Like with North American examples of the coupe, the only available model of the convertible will be the M850i xDrive.
Two model variants will make it to showroom - a BMW M850i xDrive convertible that's powered by a V8 engine (530bhp) and the BMW 840d xDrive convertible which uses a six-cylinder in-line 320bhp diesel engine. An eight-speed automatic will shuffle the power to both axles, as necessary. This is able to cover the 0-100km/h sprint in just 3.9 seconds. Acceleration from 0 - 100 kmph takes 5.2 seconds and the top speed is limited to 250 kmph. The standard seats are heated, but buyers can upgrade to ones that are also ventilated.
The V8 engine works in tandem with a next-generation 8-speed Steptronic Sport transmission that boasts a wider gear ratio spread; paddle shifters are mounted on the steering wheel. I miss the long, flowing C pillar of the coupe, but think the convertible looks great in profile, especially with the top up. When the roof is down, it stows underneath a rear deck that features stitching to match the instrument panel and door panels.
A plastic wind deflector similar to that already seen on 6 Series convertibles can be erected to reduce wind buffeting when the roof is down, although it requires the rear seats of the 8 Series convertible to be unoccupied.
The four-seater cabriolet has a soft-top roof with fully electric operation, opening and closing at the touch of a button and when traveling at up to 50km/h (31mph). Optional neck warmers, which feature air outlets in the seats, are available for those cooler nights. For example, an optional M Carbon Exterior Package uses carbon-fiber reinforced polymer pieces for the air intake bars, exterior mirror caps, and rear diffuser insert. Furthermore, the Bowers & Wilkins Diamond surround sound system adds to the open-air music experience which audiophiles can revel over.