It seems Mercedes-AMG got tired of the usual electric vehicle conversation about range anxiety and quiet commutes. So they built a technology pioneer, the CONCEPT AMG GT XX, sent it to the legendary Nardò test track, and basically told it to drive “around the world” in under eight days. And it did.
A few days ago, this electric beast covered a staggering 40,075 kilometres in just 7 days, 13 hours, and 24 minutes, all while maintaining a blistering running speed of 300 km/h. In the process, it didn’t just break records; it obliterated them, setting a total of 25 new long-distance benchmarks. The most impressive feat? The record for the longest distance covered by an EV in 24 hours was not just beaten, but shattered a total of fourteen times by the two concept cars AMG fielded for the challenge.
This is a brutal, real-world stress test for technology that will define the next generation of performance cars. As Markus Schäfer, Mercedes-Benz Group’s CTO, puts it, the mission is to “redefine the very standards of performance with groundbreaking technologies and innovations”.
The Heart of the Beast: Production-Ready Power
Beneath the radical skin of the GT XX lies a revolutionary drivetrain that’s closer to reality than you might think. The car is powered by three potent axial flux motors and a direct-cooled battery. This isn’t just concept-car fantasy; AMG confirms these core technologies will enter production as early as next year in their upcoming high-performance AMG.EA architecture. This Nardò endurance run was the ultimate validation, and AMG says the data gathered will directly benefit the refinement of that platform, meaning future customers will experience “an entirely new dimension of sustained electric power”.
The Secret Sauce: How AMG Conquered Heat and Drag
Sustaining 300 km/h for days on end in an EV presents two colossal challenges: managing heat and cheating the wind. Conventional EVs often have to reduce power to prevent overheating, a process known as de-rating. AMG’s answer is a resounding “no” to compromise.
Cool Under Pressure
The key is an innovative and highly integrated cooling system. At its core is a “mastermind” component called the Central Coolant Hub (CCH). This compact unit combines pumps, valves, and sensors, precisely managing the temperature of the battery, the Electric Drive Units (EDUs), and the power electronics. It works in concert with direct liquid cooling for the battery cells and a clever passive cooling plate in the underbody, a technology borrowed from the ultra-efficient VISION EQXX.
The result? The CONCEPT AMG GT XX can deliver its full, relentless performance in virtually any situation. It can go from a blistering hot lap straight to a maximum power charging session, and then immediately back to the track with exceptional performance instantly available.
Slipping Through the Air
At 300 km/h, a car uses about 83% of its energy just to fight aerodynamic drag. Efficiency here is paramount. Through meticulous refinement, AMG’s engineers achieved a stunning drag coefficient of just 0.19, even with wide, high-performance tyres.
This was accomplished through a host of active and passive measures. An advanced AIRPANEL system with movable louvres opens only when cooling is absolutely necessary. A specially contoured underbody creates a Venturi effect, sucking the car to the road and providing so much downforce that the active rear spoiler could remain retracted for the entire Nardò test. Even the newly developed 20-inch wheels, with their special carbon-fibre claddings, are designed to manage airflow and increase stability.
The Pit Stop Revolution
To keep the cars running, you need equally impressive charging. The team installed a temporary High-Power Charging Hub at Nardò, capable of delivering over 2.5 megawatts. Working with partner Alpitronic, they developed a prototype charging station that could send a massive 1000 amps of current through a standard (albeit specially cooled) CCS cable. This allowed the CONCEPT AMG GT XX to charge at an incredible average of around 850 kW, a critical factor in the record run’s success.
Brains Meet Brawn
Orchestrating all this hardware is an intelligent operating strategy built on the MB.OS software architecture, developed with expertise from the Formula 1 engine wizards at Mercedes-AMG High Performance Powertrains (HPP). By using specially instrumented battery cells in advance, the team collected vast amounts of data to create precise digital models, allowing the Battery Management System to keep every component in its optimal performance window at all times.
From its record-shattering endurance to its production-bound technology, the CONCEPT AMG GT XX is more than just a car. It’s a statement of intent, proving that the age of electric performance won’t just be fast—it will be relentless.
