The 2018 BMW M5 has inadvertently been revealed by the creators of the video game Need for Speed, as part of an email promotion for the upcoming game.

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Need for Speed Payback isn't due for release until November, but a teaser email sent out to fans of the game has accidentally revealed the front-end design of the all-new BMW M5, which is yet to be released.

A close-up look at the front reveals a rather sedate styling change for the twin-turbocharged V8 M5, with open air gates in the lower corners for airflow, and a broad central grille.

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We know that the next-generation BMW M5 will sport a quasi drift mode, activated by disabling the front axle via iDrive, and that it will pump out more than 450kW of power (or 603hp) from its twin-turbocharged 4.4-litre V8 engine.

The M5 will be BMW's first non-SUV M vehicle to sport an all-wheel drive system, which BMW dubs xDrive.

If the new Mercedes-AMG E63 S is anything to go by, it'll sprint from 0-100km/h in around 3.3 seconds, making it the fastest BMW M car available.

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Expected to cost more than the current BMW M5, the availability of all-wheel drive and a host of technology advancements should make this an extremely desirable sports tourer.

What do you think of the M5 front-end design?

Thanks to Will Varvari for spotting these and sending them through!