2005 Mazda Rx-8 Base Coupe 4-door 1.3l Low Miles on 2040-cars

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LA Design Challenge invokes biology for 2025 concepts [w/poll]

Participants in the annual LA Design Challenge always manage to come up with edgy, wacky designs for future vehicles, but with a theme of "Biomimicry and Mobility: 2025" this year's crop of cars might be the quirkiest we've ever seen. As usual, automotive designers from around the world participated in this year's competition, and all the designs will all be unveiled next week during the LA Auto Show with a winner being announced on November 21.
Chinese automakers made a strong showing with Qoros, SAIC Motor, JAC Motors (the company responsible for the Ford F-150 clone) and Changfeng all bringing interesting takes on the biology, human intelligence and sustainability theme. One of the more innovative ideas among these automakers is the Qoros Silk Road System allows autonomous vehicles to drive in packs similar to how ants travel. Speaking of ants, the SAIC Motor Mobiliant (shown above) gets its design from the shape of an ant's body, and, like the insect, it can climb building acting as a personal elevator as well. The JAC Motors design also merges vehicle and building design, while the Changfeng LaBrea inspired by the design of muscle fibers.
Other entrants include Subaru and US-based design teams for BMW, Toyota and Mazda. BMW's duo of concepts mimic plant and animal life. The LA Subways concept acts as a submersible, single-person vehicle to take advantage of the LA river, with a shape similar to an Ocean Sunfish. The Sustainable Efficient Exploratory Device (SEED) imitates the shape of a seed pod, and uses propulsion methods inspired by a shark, dragonfly and a water bug. Mazda's Auto Adapt might be the most car-like concept of the bunch, while the Subaru Suba-Roo and the Calty-designed, Toyota e-grus are the most mind-blowingly awesome.

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

Mazda CX-5 diesel gets EPA fuel economy ratings

Mazda has been promising that it will bring the Skyactiv-D diesel engine to the United States pretty much since the last Mazda6 redesign for the 2014 model year. And even in the wake of delay after delay, the company has insisted it will happen. Well, it looks like we may not be far from the fulfillment of this promise, since the EPA and DOT's FuelEconomy.gov website now has numbers for the diesel-powered Mazda CX-5. What's surprising, besides the existence of hard numbers, is that those numbers aren't actually that big of an improvement over the gas engine. In fact, highway numbers are the same as the gasoline versions. The front-drive CX-5 diesel gets 31 mpg on the highway, and the all-wheel-drive one gets 30 on the highway. The diesel does see improvements in the city. The front-drive model gets 28 mpg versus 25 for the gas equivalent. The all-wheel-drive model gets 27 mpg rather than 24 for the gasoline version. Also concerning is the fact that the CX-5 diesel isn't the only diesel in the segment. The Chevy Equinox is available with a diesel, too, and while city mpg is about the same, it can hit 38 mpg with all-wheel-drive and 39 with front-drive on the highway. With this in mind, Mazda will probably market the engine as more of a performance upgrade, and maybe something with a bit of extra towing capacity. This is because the engine is expected to make a bit over 170 horsepower and 310 pound-feet of torque. The power number is a smidge below that of the 187 from the 2.5-liter naturally aspirated gas engine, but the torque number is much higher than the gas engine's 186 pound-feet. We've also reached out to Mazda for comment on this development. A representative offered no further comment beyond the company staying committed to diesels. Related Video: