Home » The Hybrid Wankel Rotary-Powered Mazda MX-30 R-EV Is Finally Here. Here’s How It Works

The Hybrid Wankel Rotary-Powered Mazda MX-30 R-EV Is Finally Here. Here’s How It Works

Mazda MX-30 R-EV High Res Topshot

This is not a drill. The Wankel rotary engine is back. After many rumors and patents, we can officially say that the Mazda MX-30 R-EV is real, and upon first glance, it looks amazing. We don’t have many photos of the R-EV model at the moment so we’ve subbed in some photos of the regular EV model, but we’re adding pics as quickly as we can, so hold tight and read on for more details.

Mazda MX-30 R-EV

Why is it that the stubborn nonconformists of the car industry are often the ones we as enthusiasts want to root for? From Saab’s pathological obsession with safety to TVR’s devil-may-care attitude towards driver aids, marques that do things differently often burn their candles twice as bright for half as long, attracting legions of fans long after corporate doors are shut. Mind you, there’s an exception to every rule. Mazda has been around for 102 years, is still fiercely independent, and is willing to stick with and develop crazy ideas everyone else gives up on until they actually work.

Not only did this small Japanese company single-handedly revive the open-topped sports car, it made the first Miller cycle engine in a production car, figured out homogeneous charge compression ignition in a gasoline engine [Ed Note: Though we have yet to see that in the U.S. -DT], and kept a small team of engineers working on the Wankel rotary engine long after emissions regulations forced the rotary-powered RX-8 coupe off sale in 2012. Eleven years after being told we might never see a new rotary-powered car again, Mazda has pulled off the improbable and stuffed a brand new rotary into the MX-30 R-EV.

Mazda MX-30 R-EV side

Mazda isn’t pitching the MX-30 R-EV as an EV with a gasoline range extender, but instead as a series plug-in hybrid. Why the distinction? Well, this isn’t like a BMW i3 with its two-cylinder scooter motor range-extender. Let me explain.

While the standard MX-30 EV is often criticized for its small 35.5 kWh battery pack, the MX-30 R-EV goes even smaller with a 17.8 kWh battery pack offering just 53 miles (85 km) of electric range on the WLTP cycle. While this seems extremely strange, things are about to get stranger. While BMW gave the i3 a tiny 2.4-gallon fuel tank, Mazda’s giving the MX-30 EV a full 13.2 gallons (50 liters) of fuel to play with.

Rear side

Although that may read like a bad joke about rotary engine fuel consumption, bear with me here. While most enthusiasts are familiar with the RX-7’s two-rotor Wankel design, the MX-30 should be the first production car sold to consumers with a single-rotor engine since the NSU Spider. Mind you, the 8C rotary generator in the MX-30 is a little bit different than the rotary engines we’re used to.Mx 30 E Skyactiv R Ev Technology 3 L Large

For starters, the engine doesn’t drive the wheels. It only serves as a generator connected to a motor/generator unit to send power to the battery pack. The battery pack then provides juice to an electric motor which powers the wheels. This means that despite burning gasoline, the MX-30 R-EV should theoretically have the seamless power delivery of an EV, and it should be able to keep the Wankel engine at its “sweet spot” for efficiency for a significant portion of its on-time.

Mx 30 E Skyactiv R Ev Technology 1 L Large

As for deeper details on that rotary engine, there’s the presence of direct injection, something never attempted before on a production rotary engine. The side housings are aluminum and coated with plasma for low weight and friction management respectively, all while being just 80 mm wide. For the sake of longevity, the apex seals are 25 percent wider than the ones on an RX-8’s RENESIS engine, clocking in at 2.5 mm. The result is 73.7 horsepower from just 830 cc of displacement. Curiously, although rotary engines love to rev, Mazda claims that peak power hits at just 4,700 RPM. That might sound weird for a high-revving Wankel, but it should translate to very low noise. Mazda’s doing so much crazy stuff with rotary engines right now, I urge you to check out Patrick George’s article on Mazda’s contraptions.

Mx 30 E Skyactiv R Ev Technology 2 L Large

Perhaps the most impressive statistic is that the 8C single-rotor engine weighs just 214 pounds (97 kg). Combine that with the substantially smaller battery pack compared to the EV model, and the MX-30 R-EV could end up being a surprisingly light plug-in hybrid.

overhead rear 3/4

So what might all of this mean in the real world? Well, suddenly, the MX-30 R-EV makes sense. Not only should it offer a ton of urban range compared to most plug-in hybrid cars, it has the fuel capacity to really hit the open road. Speaking of being out on the open road, the MX-30 R-EV has several neat powertrain functions. It can run on battery power alone, use the rotary engine to charge the battery in a dedicated Charge drive mode, or blend battery power and motor use depending on throttle position. Think of that last one as the kickdown on an automatic car, just re-imagined. The car looks at the power you desire, then figures out how much gasoline assistance is needed to deliver it.

Mazda MX-30 R-EV Edition R Ext 1 L

As for the rest of the MX-30, it’s Mazda flexing what it can do. From the sleek lighting to the unique freestyle doors, the MX-30 is hard to categorize yet still pleasant to look at. Speaking of exterior treatments, Europeans will get a sweet Edition R model in black with a Maroon Rouge Metallic roof as a throwback to the Mazda R360 Coupe.

Edition R interior

Interior materials on the MX-30 are brilliant, with cork, metals, and leather coming together for a warm ambiance. Rear seat space is a little tight, but the MX-30’s fairly small footprint means it probably isn’t a family vehicle anyway.

Think of the MX-30 R-EV as where the old Mazda and new Mazda meet. High-style combining with highly unique engineering to create something totally different. While the MX-30 REV will first go on sale in Europe, don’t be surprised to see it in North America at some point. Pricing hasn’t been revealed yet, but don’t expect it to be super cheap. For context, the standard MX-30 EV gets a little bit of a price hike for 2023 to $35,385 in America and $44,645 in Canada, but Canadians get the benefit of nationwide availability. It’s amazing that the Mazda MX-30 R-EV exists at all, and for American sales to be planned has us feeling oh so lucky.

(Photo credits: Mazda)


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74 Responses

  1. There is a prevailing belief that rotaries are lighter than their piston engine counterparts. I’ve found this to be a myth. They are lighter than a v8, but most 4 cylinders have a weight advantage over a rotary.
    The beauty of the rotary is its small packaging, allowing more ideal front-mid engine placement for superior weight distribution and handling dynamics.
    People are often shocked to hear that a 13b actually weighs about 350lbs.

  2. Can it be less slow? Otherwise, bravo, Mazda, on keeping it truly weird. I’m seriously tempted to make it my next car purely so I can have that warm, fuzzy feeling of owning a piece of engineering performance art.

    1. Yeah, I think that’s a writing flub (sorry Mr Hundal!). “Plasma coated” means plasma was used to coat something with something else, not that it was given a coating of super heated gas (though I guess technically it was, for a brief period of time).

  3. So how does this function differently to something like a Chevy Volt? Is it the same idea? The two seem kinda similar, about 50 miles full electric range, then a gas powered generator kicks in to charge the batteries to continue driving.

  4. So this is now basically the same layout for all current EU Hondas (motor generator to battery), minus switching to direct engine drive at high speeds. Only more complicated. Putting together Mazda’s relatively high servicing costs, batteries and an emmisions-restricted direct injection 1 cyl Wankel engine…
    Either it’s genius or completely insane.
    Time will tell which.
    But I’d love to at least test drive this anyway… Was tempted for the original MX30 before I found out about its range.

  5. This has a lot of similarities with a Honda Clarity. The Clarity has 17 kWh battery good for 47 miles, a 103hp engine good for 300 miles, and overall weighs 4000 lb despite an aluminum chassis (100lb lighter than the all-EV version).

    The big concern is the MX-30’s 73 hp engine. The Clarity could not get away with a smaller engine — there are times when I push it to its absolute limit on long highway climbs when the battery is low. But the MX-30 will have a lower power-to-weight ratio AND greater wind resistance.

    I think Mazda might have made a mistake.

    1. A bit different from the Clarity in that the MX-30 R-EV won’t use the gas engine to drive the wheels, ever. The Clarity usually uses only it’s electric motor but can also drive the front wheels using the gas engine for some extra oomph.

      The MX-30 R-EV will only be driven by a 167hp electric motor, so yeah…don’t expect it to impress while climbing mountains.

      1. Unless that motor manages to get an exception from the laws of the universe it’s only going to put out a bit less mechanical power as the amount of electrical energy put into it. If the battery is depleted that means about 70 WHP from the Wankel generator running balls to the wall. That’s fine if not overkill for long, flat highways at the speed limit but should the road be inclined and or curvy it’s going to be a different story.

  6. 400mi of range on 13gal of fuel makes for about 31mpg, *ignoring the energy you’ve added for the battery*! That’s about the same as a completely non-hybrid Toyota CHR with nothing fancy going on, so what’s the point again?

  7. The 2AZ in my Toyota Rav4 weighs only about 20 pounds more than this 73hp rotary and it makes a still rather sad 164hp.
    This is a very heavy engine for the tiny bit of power it puts out.

      1. Agreed with both of you, rotaries are supposed to be small and light for the power output. Yeah, maybe this includes the generator, or, very optimistically, the radiator etc.

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