The new BMW M4 convertible will be unveiled at the 2014 New York Auto Show.

The new four-seat open-top is the third car in a new generation of turbocharged six-cylinder M division models.

The M4 convertible follows the M3 sedan and M4 coupé that were shown at the Detroit motor show back in January.

The basis for the latest M4 is the recently introduced 4-series convertible. The new car receives a series of traditional styling changes, including a more heavily structured front bumper with larger cooling ducts for the engine and front brakes.

The M4 convertible also gets an altered kidney grille treatment, more heavily contoured bonnet, wider front fenders with integrated air breather elements to smooth airflow through the front wheel houses, new exterior mirror housings

At 4670mm in length, 1870mm in width and 1386mm in height, the new car is 56mm longer, 65mm wider and a scant 4mm lower than its predecessor, the old M3 convertible.

It also rides on a larger chassis whose 2812mm wheelbase and 1579mm front and 1693mm rear tracks are up by respective 52mm, 39mm and 63mm.

Like all current BMW coupés and convertibles, the M4 gets a central console similar to its sedan counterpart (the M3), but with a sportier, more driver-focussed design.

The tail-lamps too resemble that of the M3, but are slimmer and wider. The characteristic M-Division quad tail-pipes remain though.