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BMW M4 spied in coupe and convertible form

From the sound of it, we'll have to wait until the Detroit Auto Show to see the production version of the BMW M4, but spy shots show the new hi-po BMW testing recently in both coupe and convertible form. Showing a lot more skin than recent spy shots, these M4 prototypes look very similar to the M4 Concept we saw at Pebble Beach.
Carryovers from the concept car include the funky mirrors, bulging hood and the slotted front fascia vents, but the rear fascia seems to be missing the added flair of the concept and, as expected, the carbon fiber front splitter and exhaust tips are also missing from these M4s. Like the current M3 Convertible, the drop-top version of the M4 will utilize a retractable hard top.

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.

BMW i8 fully revealed ahead of Frankfurt debut

It may be early in the morning here in the US, but in Germany, the first day of the 2013 Frankfurt Motor Show is in full swing. BMW took advantage of the early start and showed off its long-awaited i8 plug-in hybrid sportscar, a two-plus-two, swan-wing-doored coupe, to the Frankfurt crowd.
We drove a BMW i8 prototype back in August, so many of the things we're reading today are clarifications on our initial suspicions or speculations. Underhood sits a 1.5-liter, turbocharged, three-cylinder engine. On its own, it churns out a respectable 231 horsepower and 236 pound-feet of torque, which is then channeled to the rear wheels by way of a six-speed automatic transmission. An electric motor, meanwhile, sends 131 hp and 184 lb-ft of torque through a two-speed automatic to the front wheels.
With all-wheel drive at its disposal, the total system power sits at 362 hp and 320 lb-ft of torque, and allows the i8 to scamper to 62 miles per hour in just 4.4 seconds. That excellent performance is offset by an estimated fuel economy figure of 94 miles per gallon, though, making this a fast and efficient vehicle. Charging is impressively fast on the i8, with a full charge coming from a 110-volt outlet in under four hours. A BMW Charging Station will trim the charge time down to 1.5 hours.