Another prototype for the upcoming 2015 BMW M4 convertible was spied out testing, this time in snowy Scandinavia. With just a few patches of camouflage obscuring the performance convertible’s hood, lower front intakes, front fenders, side skirts, side mirrors, and rear bumper, this is our best look yet at the drop-top M4.
Most importantly, the BMW M4 convertible’s power-retractable hardtop is fully exposed. We can clearly see where the roof’s joints fold, and how the overall assembly meets the trunk, where it will likely be stored when folded down. The rest of the BMW M4 convertible is consistent with the M4 coupe that we saw at the 2014 Detroit auto show, although this prototype has large blue-painted calipers attached to its drilled brake rotors. Matte-black paint is the only other significant distinguishing feature, creating a fine brushed-metal look that could be just for testing, or may potentially make it to production as an optional exterior color.
The 2015 BMW M4 convertible is expected to receive the same 425-hp turbocharged 3.0-liter inline-six as in the M4 coupe, although its curb weight will almost certainly be greater due to the folding hardtop assembly. The M4 coupe weighs in at a relatively spritely 3300 pounds, thanks in part to its lightweight carbon fiber roof construction — an element that will not carry over to the M4 convertible. Expect a 0-60 mph sprint time slightly higher than the M4 coupe’s 3.9-second figure, when equipped with the seven-speed dual-clutch automatic transmission. A six-speed manual gearbox will also be offered for the car’s enthusiast consumer base.
BMW has yet to announce a specific release date for the M4 convertible, but it will arrive sometime after the BMW M4 coupe and M3 sedan in the early part of summer 2014. It could debut publicly as soon as the New York auto show in April.