BMW has announced its new 4 Series is set to be unveiled to the masses at next year's North American International Auto Show in Detroit that will take place in January.

The vehicle manufacturer has streamlined the aesthetics of this latest incarnation of the model, lowering the chassis by 67 mm and lengthening the body to create a sportier, more aggressive appearance.

In addition, the design team has implemented a number of aerodynamic innovations, including wheel arch air vents and intakes in the bumper, to boost fuel efficiency for the new model.

BMW designer Adrian van Hooydonk told Piston Heads: "Efficient Dynamics can be an abstract notion, so we as designers can give it form, and our contribution to the need to reduce CO2 is in aerodynamics."

The news follows the recent unveiling of the BMW i3 coupe concept at the Los Angeles Auto Show, with crowds impressed by the vehicle's excellent performance stats, despite it being a full-electric car.

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