BMW M4 REVEALED
As with those two beasts, the new M4 Convertible is powered by BMW’s turbocharged in-line petrol six, producing 317kW at 5500rpm and 550Nm of torque between 1850-5500rpm.
That’s a handy boost, especially on the torque front: in its previous M3 form, the performer was powered by a 4.0 litre V8 offering 309kW and 400Nm.
The M4 Convertible also enters above the top model in the regular 4 Series range, the 435i, which gets a 225kW and 400Nm turbo six.
In its new 4-badged form, the new M-powered Convertible boasts a 0-100km/h time of just 4.4 seconds when mated to the optional seven-speed M dual-clutch auto. (4.6 with the manual.)
That’s a quick sprint, falling short of the coupe’s time by just 0.3 seconds.
Like the hardtop models, the Convertible’s top speed is listed at an electronically limited 250km/h.
Fuel consumption in the new M4 Convertible is listed at 9.1 l/100km with the six-speed manual, and 8.7 with the auto.
As with the 4 Series Convertible, the M4 Convertible gets a three-section metal folding roof, opening in under 20 seconds at speeds up to 18km/h.
Like the M4 Coupe and M3 Sedan, the M4 Convertible benefits from a number of chassis enhancements and weight reduction tricks, including the use of aluminium for the bonnet and side panels, and in a number of components beneath the skin.
Likewise, the driveshaft uses carbon fibre reinforced plastics in its one-piece construction, reducing weight and the number of rotating masses.
In all, the M4 Convertible lists a kerb weight of 1750kg - not light, but because of their additional structural support, convertibles rarely are. Still, it’s also around 60kg lighter than its predecessor, and that’s no mean feat.
Watch for the M4 Convertible to make its world premiere at the New York Auto Show later this month.
Speaking with TMR today, BMW Australia’s Lenore Fletcher said that while the hardtop M4 and M3 models will arrive in the next few months, the M4 Convertible will appear either in late 2014 or early in 2015.