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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.

BMW Hack: the auto industry's big cyber-security warning sign [w/video]

A cyber-security hole that left more than two million BMWs vulnerable may be the most serious breach the auto industry has faced in its emerging fight against car hackers. Security experts are not only concerned that researchers found weaknesses inside the company's Connected Drive remote-services system. They're worried about how the hackers gained entry. German researchers spoofed a cell-phone station and sent fake messages to a SIM card within a BMW's telematics system. Once inside, they locked and unlocked car doors. Other researchers have demonstrated it's possible to hack into a car and control its critical functions, but what separates this latest exploit from others is that it was conducted remotely. In an industry that's just coming to grips with the security threats posed by connectivity in cars, the possibility of a remote breach has been an ominous prospect. The fact it has now occurred may mean a landmark threshold has been crossed. "It's as close as I've seen to a genuine, remote attack on telematics," said Mike Parris, head of the secure car division at SBD, a UK-based automotive technology consulting company. "At this point, the OEMs are trying to play a game of catch up." Previous researchers in the automotive cyber-security field have launched remote attacks that are similar in nature, though not the same. In 2010, academics at California-San Diego and the University of Washington demonstrated they could remotely control essential functions of a car, but they needed to be within close proximity of the vehicle. In November 2014, researchers at Argus Cyber Security remotely hacked cars with an aftermarket device called a Zubie plugged into their diagnostic ports. But the remote attack was predicated on the Zubie dongle having physically been installed in the car. With the BMW hack, researchers compromised the car without needing physical access or proximity. The German Automobile Association, whose researchers conducted the BMW study, said it infiltrated the system "within minutes" and left undetected, a feat that raises the possibility that a hacker could do the same in a real-world scenario. Messages Were Sent Unencrypted Security analysts described the BMW infiltration as a "man in the middle" attack. Researchers mimicked a cellular base station and captured traffic between the car and the BMW Connected Drive service, which drivers can access and control via an app on their cell phones.

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.