Mercedes-AMG GT XX drove at 186mph for 24 hours straight, setting a new record
Published on Aug 27, 2025 at 9:51 AM (UTC+4)
by Callum Tokody
Last updated on Aug 27, 2025 at 4:35 PM (UTC+4)
Edited by
Kate Bain
The Mercedes-AMG GT XX proved its EV endurance by running 186 mph for 24 hours, a test of AMG performance in a fully electric supercar.
In a 24-hour run at Italy’s Nardò High-Speed Test Track, the car averaged 186 mph and completed 3,405 miles.
The figure eclipsed the previous record by almost 1,000 miles.
The controlled test offered a rare look at how Mercedes-AMG is developing its next generation of high-performance models.
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Mercedes-AMG GT XX breaks the record
The Mercedes-AMG GT XX ran 3,177 laps of the 7.88-mile circuit during the test.
Drivers rotated every two hours, with George Russell, AMG factory drivers, and endurance specialists sharing the workload.
Conditions were demanding, with air temperatures passing 95°F, but the electric supercar sustained its pace.
Charging stops were short.
The 800V system and 850-kW charging hardware restored 249 miles of range in about five minutes.
The car’s three axial flux motors, producing over 1,300 horsepower, worked with a directly cooled Formula 1-derived battery to deliver consistent output.
Together, these systems allowed the Mercedes-AMG GT XX to maintain high performance throughout the run.
Russell described the response of the driveline as comparable to Formula 1 machinery while noting that the car’s endurance matched the reliability he had seen in combustion engines.
His remarks focused on the engineering, with no speculation about production details.
The test was designed to generate data, and the results showed that the electric supercar could sustain high speed over long periods.
AMG’s electric hypercar tease
Earlier this year, Mercedes-AMG gave an early look at an electric hypercar that shares technology with the GT XX endurance car.
The teaser showed a low, aerodynamic shape with clear links to the Vision One-Eleven concept, signaling that AMG intends to carry design and engineering lessons from testing into its most exclusive models.
It also suggested that endurance capability will not remain confined to experimental projects but will shape the future of AMG’s halo cars.
The hypercar is expected to sit at the top of AMG’s lineup, built on the AMG.EA electric platform and using axial-flux motors related to those that powered the GT XX.
By combining the endurance data gathered in Italy with a flagship hypercar program, Mercedes-AMG is connecting real-world testing to production intent.
This move places endurance, speed, and advanced electric systems at the center of its performance strategy going forward.
Earlier this year, Mercedes-AMG offered a first look at an electric hypercar based on the same AMG GT EV platform, suggesting how lessons from the GT XX endurance run could influence its design and performance.
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Callum Tokody is a content writer at Supercar Blondie, where he covers the latest in the automotive world with a focus on design and performance. Callum has a background in automotive journalism and has contributed to a range of publications in Australia and the UK. Outside of work, he’s a design enthusiast with a soft spot for anything with a V8 and a good story.
