This is the 2018 BMW M5

The sport sedan\'s official debut is scheduled for later today.

Low-resolution images compiled into a Youtube video have prematurely revealed the brand-new 2018 BMW M5. The sport sedan's official debut is scheduled for later today.

Based on the brand-new 5 Series, the next M5 receives a more muscular-looking bumper with three large vents that direct cooling air to the engine bay. The look is inspired by the smaller M2 and M3 models. Out back, we can see an air diffuser and four exhaust tips.

Power will come from a tweaked version of the outgoing model's turbocharged 4.4-liter V8 engine. Surprisingly, enthusiast forum M5Post reports the eight-cylinder will generate at least 680 horsepower, though nothing is official yet. That figure would allegedly give the M5 a neck-snapping 2.9-second zero-to-60 sprint.

BMW has previously confirmed the all-wheel drive rumors are true. The M5's xDrive system system will offer three modes named 4WD, 4WD Sport, and 2WD, respectively. Self-explanatory, the first one is the M5's default mode. The second mode puts a bigger focus on handling, while the third one completely shuts off the all-wheel drive system and sends 100 percent of the engine's torque to the rear wheels.

BMW explains the setup will offer the best of both worlds. The M5 will retain the rear-biased handling that has earned it a Greek god-like reputation over the past three decades. It will also offer the benefits of all-wheel drive -- notably extra traction in adverse weather conditions -- when needed.

The M5 is going automatic-only for the first time since its inception. The last-gen model's six-speed manual transmission won't return because there's virtually zero demand for it, so the only unit offered will be an eight-speed automatic with shift paddles.

Stay tuned, we'll bring you official information about the next BMW M5 in the next few hours. It will be presented to the public next month at the Frankfurt Auto Show, and it will arrive in showrooms early next year.

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