The next-generation BMW M3 and M4 due in 2020 will receive a significantly upgraded six-cylinder engine capable of more than 500bhp in its top form.
The flagship model to use this new engine will be a new M4 Gran Coupé (imagined by Autocar above), the first time the four-door coupé has featured a full-fat M variant. It will be joined once again by two-door coupé and cabriolet variants, beside the M3 saloon.
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