CONCEPT AMG GT XX sets 25 performance records

With the CONCEPT AMG GT XX, Mercedes-AMG sets new benchmarks and continues the brand’s decades-long tradition of relentlessly pushing the boundaries of automotive engineering. From historic motorsport triumphs to legendary records on race and test tracks, the performance brand from Affalterbach has always stood for the pursuit of ultimate performance.

Mercedes-AMG reaffirmed this commitment just last year with the lap record of the Mercedes‑AMG ONE on the Nürburgring-Nordschleife. Since October 2022, the hypercar has remained the fastest production vehicle ever on the iconic circuit – having even beaten its own benchmark.

Now, the CONCEPT AMG GT XX builds on this proud legacy and delivers a powerful demonstration of the superior performance of the upcoming high-performance architecture AMG.EA.

The technology pioneer is powered by revolutionary drivetrain technologies set to enter production next year with AMG.EA. Featuring three axial-flux motors and a directly cooled high-performance battery, the concept vehicle promises a new dimension of power and endurance. Mercedes-AMG has now proven exactly that under extremely tough conditions – the ultimate test evoking the record runs of the past, powered by the technology of tomorrow.

On the legendary high-speed test track in Nardò, Italy – a site where the world’s fastest cars have been tested for decades – the CONCEPT AMG GT XX broke a total of 25 long-distance records. Among them was the record for the greatest distance ever covered by an electric vehicle within 24 hours. The previous record was under 4,000 kilometers. The CONCEPT AMG GT XX has far surpassed this value: The technology platform traveled 5,479 kilometers in 24 hours – that is 1,518 kilometers more or around 38 percent further than the previous best.

But this was just one of many records that the CONCEPT AMG GT XX secured with a commanding lead. The technology pioneer’s extreme test lasted far longer than 24 hours. The goal: to drive “around the world in eight days” – a mission designed to prove the superior long-distance performance of the AMG electric drivetrain. The name of the challenge? A nod to Jules Verne’s famous novel “Around the World in 80 Days”.

The run followed an exceptionally demanding schedule. The greatest strain on motors and battery occurs under high-load driving and high-speed charging cycles. To simulate this scenario repeatedly, the CONCEPT AMG GT XX was tasked with covering as many kilometers as possible in the shortest possible time. Drivers maintained a constant speed of 300 km/h, stopping only to recharge at power levels averaging around 850 kW – far beyond what today’s charging infrastructure can provide. This once again underscores the future-proof capabilities of this production-ready drivetrain. After each charging stop, the vehicle accelerated back to 300 km/h – over and over, day and night, for eight relentless days.

Although capable of significantly higher speeds, the vehicle’s pace was deliberately set by the engineers based on extensive simulations. According to these analyses, 300 km/h offered the optimal balance between track speed and charging stops, delivering the fastest overall time.

In the early morning of 25 August 2025, the moment finally arrived: mission accomplished! The distance of 40,075 kilometres (24,901 miles) was covered in exactly 7 days, 13 hours, 24 minutes and 07 seconds – beating its own target of eight days by a wide margin. Along the way, the CONCEPT AMG GT XX set a number of additional performance records and even pushed on to reach yet another milestone at 25,000 miles.

It wasn’t just one CONCEPT AMG GT XX that mastered the extremely demanding marathon program – but two. Both vehicles set off simultaneously on the record-breaking drive and delivered a compelling demonstration of endurance: After more than seven and a half days of operation and a full circumnavigation of the globe each, they crossed the finish line just 25 kilometres apart – the equivalent of barely two laps on the Nardò proving ground. Completing this around-the-world challenge twice within eight days underscores, in striking fashion, the exceptional long-term performance capability of the powertrain.

The relentless program required 3,177 laps of the 12.68‑kilometre Nardò circuit. Experienced racing drivers completed two‑hour shifts in the seemingly endless round-the-clock race. On average, the CONCEPT AMG GT XX drove more than 5,300 kilometres per day.

Conditions were also far from favourable. During the day, ambient temperatures rose up to 35 degrees Celsius in the shade – climbing even higher under direct sunlight on the exposed track. Yet the car’s revolutionary powertrain delivered flawless performance throughout.

The test was not only a feat of technology, but also of teamwork. From the pit crew handling charging and tyre changes, to the round-the-clock provision of fire and rescue services to the remote support room in Affalterbach, which was permanently connected to Nardò via remote diagnostics. External specialists – including tyre supplier Michelin and charging station specialist Alpitronic – rounded off the expert crew.

“Mercedes-AMG and Formula 1 stand for innovation, intense competition, and pushing the boundaries of what is technically possible. Our company’s powertrains achieved groundbreaking successes in the very first road races in automotive history more than 120 years ago and have set benchmarks for decades. In the 1970s and 1980s, Mercedes‑Benz was a regular guest here at Nardò, setting numerous international speed and track records – most notably with the C111 as a visionary technology program. Back then, we demonstrated the performance capabilities of innovative diesel and petrol powertrains. Now, with the CONCEPT AMG GT XX technology programme, we are entering a new dimension of performance – this time with fully electric drive. The goal is to redefine the limits of what is technically possible in the age of electric drives. So what could be more fitting than to go chasing records once again? Our mission: to redefine the very standards of performance with groundbreaking technologies and innovations. The motivation and dedication of the cross-functional team from Mercedes-AMG, Mercedes-Benz, Mercedes-Benz Mobility, and our F1 engine experts at Mercedes-AMG High Performance Powertrains throughout the entire preparation phase were boundless. I am immensely proud of the unprecedented achievement of the entire team in this unique record drive.”
Markus Schäfer, Member of the Board of Management of Mercedes‑Benz Group AG. Chief Technology Officer, Development & Purchasing

A new dimension in electric endurance

The revolutionary drive concept with three innovative axial flux motors and a high-performance battery developed from scratch enabled a new dimension of continuous electric power and ultra-fast charging. This meant that the CONCEPT AMG GT XX could be pushed to its limits time and again during testing at Nardò, delivering a new level of continuous performance that was previously almost unthinkable in the world of electric vehicles. Even under extreme driving conditions, the batteries remained within an optimum temperature range – which not only ensured performance on the track but also enabled extremely fast charging.

Added to this are the axial flux motors, which are considerably more compact and lighter but above all significantly more powerful than conventional electric motors. The power density of axial flux motors is around three times higher. This enables top-level driving performance that can be reproduced very frequently and repeatedly.

Three axial flux motors and a directly cooled battery concept

The CONCEPT AMG GT XX generates a peak output of over 1,000 kW, which corresponds to more than 1,360 hp. This output is achieved by the three innovative motors integrated into high-performance electric drive units (HP.EDU) on the front and rear axles. The rear axle has two oil-cooled axial flux motors, which are combined with compact gearboxes and one inverter each in a single housing. The front electric drive acts as a booster motor and is only activated when needed to provide additional power or traction.

Axial-flux motors offer enormous advantages over conventional electric motors: they are significantly more powerful while also being lighter and more compact. Their power density is roughly three times higher, while weighing less and requiring only one third of the installation space. The units deliver higher continuous output and greater torque.

The foundation for these groundbreaking motors was originally developed by British electric motor specialist YASA – a wholly owned subsidiary of Mercedes-Benz AG. But it was Mercedes-AMG that, in close collaboration with YASA, elevated this concept to an entirely new performance level for series production in AMG.EA vehicles.

The vehicle’s high-performance battery is a completely new development from Affalterbach, inspired by Formula 1. It enables a high power output that can be called up frequently and repeatedly, contributing to the vehicle’s outstanding overall performance. The battery uses newly developed cylindrical NCMA cells, which offer efficient cooling and a high energy density of over 300 Wh/kg thanks to their tall and narrow format. The laser-welded aluminium cell housing improves electrical and thermal conductivity and contributes to the battery’s robust and long-lasting performance.

The battery cells are intelligently and directly cooled by an electrically non-conductive oil, which optimally regulates the temperature of each of the more than 3,000 cells. This cooling ensures even heat dissipation and supports the high continuous power potential of the energy storage system. The voltage of over 800 volts reduces weight through lighter cabling and shortens charging times, while intelligent thermal management precisely controls the temperature of the cells to ensure maximum performance even under intensive use.

This enables the CONCEPT AMG GT XX to charge extremely quickly: the technology platform charges at over 850 kW across a wide range of the charging curve. In just five minutes, it can recharge enough energy for a range of around 400 kilometres (WLTP) – equivalent to the distance from Nardò to Naples.

CONCEPT AMG GT XX records for battery-electric vehicles

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