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New Mazda3 looks just like Mazda Kai concept in spy photos

Just a couple of weeks before the official reveal, one of our spy photographers caught the next-generation Mazda3 out testing in minimal camouflage. The car was a hatchback model, testing alongside a VW Golf and Audi A3, and was only wrapped in thin vinyl. As a result, we can clearly see that the new compact Mazda hatchback looks just like the stunning Kai concept from last year's Tokyo Motor Show. The car features effectively the same nose and profile of the concept. The main grille is larger than the current model, and it leans forward aggressively. The windshield is very low and sleek. The rear portion of the car is dominated by the very thick C-pillar that leans far forward, augmenting the car's athletic stance. The window sill at the rear kicks up sharply, and the rear window doesn't wrap around or bulge out, giving the car a very tight, taut shape. It's not just the outside of the 3 we get to see. We get a good look at the interior. It also looks very much like the Kai's interior, with the focus being the driver. The gauges are flanked by air vents that blend into the shape of the instrument binnacle. The rest of the dashboard is left as uncluttered as possible. The climate controls and vents all reside in the same long horizontal plane. The infotainment screen, which appears to be touch-sensitive based on one spy photo, is canted toward the driver. Mazda's rotary controller does return, as seen in the center console. Also in the center console is the manual shift knob, which we expect, or at least hope, will continue to be available in the U.S. We'll have answers to all our questions about the Mazda3 at the end of this month when it makes its debut at the L.A. Auto Show. We'll also see the sedan version of the car. The powertrain is the biggest mystery at the moment. Mazda showed the Kai with the Skyactiv-X engine, Mazda's spark-controlled compression-ignition gasoline engine. We've driven a development car with the engine, and Mazda seemed to intend the new Mazda3 to use it, but we're not sure if the engine will be ready for the car's launch. If not the Skyactiv-X engine, or perhaps in addition to, Mazda will probably use versions of its current engines. It could carry-over the naturally aspirated 2.0-liter and 2.5-liter four-cylinders currently used. The latter may use the cylinder deactivation now used on the Mazda6 and CX-5. We would love to see the company finally offer the turbocharged 2.5-liter engine from the Mazda6, CX-9, and now CX-5.

Mazda hits Vegas with a pair of Sixes

Despite the fact that the annual SEMA show is more of an exercise in what "could be" than what "will be," it gives automakers the chance to stretch the legs of some of its most important models. Take the 2014 Mazda6, for example - it's hardly new, having gone on sale early this year - but this year's SEMA expo marks the first time Mazda has been able to show off the customization possibilities for its sleek midsize sedan. To that end, the Japanese automaker has arrived in Las Vegas with two very different takes on its sexy Six.
First up is the Mazda6 Club Sport you see above, wearing a "motorsports-inspired" gray, black and red accent-color scheme that, as Mazda says, is "represented in not-so-subtle angular lines reminiscent of a car speeding past your line of sight." The whole car is done up in a base color of Composite Grey, and uses a Brilliant Black roof to match the similarly colored front, side and rear diffusers, as well as the rear spoiler. Mazda has fitted the Club Sport with Rays 57 Motorsport G07FXX 20-inch wheels, wrapped in Yokohama 245/35R20 tires. Powering the CS is Mazda's 2.2-liter Skyactiv-D diesel four-cylinder engine (that we'll get in the standard Six early next year), and other changes include an H&R spring kit, larger Brembo brakes and a Racing Beat exhaust.
And then there's the Ceramic 6 Concept, pictured right. The name comes from the car's Ceramic White paint, though we don't really get the Taupe Silver accent stripes. Mazda says they're meant to mimic "the linear frequency patterns found on the likes of couture dresses and flowing fabrics," but it just looks a bit overwrought to us. The Mazda6 already has so many clean lines, why add more?

Mazda files patents for a sequential twin-turbo setup

Mazda has a history of interesting engine technologies, from yesterday's rotary engine to tomorrow's compression ignition engine, and new patents show it still may have some internal combustion tricks up its sleeve. The one on display in these patents isn't especially new in concept, though. A sequential twin-turbocharger setup is something Mazda itself used on the third-generation RX-7. But it's something we haven't seen much of lately. It looks like it could have some possible advantages over older sequential systems, and it has some potential advantages for enthusiasts. First a quick and dirty primer for what makes a sequential twin-turbo system distinct from other twin-turbo systems. In many twin-turbo engines, there are simply two turbos that work together as one bigger turbo. They're the same size, and they spool up at the same time. With a sequential setup, at low rpm, a smaller turbocharger is spooled up first at low-rpm for quicker throttle response, and as the rpm and exhaust pressure increases, a valve opens up that allows a larger turbocharger to also spool up and provide high-rpm boost. That's basically how the Mazda design shown above functions. A big flap blocks off the larger turbocharger exhaust inlet, channeling all the exhaust to the smaller turbo. When more exhaust is available at high rpm, it looks like that flap opens up to spool up the big turbo, too. What's interesting here is that the way the turbochargers are packaged takes up less space than past systems. It looks like both turbos are contained in one unit that shares the same exhaust outlet, meaning the exhaust manifold could be kept simple and compact. In fact, the piping for compressed intake air could also be shared, reducing the amount of piping, which would further decrease the amount of materials and possible failure points. There are a number advantages of making this system smaller. The potential applications of the system are much greater, since it could fit in smaller cars with smaller engine bays. Making the system smaller also means that there won't be as much weight, which is important from both fuel economy and performance standpoints. Finally, the smaller setup likely uses fewer materials, which could make the system cheaper and thus easier to offer on a wider range of vehicles, or at least more profitable for Mazda.