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2015 BMW M4 Convertible will give the best bad hair days

BMW officially unveiled the 2015 M4 Convertible at the Javits Center in New York this morning. The droptop, which will slot in next to the M4 Coupe in BMW's performance line, offers infinitely more headroom, fresh air and sunshine for those that want a little more great outdoors and tousled hair with their M experience.
Visually, the M4 convertible is similar to the coupe, and carries on the hardtop's athletic stance with a long wheelbase, short front overhang, aerodynamic mirrors and in the case of this showcar, optional yellow-painted brake calipers. The car's expressive, angry face is perhaps the most notable aspect of its styling, screaming "get the hell out of my way!" with its signature twin-bar kidney grille, trio of air intakes and squinty LED headlights. Inside, the convertible employs three-temperature neck warmers (for chilly top-down days), an absurd amount of "M" logos and a wealth of luxury and technology features.
The rear-wheel-drive convertible uses the same engine as the coupe: a high-revving, twin-turbocharged 3.0-liter inline six producing 425 horsepower and 406 pound-feet of torque, mated to either a six-speed manual or a seven-speed M dual-clutch transmission. BMW says the car can make a 0-60 sprint in just 4.4 seconds when equipped with the manual.

Refreshed BMW 6 Series sports an understated redesign in Detroit [w/video]

BMW is keeping its refresh for the 2015 6 Series family very subtle. The tweaks amount to an understated nose job for the luxury models and some new standard tech, as well. The Bavarian brand is definitely not going too far with this redesign for the vehicles, and they even remain mechanically the same. The most obvious change for the latest 6 Series models is the sharpened front end. BMW explains that the grille now features nine slats, rather than ten. Clearly, this is a major change in design. The lower air dam is slightly reworked to accentuate the vehicles' width, and, in addition, the four-door benefits from a tweaked window surround with the Gran Coupe name embossed near the rear doors. All versions also get standard full-LED headlights. Inside, there's high-gloss black trim covering the center and LEDs illuminating portions of the interior. Beyond these minor alterations, BMW is offering two new options packs for the family that tweak the looks. While the company doesn't have any earth-shattering changes in store, they are there. Try to spot the changes in the refreshed 6 Series models as they sit on the floor of the 2015 Detroit Auto Show. The new BMW 6 Series: Three Body Styles Rejuvenated and Ready to Take on the Competition Woodcliff Lake, N.J. - December 10, 2014 6:00pm EST/3:00pm PST... Through three generations, the BMW 6 Series has defined that unique blend of style and elegance with the performance and handling that one would expect of The Ultimate Driving MachineTM. For the 2015 model year the third-generation of BMW 6 Series receives a range of enhancements that refine the character that is unique to the 6 Series. Now offered in three distinct body styles – traditional two-door Coupe, open-air Convertible and unique four-door Gran Coupe – all three are again offered with a choice of BMW TwinPower Turbo engines, the 315 horsepower inline-six in the 640i models and the 445 horsepower V8 in the 650i models. Sitting at the top of the 6 Series range, in terms power and performance, is the BMW M6 with its 560 horsepower M TwinPower Turbo V8, again available in all three body styles. The 2015 BMW 6 Series will make its world debut at the North American International Auto Show and arrives in US showrooms in the first quarter of 2015. Sports performance and luxury – a combination rich in tradition. The new BMW 6 Series model range follows in a BMW tradition of legendary dream cars which now stretches back more than 75 years.

Is the skill of rev matching being lost to computers?

If the ability to drive a vehicle equipped with a manual gearbox is becoming a lost art, then the skill of being able to match revs on downshifts is the stuff they would teach at the automotive equivalent of the Shaolin Temple. The usefulness of rev matching in street driving is limited most of the time – aside from sounding cool and impressing your friends. But out on a race track or the occasional fast, windy road, its benefits are abundantly clear. While in motion, the engine speed and wheel speed of a vehicle with a manual transmission are kept in sync when the clutch is engaged (i.e. when the clutch pedal is not being pressed down). However, when changing gear, that mechanical link is severed briefly, and the synchronization between the motor and wheels is broken. When upshifting during acceleration, this isn't much of an issue, as there's typically not a huge disparity between engine speed and wheel speed as a car accelerates. Rev-matching downshifts is the stuff they would teach at the automotive equivalent of the Shaolin Temple. But when slowing down and downshifting – as you might do when approaching a corner at a high rate of speed – that gap of time caused by the disengagement of the clutch from the engine causes the revs to drop. Without bringing up the revs somehow to help the engine speed match the wheel speed in the gear you're about to use, you'll typically get a sudden jolt when re-engaging the clutch as physics brings everything back into sync. That jolt can be a big problem when you're moving along swiftly, causing instability or even a loss of traction, particularly in rear-wheel-drive cars. So the point of rev matching is to blip the throttle simultaneously as you downshift gears in order to bring the engine speed to a closer match with the wheel speed before you re-engage the clutch in that lower gear, in turn providing a much smoother downshift. When braking is thrown in, you get heel-toe downshifting, which involves some dexterity to use all three pedals at the same time with just two feet – clutch in, slow the car while revving, clutch out. However, even if you're aware of heel-toe technique and the basic elements of how to perform a rev match, perfecting it to the point of making it useful can be difficult.