Mike Stevens | Dec 6, 2012

Here it is, the long-rumoured 4 Series Coupe. Sure, the badge says it's a concept, but as with the Gran Coupe 'concept' that smoothly morphed into the new 6 Series, we all know better.

BMW isn't pretending otherwise, either. The German carmaker describes the "Concept 4 Series Coupe" as the fourth generation of its popular midsized coupe range.

Never short of a superlative, BMW says it will "reassert its global leadership credentials" with this new model line, the number 4 becoming "market shorthand for aesthetic and dynamic appeal".

In the new 4 Series, BMW continues the themes set out by its E92 predecessor, with the same long bonnet, low swooping glasshouse and short rear deck formula that has made the 3 Series Coupe a strong seller for the prestige marque.

The unveiling of the 4 Series Coupe also quashes rumours the new model would bring a markedly different design to the regular 3 Series range.

Like the 3 Series GT spied this week, the 4 Coupe remains loyal to the style of the 3 Sedan, featuring the same connected grille and headlights design but adding a few tweaks of its own.

There's aggressive new bumpers at both ends, deep side skirts, smoothed-out tail-lights and, as with the GT hatch, a hooked brake vent behind the front wheel arches.

The 4 is also noteably larger than its predecessor, measuring nearly 30mm longer and 44mm wider, while sitting on a 50mm longer wheelbase.

In all, the Coupe measures 4641mm long, 1826mm wide and 1362mm tall - 16mm shorter top-to-bottom than the 3 Coupe. it also boasts a wider track, larger by 45mm at the front (1545mm) and a whopping 80mm at the rear (1593mm).

As for engines, BMW isn't saying - but it is likely that, like the 3 sedan, we can expect a run of turbocharged four-cylinder options and a top-shelf 435i six-cylinder model.

An M4-badged hero should also replace the current M3 Coupe, driven by a twin-turbo six-cylinder engine that would replace the current 309kW V8 engine.

A debut for the production version of the 4 Series Coupe is still to be confirmed, but we expect an unveiling at next year's Frankfurt Motor Show.

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