Theon Design’s 10th Anniversary Coupe Beats A 992 GT3 RS On Power-To-Weight
Theon Design is celebrating ten years of bespoke Porsche builds with a Coupe that outguns the factory’s own halo car on paper. Revealed this morning, the Oxfordshire outfit’s latest commission is a 964-based Coupe making 413 hp and 322 lb-ft from a 4.0-liter flat-six, wrapped in an F1-grade carbon body and tipping the scales at just 2,535 lbs. That combination gives it a better power-to-weight ratio than Porsche’s own 992 GT3 RS.
The anniversary reveal comes with two more pieces of news: the first customer example of Theon’s standalone Theon R supercar is now in build, and the company is formally expanding its operations into North America with a white-glove service for buyers on this side of the Atlantic.
A Decade Of Hand-Built 964s Culminates In This Oak Green Coupe
The new Coupe took 18 months to complete, built in close collaboration with a British client at Theon’s headquarters in Oxfordshire, a stretch of England’s so-called Motorsport Valley that’s also home to several Formula 1 teams. That context matters: Theon describes the build as blending motorsport engineering DNA with hand-crafted, OEM-grade finishing, and the spec sheet backs that up.
Starting from a 964-generation 911 donor, the car now wears a carbon-fiber body built to F1-grade standards. Underneath, it runs TracTive semi-active suspension with bespoke spring rates, tuned specifically for UK roads, on 17-inch wheels. Stopping power comes from 993 RS brakes, and power goes through a 5-speed G50 manual gearbox rather than anything modern or paddle-shifted. The finished car wears Oak Green Neo Metallic, a reworked take on a classic Porsche hue, over a Beechnut leather interior.
Why The Power-To-Weight Number Matters
A 992 GT3 RS is a 4.0-liter, naturally aspirated, 511 hp track weapon that Porsche builds in-house with factory resources most independent shops can’t match. Theon’s Coupe makes less outright power, but at 2,535 lbs, it undercuts the GT3 RS’s curb weight enough to come out ahead on power-to-weight. For a small bespoke builder working from a donor car rather than a clean-sheet factory platform, that’s a notable result, and it’s the kind of claim Theon is clearly building its anniversary messaging around.
The Theon R Supercar And A Push Into North America
Alongside the Coupe reveal, Theon confirmed that the first customer example of its Theon R, a standalone supercar rather than a reimagined 911, is now in build. The R is targeting over 500 bhp and a sub-2,205 lbs curb weight, figures that would put it in genuinely exotic territory if the final car lands close to that target.
Theon is also expanding into North America with a white-glove service aimed at clients on that side of the Atlantic, and it has launched an online configurator, letting prospective buyers start sketching out their own build without an initial trip to Oxfordshire. For a company that’s built its name on 18-month, one-client-at-a-time commissions, that’s a meaningful step toward accessibility.
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