BMW will introduce a new four-seat coupé in 2013 to compete with the Audi A5 and Mercedes-Benz C-Class Coupé.

The BMW Concept 4 Series Coupé, revealed this week, suggests the production version of the 4 Series Coupe will attempt to stand out more from the 3 Series, with which it will share many of its components.

The wheelbase (2,810mm) is 50mm longer than that of the existing 3 Series Coupé, while 45mm has been added to the front track (1,545mm) and 80mm to the rear track (1,593mm). At 1,826mm wide, the BMW Concept 4 Series Coupé is 44mm wider than its predecessor, its roof line is 16mm lower (1,362mm) and it is also longer at 4,641 mm.

The model appears close to how a production version would look, despite being a concept car, and more details are expected closer to the car's launch date. A 4 Series Convertble is expected to follow.

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