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Car news | 12.04.2014 - 16:36

The new BMW M4 Convertible with Lower Weight, Concave Wheels, and Inline-Six

BMW is looking to make a statement at the New York International Auto Show with the new M4 Convertible. The new convertible model features a number of weight saving measures such as forged concave wheels and all the power from the M3 and M4 models.

The convertible has always been an important model in the BMW M3 line throughout its history. It offers up almost the same performance as the coupe with that open air experience that makes driving more enjoyable on warm summer days. Now that the BMW M3 and M4 have split into the sedan and coupe, respectively, the BMW M3 Convertible lives on in the new 2015 BMW M4 Convertible. The new model is set to make its debut at the 2014 New York International Auto Show and will carry on the performance flag for the now extinct M3 Convertible. The new model features all sorts of weight saving measures along with all the performance goodies found in the new M3 and M4 models such as the turbocharged inline-six engine, concave wheels, and drivetrain components.


One of the most intriguing aspects about the new BMW M4 Convertible is the automaker’s switch from the naturally aspirated V-8 that powered the model prior to the new twin-turbocharged inline-six cylinder engine displacing 3.0 liters. The engine is powerful and efficient. It sends a total of 425 horsepower from 5,500 to 7,300 RPM and 406 lb-ft. from 1,850 to 5,500 RPM to each of the rear concave wheels through either a six-speed manual or seven-speed dual clutch DCT transmission. Armed with the manual, the BMW M4 Convertible is capable of reaching 62 mph in just 4.4 seconds while the DCT-equipped models can do the same feat in just 4.2 seconds.


All this power required the suspension and drivetrain to be beefed up. Ensuring that traction is at its best for both of the rear concave wheels is an M Active differential as standard equipment. The available adaptive M suspension helps to keep things sharp at all times and automatically adjusts based on a number of parameters and driver selections to provide the best ride quality at all times. Behind the dark finished concave wheels is a new set of BMW M compound brakes as standard. If needed, customers can order the potent BMW M carbon ceramic brakes with gold painted calipers that stop even harder without fade.


BMW was able to keep the weight of the new M4 Convertible down to just 4,055 lbs. thanks to a number of weight saving measures. The front fenders and hood are made from lightweight aluminum while other aspects of the car are constructed of Carbon Fiber Reinforced Plastic (CFRP) to save weight. The hard-top convertible can be retracted in just 22 seconds at speeds up to 11 mph and weighs less than the previous model. The convertible top features a new design and material that helps reduce noise by two decibels compared to the previous generation. The wind deflector has also been redesigned to reduce noise as well.


From the concave wheels to the convertible top, the new BMW M4 Convertible is an open-top driver’s sports car. 

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