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Mazda's next-gen SkyActiv engines will drop spark plugs in favor of high compression

Homogeneous charge compression ignition, or HCCI, is the black art of internal combustion engines that aims to produce diesel-like fuel efficiency for the cost of gasoline. Although some of its competitors have developed and subsequently given up on the tech, Mazda confirmed that the next-generation of SkyActiv engines will employ HCCI technology, improving fuel economy by 30 percent and at the same time reducing exhaust emissions. According to Nikkei, a new SkyActiv family of engines is set to debut under the hood of the next-gen Mazda3 sometime in 2018 before making its way into other vehicles. In simple terms, an engine that uses HCCI burns the air/fuel mix using pressure instead of with spark plugs, just like a diesel. At 14:1, Mazda's gasoline engines already have some of the highest compression ratios out there, but a move to HCCI means cranking up the compression to 18:1. While the tech sounds relatively straightforward, using HCCI means dealing with a number of side issues. It's one of those "on paper" ideas that compounds problems when put into practice. Heat, revs, and fuel must all be carefully managed as gasoline doesn't burn the same way as diesel. Mazda is mum on details, but the automaker seems confident that the issues have been sorted. If the new engines do indeed make it to market with HCCI, Mazda will have out-engineered GM, Daimler, and Hyundai, all of which have tried and failed to develop HCCI engines in a cost-effective package. With the market moving towards electrification, it's interesting to see Mazda still focusing so heavily on traditional internal combustion gasoline engines. It's an indication of where they see the market heading for the next few years. Although the automaker has been hesitant to move forward with hybrid and electric powertrains, Nikkei also reports that Mazda will begin mass production of EVs in 2019. Related Video:

2023 Japan Mobility Show Mega Photo Gallery: All the highlights and reveals from Tokyo

The 2023 Japan Mobility Show managed to serve up a surprise heap of exciting and futuristic designs and production reveals. Our staff was on the ground in Tokyo for this year's show, where we captured not just all of the latest automotive trends, but some genuinely weird and fascinating stuff.  Browse: Some Delightful Oddities of the 2023 Japan Mobility Show But on to the cars. This year's show featured introductions from Daihatsu, Honda, Lexus, Mazda, Mitsubishi, Nissan, Subaru, Suzuki and Toyota. Some are weird; some are wild; most are probably destined to change significantly before production or merely fade into the void with the rest of the industry's vaporware, but if even a few of these make it to showrooms, we'll consider it a win. Scroll on down for our live galleries of each of the show's major debuts (and cars we're only now seeing in person for the first time). Enjoy!   BMW X2 and iX2 BMW X2 View 6 Photos   Daihatsu me:MO Concept Daihatsu me:MO concept View 14 Photos   Daihatsu Vision Copen Concept Daihatsu Vision Copen View 7 Photos   Daihatsu Osanpo Concept Daihatsu Osanpo View 6 Photos   Daihatsu Uniform Concept Daihatsu Uniform concept View 6 Photos   Honda Prelude Concept Honda Prelude concept View 5 Photos   Honda Sustania-C and Pocket Concepts Honda Sustania-C and Pocket Concept View 8 Photos   Honda CI-MEV Concept Honda CI-MEV View 3 Photos   Infiniti Vision Qe Concept Infiniti Qe concept View 14 Photos   Lexus LF-ZC Lexus LF-ZC View 8 Photos   Lexus LF-ZL Lexus LF-ZL View 10 Photos   Mazda Iconic SP Mazda Iconic SP concept View 8 Photos   Mitsubishi D:X Concept Mitsubishi D:X Concept View 8 Photos   Nissan Hyper Force Concept Nissan Hyper Force concept View 11 Photos   Nissan Hyper Tourer Concept Nissan Hyper Tourer concept View 6 Photos   Nissan Hyper Punk Concept IMG_6533 copy View 8 Photos   Subaru Sport Mobility Concept Subaru Sport Mobility Concept View 7 Photos   Suzuki Swift Suzuki Swift View 5 Photos   Suzuki eWX Suzuki eWX Concept View 3 Photos   Suzuki eVX Suzuki eVX concept View 4 Photos   Toyota Land Cruiser Se Concept Toyota Land Cruiser Se concept View 4 Photos   Toyota FT-3e Concept Toyota FT-3e View 6 Photos   Toyota FT-Se Concept Toyota FT-Se View 7 Photos     Tokyo Motor Show Honda Infiniti Lexus Mazda Mitsubishi Nissan Subaru Suzuki Toyota

Fiat 124 Coupe could join Spider line next year

While Mazda's content to tease coupe lovers with the last-gen MX-5 Power Retractable Hardtop and the upcoming RF, the company is loath to offer a version of its lovable roadster with a permanent hardtop. But Fiat isn't so fickle. According to Autocar, the Italian brand could unveil a proper hardtop Fiata as early as next year. Likely called the 124 Coupe – duh – Autocar reports the addition of a fixed roof will spice up the current Spider. But what kind of spice is more difficult to predict. AC reports that FCA could stay the course, offering the new hardtop with the same powertrain lineup as the Spider – 138 horsepower in the UK and 160 hp (164 hp in Abarth trim) in the US – or drive the 1.4-liter turbocharged four-cylinder higher. As for how the car will look, Autocar points to the handsome 124 Abarth Rally Concept from the 2016 Geneva Motor Show. Don't expect integrated rally lights or a standard yellow-on-red paint scheme, but the new model will likely borrow that concept's roofline – more notchback than the MX-5 RF's fastback-like look. That'd fit with the 124 Coupe's ancestors, which wore a traditional notchback roofline. Fiat offered a 124 hardtop between 1967 and 1975, giving a new hardtop Fiata much more historical precedence than a comparable MX-5. AC reports the new 124 Coupe will likely carry a 10-percent premium across the pond, with a similar increase in the US. But predicting the impact of that price hike is a little bit trickier than multiplying the 124 Spider's price by 1.1, since we don't know what trims the Coupe will come in. The Abarth is likely a shoe-in, starting around $31,000. If, and it's a big if, Fiat sells a 124 Coupe Classica, expect a $27,500 starting price, while a hardtop Lusso would be a smidge over $30,000. Related Video: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.