The folding speed of the convertible is about to be completed in 314% of the top lifting speed, which will be replaced in 18 mph. Of course, a lot of people may say that the hard top can cope with bad weather better, but BMW says its new soft top can do the same. < / P > < p > the roof is available in two colors: black and moonlight black metallic. According to BMW, the latter will have a beautiful shimmer, especially in direct sunlight. The soft top is also good for roof space, with BMW claiming that the 4-series convertible has 0.2 inches more roof space than the outgoing hardtop version. < / P > < p > in addition, there is a slight increase in the luggage compartment space, with the roof open, to 9.0 cubic feet – 1.2 cubic feet more than the hardtop. < / P > < p > in terms of size, the new 4-series convertible is 5.2 inches longer, 1.0 inches wider and 0.1 inches higher than the old model. It also has a wider front wheel and a 1.6-inch wheelbase. The double kidney grille is a new design. The M Sport Kit offers a new front bumper and high gloss binding. < / P > < p > the 2021 BMW 4-series convertible is equipped with a turbocharged four cylinder engine or an in-line six cylinder engine. The 430I and 430I xDrive convertible is a 2.0-liter four cylinder dual power engine that delivers 255 horsepower and 295 LB ft of torque. The engine allows the car to complete 100 km acceleration in 5.9 seconds, with a maximum speed of 130-150 mph depending on the combination of wheels and tires. < / P > < p > at the same time, the m440i and m440i xDrive convertible are equipped with a 3.0-liter in-line six cylinder turbocharged engine that can deliver 382 horsepower and 369 LB ft of torque, as well as a 48V mild hybrid system. BMW said that with a larger engine, the car’s 100 km acceleration time is reduced to 5.0 seconds, and the maximum speed can reach 130-155 mph. It’s not as fast and powerful as the BMW M4, but it’s very close. < / P > < p > both variants use an 8-speed automatic transmission and a new sprint feature. The latter will automatically activate sport driving mode when the driver pulls the left shifter, where the transmission will switch to the lowest possible gear to provide maximum acceleration. < / P > < p > as for the interior of the car, the 2021 BMW 4-series convertible is the same as the 4-series coupe: an 8.8-inch infotainment touch screen and a 5.1-inch metering display screen, both of which are driven by BMW’s iDrive 7, with standard BMW maps and BMW intelligent personal assistant system. Live cockpit professional, with a 12.3-inch digital instrument console and a larger 10.25-inch touch screen, is optional. < / P > < p > the 430I and 430I xdrives come standard with 18 inch wheels, sports leather steering wheel, mirror camera, LED headlights, automatic cruise control and auto high beam. The m440i and m440i xdrives add M Sport brake with blue calipers, an M Sport differential, variable sport steering, rear spoiler and aerodynamic body exterior kits. < p > < p > Apple Carplay and Android auto are standard on all models, and both are equipped with a large number of advanced driving AIDS, including lane departure warning, frontal collision warning, automatic high beam, rear cross traffic warning and blind spot detection. < / P > < p > it is reported that the 2021 BMW 4-series convertible will be launched in March 2021, while the xDrive full drive version will wait until July next year. The 430I starts at $53100 and the 430I xDrive convertible starts at $55100. The m440i convertible starts at $64000, while the m440i xDrive starts at $66000 – plus a shipping fee of $995. SpaceX beat blue origin and Northrop Grumman to win a $316 million air force contract