Porsche isn’t building a true supercar right now. There’s an unsightly gap where the successor to the 918 Spyder should be. Into that vacuum, Porsche-adjacent companies are very happy to pour their idea of a 911-ish supercar. There’s the Kalmar 9X9. The Tuthill GT-One. The RML GTH. And the Singer DLS-T.

And now there’s Marc Philipp Gemballa’s take: the new Marsien GT.

PHOTO BY Marc Philipp Gemballa

PHOTO BY Marc Philipp Gemballa

The brainchild of late Porsche tuner Uwe Gemballa’s actual child, the Marc Philipp Gemballa Marsien GT is the road-focused version of the Marsien off-road supercar that we exclusively drove (and jumped) back in 2024.

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The easy thing to do would be to snip the suspension, fit lower-profile tires, and say ‘job done.’ But no. Marc Philipp Gemballa says the only panels the cars share are the doors and the roof—which is now home to a huge intercooler-feeding scoop.

PHOTO BY Marc Philipp Gemballa

The all-carbon bodywork now features a central-bonnet fuel filler, square-jawed 911 GT2 RS-style front intakes, reprofiled flanks, and an aggressive diffuser. As well as new wheels and tires and completely bespoke lower suspension (still with a 100mm nose lift), the GT also gets a quad-exhaust system from Akrapovic instead of twin pipes.

Does that mean more power? Heck, yeah. We’re told that every single buyer of the Marsien ticked the box to upgrade the RUF-tuned twin-turbo flat-six from 750hp to 830hp. So the standard output for the GT is—you guessed it—830hp. In the works is an upgrade to the upgrade that takes the GT beyond 900hp. Wonder how many of the 30 buyers will tick that?

PHOTO BY Marc Philipp Gemballa

With 830hp, the claim is 0-100kph in 2.4sec and 330kph flat out. There’s no heady downforce claim or promise of a Nürburgring-munching lap time because, somewhat refreshingly, this machine is intended as a usable road car, not a track-attack quasi-racer.

To create this new-age Porsche 959 complete with pumped-out tracks and huge hooped rear wing, Marc Philipp Gemballa converts a 992.1 Turbo donor car: Ideally a Turbo S, strictly a coupe, and not the current Turbo S with complicated e-turbos. That also means you get some features inside that we miss in the current Turbo S. Things like a physical rev counter and a twisty engine starter.

PHOTO BY Marc Philipp Gemballa

Twisting the drive mode toggle on the steering wheel pops up the active aero flaps in the front wing and on the main spoiler—think AMG One hedgehog mode. A fun party piece, but the details don’t stop there.

Look at the center console. Not only is it angled more steeply than in a standard 911 to pay homage to the central ‘bridges’ in the Porsche Carrera GT and 918 Spyder, the PDK gear selector is also replaced with a manual-esque lever that looks very Carrera GT-ish. Nice.

PHOTO BY Marc Philipp Gemballa

PHOTO BY Marc Philipp Gemballa

There’s also more suede trim to the console to cover up Porsche’s tiresome use of cheap piano-black plastic. The Marsien GT even bins Porsche’s disliked pop-out door handles, much like Porsche’s own GT department does on the GT3 RS and the 911 S/T.

But then you’d hope it looks and feels expensive, because the Marsien GT costs five times more than a new 911 Turbo S. Here’s how that breaks down.

PHOTO BY Marc Philipp Gemballa

The ‘GT’ conversion fee is €770,000, or about P54.4 million. Plus taxes. Plus a donor car. Plus options. Now, donor 992 Turbo S coupes currently start at around £120,000 (around P9.92 million). The average spend for options on the 40 off-roading Marsiens has been €227,000 (P16 million). All in, you’re looking at a massive sum in pretty much whatever currency you’re trading in.

In our current crazy world of hypercars and Porsche-based project cars, that’s actually toward the reasonable end of the market. And besides, Porsche doesn’t appear to have any immediate plans to build a new hypercar...

More photos of the Marc Philipp Gemballa Marsien GT:

PHOTO BY Marc Philipp Gemballa

PHOTO BY Marc Philipp Gemballa

PHOTO BY Marc Philipp Gemballa

PHOTO BY Marc Philipp Gemballa

PHOTO BY Marc Philipp Gemballa

PHOTO BY Marc Philipp Gemballa

NOTE: This article first appeared on TopGear.com. Minor edits have been made.