Skip to main content

Acura teams up with an old rival on new purpose-built ARX-05 race car

It may not have the long history of Ferrari or Porsche, but Acura is clearly committed to racing. The Honda luxury brand has been racing for more than 25 years, currently fields its NSX hybrid supercar in two different series, and is a regular at the Pikes Peak International Hill Climb. And next year, Acura will shift into an even higher gear.

Instead of only racing souped-up versions of production models, Acura will rejoin the ranks of purpose-built race cars, known as prototypes. Acura’s new prototype racer was unveiled at “The Quail, A Motorsports Gathering,” part of the sprawling Monterey Car Week in California, and will make its racing debut in January at the Rolex 24 at Daytona.

Called the ARX-05 (Acura Racing Experimental, generation 5), the car was built for the IMSA WeatherTech SportsCar Championship‘s Daytona Prototype International (DPi) class. The class currently features race cars from Cadillac, Mazda, and Nissan, with powertrains and styling unique to their respective manufacturers. That gives each car more of an identity, while still keeping the playing field relatively level.

Acura followed the same template with the ARX-05. It’s based on an Oreca 07 chassis, but features styling cues pulled from Acura production models, including the automaker’s “Jewel Eye” headlights. The race car was actually designed in the same California studio that helps shape production models. The engine is a 3.5-liter twin-turbocharged V6 based on the “J35” engine used in the Acura RLX, TLX, MDX, and RDX. Different versions of this engine have also been used in previous Acura and Honda race cars.

Acura may be building the cars, but Team Penske will actually race them. That’s the racing empire of the legendary Roger Penske, who has more Indianapolis 500 wins as a team owner than anyone else. Still, the partnership is a bit peculiar because Acura and Penske used to be rivals. The last time Acura raced prototypes, Penske and its Porsche RS Spyders were the main competition.

The Acura ARX-05 will be displayed throughout Monterey Car Week, the pseudo car show made up of multiple events, including the prestigious Pebble Beach Concours d’Elegance. The car has already been through some shake-down runs at the Paul Ricard track in France, but it won’t turn a wheel in anger until the Rolex 24 at Daytona, the legendary Floridian 24-hour race, in January.

Updated: Added details on styling and engine, as well as photos

Editors' Recommendations

Stephen Edelstein
Stephen is a freelance automotive journalist covering all things cars. He likes anything with four wheels, from classic cars…
Mercedes-Benz G580 first drive: old-school off-roader goes electric
2025 Mercedes-Benz G580 from three quarter view.

American car buyers mostly know Mercedes-Benz as a luxury brand. But for decades, the automaker has also produced the tough, rugged G-Class (also known as the Geländewagen or G-Wagen), an SUV not afraid to get its leather upholstery muddy. And now, this iconic Mercedes is going electric.

The 2025 Mercedes-Benz G580 with EQ Technology — the final name of the SUV previously known as the EQG — isn’t the first electric off-roader. The Rivian R1S and R1T and GMC Hummer EV have proven that electric powertrains and off-roading are a great combination. But the electric G-Wagen is different because it’s based on an internal-combustion model — and a very traditional one at that.

Read more
Honda believes hydrogen semi trucks will make the case for fuel cells
Honda hydrogen fuel-cell semi truck.

Honda remains committed to hydrogen fuel-cell vehicles, but the market for those vehicles remains limited. So Honda is looking at other uses for fuel cells -- including commercial trucks.

To show how that could work, Honda converted a semi truck to fuel-cell power, replacing its diesel engine with three fuel-cell modules. Together, the three modules produce a combined 321 horsepower, and can propel the truck to a top speed of 70 mph. There's enough onboard hydrogen storage capacity for a 400-mile range with a full load, Honda claims.

Read more
Mercedes-Benz G580 vs Rivian R2: Is the much cheaper Rivian actually better?
2025 Mercedes-Benz G580 from three quarter view.

Mercedes-Benz has finally taken the wraps off of the new "Mercedes-Benz G580 with EQ Technology." Yeah, it's a mouthful, but it's basically a new electric G-Wagon. It looks a lot like the G-Wagon you know and love, but with an electric powertrain and a battery. It's not the only electric SUV out there, however, and there are some great ones -- like the Rivian R2.

Both the Mercedes G580 and the Rivian R2 have a lot going for them, but they also approach the electric SUV slightly differently. Is one better than the other? I put the two head-to-head to find out.
Design
The approach that the two vehicles take to design is quite different -- and you might like one better than the other.

Read more