Adam Simson reviews the BMW M4 Convertible
BMW have just released images and specifications of the new M4 Convertible. It sounds odd saying that – I think we’ll get used to the new model numbering eventually, though.
First things first, it is a much better looking car than the E92 M3 Convertible. It seems better proportioned and has more handsome lines. I think the colour of the car in the photographs is very flattering, mind you.
The M4 Convertible will go on sale in the United Kingdom on the 6th September 2014, priced at £60, 730. Standard equipment includes; Adaptive M suspension, 19″ M light alloy wheels, BMW Professional media package with upgraded Bluetooth and USB, front and rear parking sensors, folding door mirrors and heated front seats.
BMW have retained the distinguishing M features such as the power-bulge in the long bonnet, the sculpted front apron, flared wheel arches, M side gills, and polished quad exhaust tailpipes.
A new three-part folding metal roof significantly improves noise insulation in the cabin over the M3 Convertible thanks to a new headlining, creating greater comfort and warmth. It takes 20 seconds to fully fold away and give you total enjoyment of top-down motoring. Available as an option for those fresher autumn and winter days, is a three-stage Air Collar neck warming system in the front seats.
BMW have discontinued the 4.0 litre V8 from the E92 M3. Instead, they have gone back to their roots and developed a new 3.0 litre, twin-turbo, high-revving, six cylinder. It develops 431 hp and 406 lbs ft of torque delivered up until 7,300 rpm, where the redline sits at 7,500 rpm. 0-62 mph is reached in 4.6 seconds with the six-speed manual gearbox (standard) or 4.4 seconds for the (£2,645) optional M Double Clutch Transmission. The DCT gearbox incorporates launch control in order to achieve the fastest possible acceleration from standstill.
The BMW M cars haven’t just been more powerful than regular series, but dynamically enhanced, too. This is the first time electro-mechanical steering has made its appearance on M cars, but BMW claim it will maximise precision, response, and assistance. The driver is of course, able to tailor the way the car responds via driving modes; Comfort, Sport, and Sport +. Carbon ceramic brakes are standard on the M4 Convertible, likewise with the new M3 and M4 Coupé respectively.
An Active M Differential enhances traction and directional stability, most significant when going hard on the power out of corners. A limited slip differential, linked with the Dynamic Stability Control, asses throttle position, wheel rotation speed, and yaw angle in order to determine how much rear axle lock is needed – up to 100%.
The M4 Convertible is about 60 kg lighter than its predecessor thanks to an aluminium bonnet, front wings and many chassis components. Carbon-fibre reinforced plastic is used for the propeller shaft and strut brace in the engine bay for added rigidity. All of this contributes to a kerb weight of 1,750 kg.
It certainly looks the part, and being able to fold away the roof makes the distinctive M sound more audible through the signature quad exhausts.