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BMW M4 Convertible poised for Goodwood unveil

It shouldn't be a shock that BMW is working on a convertible version of the M4. Not only have we caught it testing twice, but this is an automaker that seems willing to build a vehicle for nearly every buyer's needs. Evo claims that the high-performance droptop is going to debut at this year's Goodwood Festival of Speed in England from June 26-29.
Judging from the spy shots we've seen, the M4 Convertible will consist of a retractable hard top like the 4 Series cabrio. Other than the roof, there aren't expected to be many changes from the coupe. The engine will be the same turbocharged, 3.0-liter inline six-cylinder engine, but the added weight of the roof and its mechanism may take a small bite out of performance.
We spoke to BMW USA about the rumor and were told that it has no comment at this time. After the M4 Convertible, Evo claims that BMW is working on a M4 Gran Coupe. How that would be all that different from an M3, isn't exactly clear.

2014 BMW 4 Series Coupe officially debuts, priced from $41,425*

Well, that didn't take long. Less than two hours after the first images of the 2014 BMW 4 Series Coupe leaked onto the Internet, we've been given the go-ahead to publish the whole kit and caboodle. And while we won't say we told you so, it looks as though the car's official details are standing true to our earlier predictions.
In other words, BMW will offer the 4 Series in 428i and 435i models, both of which can be had with xDrive all-wheel drive. Just like in the 3 Series, the 428i is powered by a 2.0-liter turbocharged inline four-cylinder engine, good for 240 horsepower and 255 pound-feet of torque, and the 435i gets BMW's turbocharged 3.0-liter inline-six making 300 hp and 300 lb-ft. In three of the four models, both a six-speed manual and eight-speed automatic transmission are available; the 428i xDrive can only be had with the auto 'box. The 428i (with rear-wheel drive, we assume) can hit 60 miles per hour in 5.7 seconds (though BMW doesn't specify with which transmission), and the 435i will do that same sprint in 5.3 seconds with the manual and five seconds flat with the eight-speed auto.
We've already dissected the 4 Series' visuals, but the numbers show just how different it is from the 3 Series sedan. The 4 Coupe is one-tenth of an inch longer overall, while riding on the same 110.6-inch wheelbase, is 0.6 inches wider, and has a roofline that's a full 2.7 inches closer to the ground. It looks sleek, incorporating BMW's new design language from the 3 Series with an overall profile that's similar to the larger 6 Series coupe.

Researchers halfway to cutting carbon fiber costs by 90%

Carbon fiber has been utilized for decades to build racecars, as a means to cut weight while maintaining strength. But until recently, the space-age material has been largely absent from the street on anything but supercars because of the expense to use it. Recently, BMW signaled a major shift in that trend when it starting using carbon fiber reinforced plastic panels on the i3 and i8. This relatively small scale start might be just the beginning; the German company believes that a breakthrough to inexpensively manufacture the lightweight stuff is just on the horizon.
MAI Carbon Cluster Management GmbH counts BMW, Audi, Airbus, the German government and many other organizations as supporters, and it's researching how to make carbon fiber cheaper to produce, according to Automotive News Europe. The company thinks it can reduce costs by 90 percent in the near future. "We've certainly reached a halfway point on our cost-cutting target for suitable carbon-fiber parts," said project head Klaus Drechsler to Automotive News Europe.
Unfortunately, it isn't entirely clear just what MAI Carbon is doing to make such a huge leap possible. However, a recent post on the company's website talks about a new form a carbon fiber using a thermoplastic matrix that could be cured in less than three minutes. That's compared to about 90 minutes in the traditional process with an autoclave.