BMW has unveiled the new 4 Series Coupé ahead of its public debut at the IAA Frankfurt Motor Show in September.

Looking almost identical to the concept that was first seen at the end of last year, the design of the 4 Series is characterised by long, low and broad proportions. It’s also noticeably larger than its 3 Series Coupé predecessor, a move that handily creates a little extra space in the range for the forthcoming 2 Series.

BMW 4 Series Coupé M Sport (2014) Front Side

2014 BMW 4 Series Coupé. Scroll down for more images.

For the UK, the line-up is going to comprise five trim grades: SE, Sport, Modern, Luxury and M Sport. From launch, 428i, 435i and 420d variants will be offered, all of which feature turbocharged, direct-injection, Euro6-compliant engines. Shortly afterwards, they are due to be joined by the 420i, 430d and 435d:

2014 BMW 4 Series Coupé - Technical Specifications
Petrol Models
Model	420i	420i xDrive	428i	435i
Engine	2.0 litre four-cylinder		2.0 litre four-cylinder	3.0 litre six-cylinder
Power	181 bhp (135 kW / 184 PS)		241 bhp (180 kW / 245 PS)	301 bhp (225 kW / 306 PS)
Torque	270 Nm (199 lb/ft)		350 Nm (258 lb/ft)	400 Nm (295 lb/ft)
Transmission	Six-speed manual*
Driven wheels	Rear	All	Rear	Rear
0-62 mph (100 km/h)	TBC	TBC	5.9 secs	5.4 secs
Top speed	TBC	TBC	155 mph (250 km/h)	155 mph (250 km/h)
Combined cycle	TBC	TBC	42.8 mpg (6.6 l/100km)	35.8 mpg (7.9 l/100km)
CO2 emissions	TBC	TBC	154 g/km	185 g/km
Diesel Models
Model	420d	420d xDrive	430d	435d xDrive
Engine	2.0 litre four-cylinder		3.0 litre six-cylinder	3.0 litre six-cylinder
Power	181 bhp (135 kW / 184 PS)		254 bhp (190 kW / 258 PS)	308 bhp (230 kW / 313 PS)
Torque	380 Nm (280 lb/ft)		560 Nm (413 lb/ft)	630 Nm (464 lb/ft)
Transmission	Six-speed manual*		Eight-speed automatic
Driven wheels	Rear	All	Rear	All
0-62 mph (100 km/h)	7.5 secs	TBC	TBC	TBC
Top speed	149 mph (240 km/h)	TBC	TBC	TBC
Combined cycle	60.1 mpg (4.7 l/100km)	TBC	TBC	TBC
CO2 emissions	124 g/km	TBC	TBC	TBC
* Eight-speed automatic optional.

Standard equipment levels are - perhaps surprisingly - set to be fairly generous. All versions will come as standard with xenon headlights, automatic lights and wipers activation, cruise control, Bluetooth and USB connectivity, a digital radio, heated front seats, leather upholstery and the Drive Performance Control driving mode selector.

UK sales of the BMW 4 Series Coupé begin in October, with prices starting from £31,575.