In gearing up for the UK launch of the BMW i8, the German automaker released this brief video in which we hear the aural road of the i8's 3 cylinder engine.

Of note is that the i8's three cylinder doesn't actually make this swell noise, but rather it's the result of BMW's Active Sound Design, which enhances the i8's roar both inside and outside of the cabin.

Interestingly, the left exhaust pipe is a dummy pipe that acts as an external speaker for exterior sound projection. Clearly, BMW went to great lengths to try to make the i8 sound like a hot rod, when it fact money would have been better spent (in our opinion) adding more battery to increase electric range.

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