pretty damn good while it does it, too.
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