Spied: AMG's New 4-Door Supercar Caught Testing In the Alps

The production version of the AMG GT XX looks a lot like the concept shown earlier this week.

Photo by: YouTube

By: Brian Silvestro

Jun 27, 2025 at 3:00pm ET

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Hot on the heels of the AMG GT XX concept's reveal on Tuesday, spy videographers have caught Mercedes testing the production version gliding stealthily through the Alps.

Expected to share much of the concept's design, AMG's all-electric, four-door supercar wears the same sleek fastback bodylines as the GT XX, albeit heavily camouflaged in a patterned wrap. The massive grille seems to be making a return, as do the circular-pattern taillights. But the headlights are notably different, with a more production-ready tri-star design, inspired by the brand's logo.

Though we never see this test mule pull off any quick corners or hard accelerations, we do get a taste of its sound. That's right, this EV isn't silent. There's a distinct engine-like idle emanating from underneath that camouflage, a feature hyped up by executives at the concept's reveal on Wednesday. There's not much to glean from the sound itself—it doesn't seem like a burbling V-8 to us—but it's also likely not finalized. So take the noise with a grain of salt, for now.

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As for performance, there should be a lot of it. The AMG GT XX concept is rated at 1,340 horsepower thanks to three axial-flux motors, two at the rear, and another up front. It runs on an 800-volt architecture for ultra-quick charging and uses direct-cooled cylindrical battery cells for better cooling attributes.

While that power figure might not be the same, it's very likely the production car will carry this same powertrain setup when it's revealed later this year. As for pricing, the AMG GT EV will likely compete directly against its closest segment rival, the Porsche Taycan, which starts at $101,395.