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2014 Mazda3 2.0L Hatchback officially rated at 40 mpg highway

The Environmental Protection Agency has spoken, and these are the miles per gallon numbers it has officially bestowed on the 2014 five-door Mazda3 hatchback with the SkyActiv-G 2.0-liter engine: 29 city, 40 highway, 33 combined when fitted with the six-speed manual; 30 city, 40 highway and 33 combined when equipped with the six-speed automatic.
Those numbers exactly match the fuel economy targets that Mazda had set for the car when optioned with the 2.0-liter Skyactiv-G with 155 horsepower and 150 pound-feet of torque. For comparison to other cars in the segment, the EPA numbers for the 2013 Honda Civic sedan are 28 city, 39 highway, 32 combined when its 140-hp, 1.8-liter four-cylinder is paired with the five-speed automatic. The Hyundai Elantra GT gets 27 city, 37 highway and 30 combined according to the EPA when its 148-hp, 1.8-liter four-cylinder is paired with either a six-speed manual or six-speed automatic transmission. The numbers for the 2014 Ford Focus aren't out yet.

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.

Watch what happens inside a rotary engine

Since it looks like Mazda may very well revive the Wankel rotary engine as a range extender for electric cars, there's no better time to become reacquainted with the quirky internal-combustion engine. And there's hardly a better way to become reacquainted than by peering into a running rotary engine, which you can do with the video above. The video comes to us from the YouTube channel Warped Perception. The channel has already shown what happens inside a conventional internal-combustion piston engine by putting a clear cylinder head on top of a flathead engine. This new video shows off the rotary engine by adding a clear side to a tiny model-airplane engine, something that we weren't aware existed and are glad to know about now. Despite the tiny size, the engine is functionally almost exactly like the bigger versions you'll find in Mazdas from about 1967 to 2012. It has intake and exhaust ports on the edges of the rotor housing, and the triangular rotor swings about in a peanut-shaped housing. For maximum effect, jump to right around the 7:40 timestamp. This is the point at which a bit of acetylene is added to the air-fuel mix for a brighter flame. It's at this point that you can really see when the mixture combusts and how the pressure of the flame pushes the rotor to produce rotational motion. Each stage of the video does slow things down to make everything as clear as possible. Even if you already knew how rotary engines worked, it's still fascinating to watch, first because it's something you don't get to see usually, and also because of the engine's elegant simplicity. Related Video: Image Credit: YouTube / Warped Perception Weird Car News Mazda Technology Videos rotary rotary engine