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BMW X4 hatches its fastback shape in Shanghai

The day has finally come for BMW to pull the covers off its X4 Concept at the Shanghai Motor Show. The machine brings few surprises - we've already seen an official image gallery from the German automaker, so its exterior shape was well known - but at least now we get to see it with our own eyes, and with the lenses of our very own cameras.
You can clearly see the fastback roofline in our high-res image gallery above, along with the jacked-up stance that allows BMW to call this machine a Sports Activity Vehicle, which basically means "Crossover" to our friends in Munich. We've seen similar vehicle shapes before, most notably in the form of the BMW X6, but also as far back as the 1980s from the likes of AMC.
We fully expect the transition from concept to production to be pretty seamless, so what we see here is, for the most part, what we'll see on the showroom floor in 2014. Feel free to peruse the press release below, but first, be sure to browse through our live images from Shanghai and let us know what you think.

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.

A closer look at the 2015 BMW M3 and M4

It's fair to say we're going to miss the E92 BMW M3. Its high-revving V8, flame-styled looks and excellent driving character made it quite simply one of the best cars of the 2000s. Its replacements, the new M3 Sedan and M4 Coupe have a lot to live up to.
We still have a few months to wait until we can drive the new cars, but that doesn't mean we can't get excited in the meantime, learning everything we can. To find out, we sent west coast editor Michael Harley onto the Detroit Auto Show floor earlier this week to talk about the new M cars with BMW product manager Victor Leleu.
If you want a concise, but highly informative rundown of these new cars, look no further than this video. Leleu talks about the styling, weight savings and engines in a lot of detail, making this an interview M fans aren't going to want to miss. Scroll down for the full video.