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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:

Mazda Slovakia brochure reveals Skyactiv-X Euro power numbers

After driving a prototype of Mazda's Skyactiv-X engine in a Mazda3 in January last year, we wrote, "If you want to talk numbers, they're understandably fuzzy. The Skyactiv-X tune isn't final yet, so horsepower and torque figures are a moving target." They're no longer fuzzy in Slovakia, where a brochure for the new Mazda3 sells final figures as 181 metric horsepower and 222 Newton-meters, or 178 horsepower and 164 pound-feet. We don't know the Slovakian engine's displacement. If that Skyactiv-X is a 2.0-liter, it compares to our 2.0-liter Skyactive-G in the Mazda3 that makes 155 hp and 150 lb-ft, or the tuned Skyactiv-G in the 2019 Miata that makes 181 hp and 151 lb-ft. According to the spec sheet on the Slovakian Mazda site, their 2.0-liter Skyactiv-G in the CX-3 makes 148 hp and 152 lb-ft, and in their Mazda6 makes 162 hp and 155 lb-ft. According to the brochure, those numbers will rise to 164 hp and 157 lb-ft in the coming Mazda3. The Skyactiv-X numbers are in sight of what reps at Mazda in California gave us for output during our drive, which was closer to 190 hp and 180 lb-ft. Mazda said at the L.A. Auto Show last year that the Skyactiv-X would launch in markets with stricter emissions regulations first, so a small European market with tighter controls doesn't define what we get. Given our less restrictive environment, tuning for more power shouldn't be a moon shot. Doing so would put the Skyactiv-X in with the optional 2.5-liter four-cylinder in the U.S. Mazda3, which makes 184 hp and 185 lb-ft. The real test will be gas mileage; the purpose of the Skyactiv-X is to provide those figures in company with 20 to 30 percent better fuel economy than the Skyactiv-G. Autoweek characterized Mazda CEO Akira Marumoto's comments on the engine as, "The Skyactiv-X variant will be positioned as the higher grade. It will have the driving dynamics of the 2.5-liter gasoline setup but the fuel economy of a 1.5-liter diesel." We have questions about this strategy, but we'll have to see how the pricing works out. Since the 2.5-liter serves as the base engine on the 2019 Mazda3, buyers can expect a meaningful premium to get into a Skyactiv-X. Right now, there's a $1,495 surcharge to go from the current 2.0-liter Mazda3 hatch to the 2.5-liter.

Jay Leno brings a rotary-powered VW Beetle to the garage

It takes something really unique or inventive to pique Jay Leno's interest. His show, Jay Leno's Garage, has featured everything from concours-worthy classics to completely custom, home-built machinery. How do you get Leno to feature one of more than 20 million Beetles on his program? Stick a turbocharged rotary engine under the hood. The Beetle's owner, Mario Markakis, swapped the car's stock flat four-cylinder for the Wankel engine from a 1990 Mazda RX-7 Series 5 Turbo. The engine's 250 horsepower are fed through a reinforced version of the Beetle's stock four-speed transmission. That's about five times the original engine's output. It works well, with the car putting down some impressive times at the drag strip. Markakis did most of the work to the Beetle in his garage. In addition to the engine swap, he's modified the car's brakes, suspension, and interior. Check out the video to hear all the details of this custom Wankel-powered Volkswagen. Related Video: Celebrities TV/Movies Mazda Volkswagen Classics Videos Jay Lenos Garage rotary mazda rx-7