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Mazda engineer wants new rotary to be turbocharged

Hope springs eternal for Mazda to revive the high-revving Wankel engine for a new sports car, and the company keeps feeding that thirst with hints that it could happen. To make the possibility even more tantalizing, Mazda drivetrain and powertrain assistant manager Tetsushi Marutani tells Motoring that he wants the updated mill to pack a turbocharger. "Personally, I think that a rotary with some turbo or compressor would be good," Marutani said to Motoring. "Because a rotary, in my opinion, they require more [torque at] low speed, low down torque. So if we have some small compressor or turbo it would help." Mazda hasn't sold a rotary-powered model since the RX-8 and hasn't had a turbocharged one since the third-generation RX-7. However, the recent RX-Vision concept (above) at least hinted at a possible Wankel revival, and Mazda officials confirmed that its engineers continued to develop the engine since the RX-8's demise. The RX-Vision used a next-gen rotary called the Skyactiv-R, but Mazda didn't officially confirm any details about it. Rumors suggested the engine had a two-rotor layout with a total displacement of 1.6 liters. A two-stage electric turbo and hybrid powertrain would allegedly boost the total output of around 450 horsepower. The electric assistance could also counter the Wankel's lack of torque at low revs and poor fuel economy. Those rumored specs sound fantastic, but we still take the rotary's return with a grain of salt. Mazda CEO Masamichi Kogai is adamant that it's not worth the company's limited resources to develop a niche sports coupe instead of better selling vehicles. Related Video:

Mazda3 five-door vs. Mazda CX-3

As a talking point, it won't rival North Korea, world hunger or Mideast peace, but the ongoing tug between car and crossover continues to resonate in the hallways of Autoblog HQ. And it might also generate some discussion on Mazda showrooms, where the Mazda3 five-door and Mazda's CX-3 crossover are parked within a few feet of each other. Not only do they enjoy proximity on the showroom, but they enjoy/suffer (your choice, depending on POV) pricing proximity on the window sticker. The Mazda3 five-door is the more mature model of the two, having been introduced to a world market in fall 2003. With a commonsense footprint enclosed by almost-organic, upscale sheetmetal, the Mazda3 – especially in 5-door form – punches well above its weight in the still-nascent hatchback category. With a redesign (third-generation) introduced in 2014, along with a more recent refresh, the newest sedan and hatchback merge Mazda's KODO design philosophy with a responsive platform, available 2.5-liter drivetrain and a comfortable – if not expansive – interior. What the Mazda3 5-door (photo at left) does not give you is the crossover's high hip point, despite having ground clearance almost identical to the CX-3 subcompact crossover. And while the stated passenger volume of the Mazda3 and CX-3 is almost identical, those cubes are arranged differently; the Mazda3 offers an interior package more linear, while the CX-3 is more upright. Mazda's subcompact CX-3 (photo at top) is a more recent entry, having been developed from the Mazda2 architecture and hitting the street two years ago. It sits below Mazda's CX-9 and CX-5 in the Mazda pecking order. And it is tiny, on a wheelbase of just 101 inches and offering an overall length of just 168 inches. It is seven inches shorter than the Mazda3, with a wheelbase five inches shorter. The net effect is a more compressed environment for passengers, along with the very real challenge of fitting something inside – such as a bicycle – even when that something has its front wheel removed. In the city, I like the CX-3's compactness, and relatively unrestricted visibility when compared to the Mazda3's overall length and lower seating. But when both are equipped with their six-speed automatics, and the Mazda3 is spec'd with its available 2.5 liter DOHC four, there's almost no comparison in their performance. With that spec the hatchback has Mazda's well-hyped zoom, while the CX-3 makes do with nothing but a 4-cylinder boom.

Mazda to use rotary engine as a range-extender with its first electric vehicle

There's more news from Mazda at the Tokyo Motor Show, where the brand made a big splash, including new developments in its never-ending rotary engine saga. First, Mazda execs confirmed that the Japanese automaker will bring back the rotary engine as a range-extender and battery juicer for its first electric vehicle in 2019. But secondly, the company won't have a rotary-powered successor to its RX-7 and RX-8 sportscars in time for the company's centennial anniversary in 2020. Autoblog previously confirmed that Mazda is planning to have an EV in 2019 that will be available in both pure electric and range-extending versions. Now, the Australian website Motoring reports that the global EV will feature a powertrain similar to the experimental Japan-only Mazda2 (Demio) EV, which used a single-rotor engine as a generator to power the battery pack and increase its driving range. The publication says Mazda plans to release a series of plug-in hybrids based on existing models around 2020, then a pure electric car co-developed with Toyota and Denso in 2021 as part of the EV Common Architecture Spirit Company joint venture. A Mazda spokesman tells Autoblog the company couldn't confirm any details about future products. Meanwhile, enthusiasts shouldn't wait for a rotary-based production version of Mazda's RX-Vision concept from 2015. Motoring cites two executives who explain that the company simply lacks the capital necessary to invest in developing the new model in time for its 2020 centennial. Mazda debuted its rotary engine 50 years ago in the Cosmo Sport in part as a way to stand out from its larger Japanese competitors. The engine, which uses a spinning three-tipped rotor in place of pistons, is smaller and lighter than conventional piston engines, with a greater power-to-weight ratio and quieter, smoother operation. But it delivers less fuel economy and higher emissions — two weaknesses that could be improved via a stop-start system Mazda has developed, based on a pair of U.S. patents. The company has also been hard at work developing its next-generation Skyactiv-X engine, which uses highly precise combustion ignition technology to deliver significant gains in fuel economy and power.Related Video: