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BMW M4 Convertible spied with naked top and trunk

Our trusty spy photographers have been at it again, snagging these first images of the forthcoming BMW M4 Convertible without camouflage on its retractable roof and rear deck. You'll recall that this is not the first time we've seen the followup to the M3 Convertible, but that the last batch of images we had were encumbered by a lot more camouflage - this car is virtually naked by comparison.
Not surprisingly, the M4 looks to share its folding hardtop design with the standard 4 Series droptop, and it should operate in a similar manner as well. It's no surprise, but it looks like BMW is going to try and make the transition from M4 Coupe to M4 Convertible as effortless as previous efforts converting the M3 to an M3 Convertible. That should mean that below the beltline, this car is nearly identical to the coupe we saw in Detroit.
As for the camo'd features on these spy photos, the hood, front fascia, rear fascia, quarter panels, side sills and mirrors have all been shown on the M4 Coupe, and don't really bear mentioning. There's been no word of just where the M4 Convertible will make its debut, although considering the lack of disguise on this car, Geneva seems like a likely destination.

BMW M3 and M4 will rock 430 hp from twin-turbo six with standard manual [w/video]

We're not sure which spec we're most intrigued by for the new BMW M3 and M4: the twin-turbo six-cylinder with 430 horsepower and "far beyond" 369 pound-feet of torque, the 3,300-pound curb weight or the standard six-speed manual transmission with automatic throttle blipping on downshifts. That engine is fitted with both Valvetronic and Double-Vanos, twin-wire arc-spray coating in the cylinders instead of liners to save weight, a track-ready cooling system with additional radiators, a forged crankshaft, dry-sump lubrication and a magnesium oil sump. BMW says its "high revving concept" has a redline beyond 7,500 rpm.
In the M4, it will be pulling a coupe with "a weight of just under 1,500 kilograms," which is 3,300 pounds to you and me. That number is said to include no driver and 90 percent fuel, but we're still waiting on the exact number and specs. BMW says it's "around 80 kilograms lighter than a comparably equipped predecessor model," putting the power-to-weight ratio at something like 7.68 pounds per horsepower at the same time as it helps reduce fuel consumption by 25 percent. The use of carbon fiber reinforced plastics (CFRP) for the roof, drive shaft (with no center bearing), trunk and front strut brace, and forged aluminum for suspension components, have aided in the weight loss. This time around, the sedan - the M3 - will also get a CFRP roof.
The default option will be a six-speed manual.

BMW 6 Series Convertible gets a little work done for 2015

Truth be told, I've never really found the modern BMW 6 Series to be a particularly attractive car, in Coupe, Convertible, or sedan Gran Coupe forms. This current generation certainly looks a whole lot better than the Bangle-fied Six that came before it to my eyes, but on the whole, I find much of the car's design to be fussy and awkward. There's a new 6 Series on the way, scheduled to arrive sometime in 2017 or 2018, but to hold us over until then, BMW is freshening its current range, as evidenced by this convertible prototype our trusty spies recently caught testing.
Will the changes to the current 6 Series be an improvement? Perhaps. Up front, there are restyled headlamps and a new front bumper, and at the rear, BMW has redesigned the LED taillamps to bring them more in line with the rest of the company's offerings. Aside from those modest tweaks, we don't expect much more to change on the Big Six - the interior will likely carry over with some minor tweaks (or new colors), and it's possible the powertrains could be massaged gently for gains in either power, efficiency, or both.
Whether you think this new look is pretty or not, this freshened 6 Series will likely debut sometime next year, while BMW's engineers and designers craft the all-new version. See it from several angles in our gallery, above.