The next generation BMW M3 won't be showing its face until the 2013 Paris Auto Show, but we'll at least get to see it undergo its painstaking testing until that happens. Bimmerpost was able to capture the future sports sedan as it endured the hot weather in Spain.

The video shows a little more of the M3's->ke2366 exterior, but our main focus as we watched it was the sound pouring out of what we suspect is the new inline-six cylinder engine. We believe the previous V8 engine has been dropped in favor of the new V6, but we are still unaware of whether the new engine will be equipped with two or three turbos. Either way, it will boast of 450 HP, an increase over the current model's 420 HP.

The future BMW M3 will be offered exclusively as a sedan and will show up on US dealerships in the winter of 2014. Before that, we'll be able to get a closer look at the future model when BMW->ke178 unveils its M3 Concept at the 2013 Geneva Motor Show.

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