An 840-horsepower, 2,600-pound, twin-turbocharged Porsche 911 Speedster dressed head to toe in Iron Man cosplay just rolled out of Gunther Werks’ shop. They’re calling it Project Endgame, and it is exactly as unsubtle as that sounds.
The car is built on a 993-generation 911, the last of the air-cooled Porsches and the platform Gunther Werks has made its name reworking into jaw-dropping restomods. This time, the California-based coachbuilder went further than ever. Project Endgame is a one-off Turbo Speedster and the only open-top version of Gunther Werks’ new turbocharged program, marking the final Speedster the company will ever produce.
True Candy Red carbon fiber covers the body. Gold accents trace the details. Twenty-four-karat gold plating adorns the air-to-water intercoolers and a gem-studded shift lever arranged in a 1-through-6 pattern.
Gunther Werks says the shifter delivers “a satisfying snap.” If you don’t get that reference, you haven’t watched enough Marvel movies.
The company hasn’t named the client, but the breadcrumbs are practically screaming. Red and gold livery. A nod to Tony Stark’s suit-delivery pod mounted between the seats. The name itself lifted directly from the 2019 Avengers film that served as Robert Downey Jr.’s final appearance as Iron Man.
If this car wasn’t commissioned by RDJ, then whoever did order it has some explaining to do. Otherwise the theme lands somewhere between bold homage and expensive fan fiction.
Regardless of who’s writing the check — and at north of $1.5 million, it’s a serious check — the mechanical package deserves respect on its own terms. Rothsport Racing built the twin-turbocharged 4.0-liter flat-six, which pumps out 840 horsepower and 660 pound-feet of torque while spinning to 7,500 rpm. Individual throttle bodies suggest the engine note is nothing short of savage, and all of it routes through a six-speed manual to the rear wheels only.
At 2,600 pounds dry, the power-to-weight ratio is borderline reckless. That’s supercar territory, delivered in a package that predates traction control as a standard feature. No dual-clutch gearbox, no all-wheel drive, no electronic nannies parsing out the fury — just three pedals, a flat-six scream, and 840 reasons to respect the throttle.
Project Endgame also signals a transition for Gunther Werks. The Speedster program technically wrapped in 2023 after 25 open-top builds. This car was an exception, built at the client’s specific request and powered by an engine configuration no other Speedster will ever carry.
Going forward, Gunther Werks is launching GWX, a bespoke coachbuilding division that will handle commissions like this one. Project Endgame is both a farewell and a grand opening.
The GW Turbo coupe on which this Speedster is based is part of a planned 75-unit production run. But Peter Nam, Gunther Werks’ CEO and founder, made clear that Endgame stands alone. “Every element was precision-engineered in absolute collaboration with the client,” Nam said. “Endgame will be the only Speedster powered by an air-cooled turbocharged engine, undoubtedly making it our fastest Speedster to date.”
There’s a fine line between automotive art and themed spectacle. Project Endgame walks it with 840 horsepower and a straight face. The Marvel wrapping will divide opinion, but the engineering underneath won’t.
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