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Fiat 124 caught entirely undisguised

Dear automakers, please continue making these kind of mistakes. Thanks to what we're guessing is some lax security, the all-new, Mazda MX-5 Miata-based Fiat 124 was spotted taking part in a photo shoot near Santa Barbara, CA. The images show what we'd consider a fairly simple rebadging job. The 124 gets new front and rear clips that not only harken back to the original 124 (not to mention other Fiat roadsters, like the Barchetta), but also serves to distance this droptop from the rest of the company's US range. The similarities between the 124 and the car it's based on are even more obvious in the cabin. This is an MX-5 interior with Fiat's big, red badge on the tiller. That means the same quality materials and knob-dial infotainment system that have been so well received in the Miata. It's under the hood, though, where the Fiat really differs from its Japanese cousin. According to our spy, the vehicle shown here features some kind of two-pedal setup – probably the six-speed Euro twin-clutch used in the 500L and Dodge Dart. Don't worry, though, a six-speed stick will also be on offer. Regardless of transmission, we can expect a 180-horsepower version of the 1.4-liter, turbocharged, four-cylinder offered in the 500 Abarth. And if that's not enough good news, a dedicated Abarth model will likely arrive after launch, which our spies claim will use the 1.75-liter turbo and DCT from the Alfa Romeo 4C. While this represents a good look at the new 124, we'll probably be waiting until the LA Auto Show in November for the official look. Stay tuned.

2015 Mazda3 interior spied for the first time

In terms of exterior appearance, not much has changed from the last time we spotted the next-generation Mazda3 out testing. Oh, sure - we can see plenty of details that clearly show the new Kodo design influence (that front end reminds us a whole lot of the sleek new Mazda6), but these latest round of spy shots don't really show us anything we haven't seen before. Oh, wait, yes they do - the interior.
Feast your eyes on the Mazda3's insides, showing a vastly reworked interior that also takes cues from the automaker's most recently refreshed products. We can see that there's a simple, clean center stack with a slim row of heating and cooling functions, and up top there's a large, presumably touchscreen display, with redundant controls found just aft of the shifter.
We expect that the 2015 Mazda3 will debut at the Frankfurt Motor Show this September, packing both petrol and diesel engines. A sedan variant is also in the works, and should debut shortly after the hatchback.

How Mazda got Skyactiv-X to work is incredible

"Take everything you know about engines and turn it around," Mazda North America Vehicle Development Engineer Dave Coleman says, patiently and with a look of benevolent pity, as he's quizzed about the particulars of the company's new engine. The Skyactiv-X engine is enigmatic — and deceptively simple in operation. And the bottom line for American consumers is that they'll be able to buy a car (or crossover; we don't know yet what vehicle will first get it) by late 2019 that provides diesel-like fuel economy but runs on regular old gasoline. In between diesel and spark ignition, but it's neither To truly understand it, you have to dive into the contradictions. Take that regular old gasoline: Contrary to common sense, the lower the octane, the better it works. In the lab, the Skyactiv-X engine loves 80 octane. The lowest Americans get is 87, so the engine is tuned for that octane. Go higher and you lose some low-end torque. Coleman was right. It's hard to wrap your head around an engine that thrives just at the point when most gas engines would aggressively self-destruct. It uses a supercharger to pump additional air — but not additional fuel. It uses spark plugs to start a combustion cycle that normally doesn't need a spark. And, quixotically, it's not displacing Mazda's own American-market diesel engine, currently languishing in a seemingly endless hell of regulatory approval. More bizarre: Mazda is a tiny automaker facing real existential headwinds, and gasoline compression ignition is a massive challenge. GM and Hyundai announced compression ignition, or HCCI, projects (full name, homogeneous charge compression ignition) to great fanfare, but they never amounted to a production hill of beans, crippled by reliability issues or horrible vibrations. Worse, they only worked at an unusably narrow range — low RPMs and low loads. HCCI research improved direct-injection gas and diesel engine technologies for these companies, but HCCI itself remains untamed. The benefits of lean combustion Why even try to tame HCCI? The answer is much better fuel economy and lower emissions. Less burned carbon-based fuel, less carbon dioxide released. That's simple. But there are some thermodynamic reasons for the lean combustion you can achieve with compression ignition that are worth explaining. The ideal amount of fuel for a conventional engine to burn is about a 14:1 air-to-fuel ratio. That lets every molecule burn nicely, in theory.