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Mazda Skyactiv-X Review | The revolution begins with a squeeze-bang

The matte black Skyactiv-X prototype looks like a rough Mazda3, perhaps reconstructed after a bad wreck by an over-enthusiastic owner of a spot welder and lots of gaffers' tape. Ribbed ducts poke out of the dash sending two breaths of conditioned air to no one in particular. Even its revolutionary engine, the thing we're here to experience, is entombed in a massive, nondescript cover to mask its unseemly noises. It's a wild, strange way to meet a very unconventional vehicle that promises diesel-like fuel economy, a wide torque band, and an exotic method for burning less gas than ever before. It takes a few hours for Mazda's engineers to explain the fundamental principles of operation. For more detail, read our Skyactiv-X Spark Controlled Compression Ignition explainer, but here's a very brief overview. Skyactiv-X marries some traditional gasoline engine characteristics with a novel form of compression ignition called SPCCI. The key for Skyactiv-X is to use very high compression in the cylinder and an extremely lean fuel-air mixture. Squeezed right to the cusp of getting hot enough to blow up all on its own (which is very hard to predict), a squirt of extra gas and a spark interject to cross that compression-ignition threshold in a controlled and predictable manner. See the animation below: That takes a few essential components to get just right. One is a massive amount of computer processing power and some pressure sensors in the individual cylinders, because the ambient conditions change how and when these things happen. Skyactiv-X uses a clutched supercharger to pump in additional air when needed to nail the mixture precisely, and high-pressure injectors to get the low ratios of fuel to disperse properly in the chamber. And since it operates like a conventional gasoline engine sometimes, it uses valve timing to lower the very high compression ratio so it doesn't reach combustion ignition in that mode. In practice, the Skyactiv-X runs in compression ignition mode most of the time. In practical terms, that means it drives like a torquey gasoline Skyactiv engine. The torque curve is broad and flat — diesel-like in that respect. That also means it can get away with using a six-speed transmission and a lower final drive for better response. There's enough grunt and economy together that Mazda can let the engine spin faster — at 60 mph, it's running at roughly 1,000 more RPM than a similar gas engine, with greater efficiency.

2020 Mazda3 Review & Buying Guide | The connoisseur's choice

Completely redesigned last year, the 2020 Mazda3 pretty much carries over, continuing to be the connoisseur's choice for a compact car. For starters, its elegant sedan and unique hatchback body styles are considerably more stylish than expected for this segment. Park it next to a similarly priced Honda Civic or Toyota Corolla and people are likely to think you paid far more than you did. The same goes for the cabin, which is functional yet stylishly minimalist (if a bit cramped). Then there's the driving experience, which continues to delight those who value sharp responses and a driver-focused character. The switch to a less sophisticated rear suspension for this latest generation has dulled some of its corner-taking capability at the limit, but that's a low-percentile complaint. The bigger dynamic beef is perhaps that Mazda doesn't offer a hotter version in the vein of the Civic Si or VW GTI. Yet, that falls under the category of "wishes" not "problems," which the 2020 Mazda3 has scarcely few. Perhaps it won't be for everyone in the market for a compact car, but everyone should at least consider it.   What's new for 2020? After being completely redesigned last year, updates are light for 2020. The base trim level now comes standard with the Mazda i-Activsense suite of accident avoidance tech and driver aids that continue to be standard on every other trim level. 2019 Mazda3 AWD View 33 Photos What's the interior and in-car technology like? The interior quite simply makes you go "wow." A Honda Civic or Toyota Corolla, which are actually quite nice, look and feel like they should cost substantially less – especially when comparing top trim levels. Whatever trim level of 3 youÂ’re considering, however, the key to its wow factor is how the MazdaÂ’s design removes visual clutter by reducing switchgear and effectively hiding air vents and door handles. It just looks special. It's also functional. The steering wheel, which looks sensational, is an absolute treat to hold. There's considerable center console space and Mazda's tech interface, which had lagged behind its competition due to key usability issues, has been cleaned up. The dashtop screen is large and easy to see. The knob that controls it is large, not unlike BMW's iDrive, and ergonomically placed on the center console. It's not a touchscreen, though, as Mazda engineers determined that hunting for touch-operating icons can be distracting.

So, just how different are the Fiat 124 Spider and Mazda MX-5 Miata?

"We leveraged a great platform." That's how Bob Broderdorf, Jr., Fiat's North American director, summarizes the creation of the 124 Spider. We all know Fiat's new roadster shares its underpinnings with the fourth-generation Mazda MX-5 Miata, but there are a lot of key differences to keep them separate in the eyes of consumers. Mazda may have engineered the platform, but Fiat added many of its own touches. Here, we'll take a closer look at the spec sheets of the two cars, and summarize the major differences between the Japanese and Italian roadsters. If you need a refresher, read our full First Drive of the 2016 MX-5 Miata, and glance at all the Fiat 124 Spider details in this post. Design Fiat Chrysler design lead Ralph Gilles is super excited about this car. "I think it's going to change lives," he told the assembled media at an event in Auburn Hills, MI, earlier this month. Yes, it's definitely exciting to add a small roadster to any lineup, especially one that uses such a proven platform. But we're not sure people are going to get all that jazzed about it from a design standpoint. You'll either love it or hate it, and we're kind of leaning toward the latter. Every single body panel is new, and the design is "100 percent Italian." There are a number of creases and angles throughout the exterior, with a squared-off rear end and rectangular taillamps. Fiat trusts you'll be able to spot the similarities between the new 124 Spider and the original, but we're not so sure. We can see a bit of the old car's grille on the new car's face, and the dual hood blisters are a nice throwback touch, but that's about it. Trust us when we say that this car looks way better in photos. In person, it really didn't wow us. Of course, beauty is in the eye of the beholder. One colleague told us his wife, a long-time Miata owner, hates the look of the new one but will absolutely adore the Fiat. Good for her, and good for Fiat. But based on design alone, we'll take the Mazda every single time. What about you? Dimensions When Broderdorf said Fiat leveraged the Miata's platform, that means the Italians took it as-is. The two cars ride on an identical, 90.9-inch wheelbase. The front and rear tracks lengths are the same, at 58.9 and 59.1 inches, respectively. But that's where the similarities end.