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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.

2019 Mazda3 pricing starts at over $20,000, 2.5-liter engine standard

Pricing for the 2019 Mazda3 hatchback and sedan has been announced, and the base price has gone up by about $3,000. The new cheapest model is a front-drive, automatic Mazda3 sedan, and it starts at $21,895. The base Mazda3 now has the 186-horsepower 2.5-liter 4-cylinder as the standard engine, whereas the old model came with a 155-horsepower 2.0-liter engine and manual transmission as standard. Compared like-to-like, a 2018 Mazda3 in a similar spec would be slightly more expensive ($22,035) than the 2019 model. Opting for the hatchback on the base trim adds an additional level of equipment, with 18-inch wheels instead of 16-inch ones, Apple CarPlay and Android Auto, dual automatic climate control, leather wrapped steering wheel and shift knob. It also gets more safety equipment including blind-spot monitoring, automatic emergency braking, radar cruise control, automatic high-beams, automatic wipers and lane-departure warning with lane-keep assist. That all adds up to a $2,600 price increase over a base sedan. These features are available on the sedan for an extra $1,600 in the form of the Select package. For all other trims, opting for the hatchback adds $1,000. Higher trim levels add features such as better sound systems, real leather, a sunroof, heads-up display and power heated seats. In addition to pricing, Mazda revealed drivetrain options for the Mazda3, and they're not great for fans of manual transmissions. The Mazda3 hatchback with front-wheel drive and Premium trim is the only manual offering, and it starts at $28,395. On the upside, at least Mazda isn't relegating manual transmissions to the stripped out versions, but on the downside, there isn't a cheap manual option for those on a budget. And of course, if you want the sedan or all-wheel drive, the six-speed automatic is your only choice. Mazda has told us that it could match a manual with all-wheel drive, but clearly it doesn't see a market for that in the U.S. But like with the addition of the turbocharged Mazda6 and CX-5, if there's demand, such a combination could become available, but keep in mind the odds will still be slim. You can see the full breakdown of trims and prices below. The 2019 Mazda3 will be available in March.

Top Gear recounts the fiery demise of the Mazda Furai

This past September we reported on Top Gear's destruction of the Mazda Furai, one of the finest concept cars to ever grace an auto show stage. It turns out that the Furai, which was burned nearly beyond recognition at the hands of the British magazine, was actually destroyed back in 2008, and that the entire thing had been covered up for five long years.
Now, a few months after publishing that heart-wrenching composite of a half-baked Furai (shown above), the lads at TG have published their account of just what resulted in a priceless concept car being transformed into a smoking hulk on a Suffolk runway. Click over to read the full story about just what happened, along with pictures of the Furai before, during and after the inferno.