- mercedes-amg has confirmed an even higher-performance gt four-door, and it could have upward of 800 horsepower.
- there's a "v8 biturbo e performance" badge on the fender, meaning it should use amg's twin-turbo 4.0-liter v-8 paired with a more powerful hybrid system.
- the new model is rumored to be called the gt73, and we expect it'll cost close to $200,000.
mercedes has a lineup of electric vehicles on the way under the eq name, and its amg high-performance wing will dabble with them as well. however, mercedes-amg also plans to have its entire lineup employ hybrid powertrains soon, including this upcoming electrified version of the gt four-door, likely named the gt73, which will be targeted straight at the 690-hp porsche panamera turbo s e-hybrid.
amg hasn't shared any details on the gt73's powertrain yet, but we expect it to use a twin-turbocharged 4.0-liter v-8, which makes 630 horsepower in the gt63 s, in conjunction with a more powerful electric motor totaling around 800 horsepower. the 73 will need to have different type of hybrid system than the lesser gt four-door models (gt 53/gt 43), which use a 3.0-liter inline-six assisted by a small electric motor—and, in the gt53's case, an electric supercharger—that adds no additional peak power. in our testing, the v-8-powered gt63 s hit 60 mph in 2.9 seconds, so it's safe to say the 73 will have acceleration that borders on reality-warping. as with other gt four-door models, we expect all-wheel drive to help more of the power get to the ground.
a "v8 biturbo e performance" badge (pictured above) adorns the front fender, and amg says that the rest of its upcoming high-performance hybrids will fall under that e performance name as well. besides that, the gt73 should look similar to the current top-spec gt63 s with a gloss black front fascia. it's also wearing amg's black cross-spoke wheels, which are available on the 63 and 63 s.
we'll know more about the mercedes-amg gt73 soon, and it should arrive by the end of the year. the current top-of-the-line gt63 s starts at $162,950, so expect the 73 to approach $200,000.