The Chinese EV manufacturer Xpeng thought they had the endurance crown locked down. On August 15, they announced their P7 electric sedan had clocked 3,961 kilometers in a single 24-hour stint. It was a genuine feat of engineering and battery management. Ten days later, Mercedes arrived at the party to shatter that notion.
The German marque didn’t just beat the rival’s time. They obliterated it.
Using the track at Nardò in Italy, Mercedes put its AMG GT XX concept car through its paces. The result? 5,479 kilometers covered in just 24 hours. That is 1,518 kilometers further than Xpeng’s effort. A 38% increase. The gap isn’t marginal. It’s a chasm.
Зміст
The 1,360 Horsepower Monster
The secret sauce? Power. Raw, electric power. The AMG GT XX concept boasts a massive 1,360 horsepower. That is not a typo. It is enough force to launch a production supercar into orbit if the traction allowed. But here, the traction was on asphalt.
Mercedes didn’t choose a street-legal sedan for this test. They chose a dedicated endurance machine. The Nardò ring is a high-speed oval, perfect for maintaining velocity without the constant braking and acceleration of a technical circuit. It is a grinder. A test of reliability under sustained load.
Circling the Earth
But the 24-hour run was just the warm-up. The real story is the multi-day grind.
In a staggering 7 days, 13 hours, 24 minutes, and 7 seconds, the AMG GT XX covered 40,075 kilometers. That number is specific. It is not an estimate. It is the exact circumference of the Earth at the equator.
The car traveled the equivalent of the Earth’s circumference in under eight days.
181 hours total. Continuous running. No major failures. Just miles ticking over the odometer.
Why This Matters
Xpeng’s record was impressive for the EV sector. It showed range and thermal management were becoming viable for long-duration stress tests. Mercedes proved something different. They showed that with the right powertrain and cooling architecture, you can sustain speeds that make a lap record look like a slow drive in the suburbs.
The 38% margin over Xpeng is not an error. It is a statement. The AMG GT XX concept is not just a show car. It is a tech demonstrator for what high-performance EVs can handle when pushed to their absolute limit.
The numbers don’t lie. 5,479 kilometers in a day. 40,075 kilometers in a week. The bar has been raised. And it was raised by a mile.
Pushing the EV Limit: 40,233 km in One Go
The numbers don’t lie. Mercedes didn’t just break a record; they dismantled the perceived limits of high-speed electric travel. Seventeen drivers took the wheel of a single vehicle for a grueling marathon that totaled 40,233 kilometers. That is exactly 25,000 miles. To put that distance into perspective, they completed 3,177 laps around the Nardò proving ground, a circuit measuring 12.68 kilometers.
The average daily distance? Over 5,300 kilometers.
This wasn’t a leisurely cruise. The team maintained a steady cruising speed of 300 km/h. To keep the pace, drivers rotated every two hours. It was a logistical nightmare disguised as a record attempt. The physical toll on the car was immense. But the engineering behind it is where the real story lies.
The Battery Innovation That Made It Possible
Standard cooling systems would have melted under this load. Mercedes had to engineer something specific. The battery pack houses more than 3,000 cells. Instead of air or water, they used oil cooling. This direct-to-cell thermal management kept temperatures stable despite the constant heat generation from charging and discharging at extreme rates.
The architecture supports an 800-volt system. This high voltage is non-negotiable for the charging speeds required here. The result? A charging capability of 850 kW.
Think about that stat. In just five minutes, the car gained 400 kilometers of range. That is not a theoretical lab result. It was a real-world validation of energy density and thermal management working in tandem. Most EVs today struggle to add even 100 kilometers in that same timeframe. The gap between consumer vehicles and this prototype is vast.
AMG.EA Architecture Coming Next Year
Why go through this trouble? Because the tech is already slated for production. Mercedes confirmed that the transmission technologies tested in this marathon are ready for the new AMG.EA platform. This upcoming architecture arrives next year.
It signals a shift. High-performance electric vehicles are moving from niche experiments to scalable production reality. The battery chemistry, the oil cooling, the 800-volt bus—these aren’t just for record books. They are for the next generation of AMG models.
“The technologies of transmission used are already ready for production.”
This isn’t just about speed. It’s about proving that electric drivetrains can handle sustained abuse without degrading. The marathon proved the hardware can survive. The question now is whether the market is ready for the cars this technology will eventually power.
