Here is the latest speculative rendering of what the future BMW M4 is envisioned to look like, as interpreted by artist Roger Lighterness.

Here is the latest speculative rendering of what the future BMW M4 is envisioned to look like, as interpreted by artist Roger Lighterness.

Recently we've seen the spy photos of the 4-Series, which are essentially re-badged versions of the 3-Series coupe and convertible, but prototypes of the new high performance M4 variant have yet to hit the roads. Still, morsels of information have managed to find their way into the public domain.

Most recently it was confirmed by President of BMW North America, Mr. Ludwig Willisch, that the next generation BMW M3 (F80) and M4 (F82) will indeed incorporate an inline six-cylinder engine unit as opposed to a V6. The new inline six-cylinder will replace the 4.0-liter V8 that resides in the current M3 coupe/convertible/sedan. It has been suggested that the six-cylinder will displace 3.0-liters and will incorporate BMW's new tri-turbo technology with a horsepower figure of approximately 450 HP (331 kW / 444 bhp).

The new BMW M4 is expected to be unveiled in 2014.

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BMW M4 latest speculative rendering