Theon-Design-Porsche-911-

Theon Design has revealed its latest bespoke Porsche 911 (964) commission, a comprehensively re-engineered, carbon-bodied coupe powered by a naturally aspirated 4.0-liter flat-six producing 421 bhp.

Developed in close collaboration with its owner, the build was tailored to individual preferences, with every aspect of the car’s specification, driving dynamics, and overall character shaped around the client’s requirements.

Power is sent to the rear wheels through a six-speed manual gearbox, while TracTive semi-active suspension and a front axle lift system enhance usability and performance. Weighing just 1,146 kg, the car boasts a power-to-weight ratio that surpasses that of the current 992.2 GT3, while retaining the analog driving experience that underpins Theon Design’s philosophy.

A study in contrast

Finished in Crayon Grey with Lizard Green accents, the latest Theon commission demonstrates a restrained approach to contrast, favoring subtle detailing over visual excess.

Its full carbon-fiber bodywork is complemented by smoked front and rear light lenses. At the same time, brushed Eclipse exterior trim and a matching ‘Turbonite’ Porsche bonnet crest add a contemporary edge to the classic silhouette.

Seventeen-inch Anthracite and Black wheels frame RS brake calipers finished in Lizard Green, introducing a controlled splash of color within an otherwise understated palette.

As with every Theon commission, steel doors have been retained to preserve the familiar tactile feel of a classic 911, maintaining a tangible connection to the original donor car beneath the extensively revised exterior.

Performance, defined by calibration

At the heart of the build is a naturally aspirated 4.0-liter flat-six engine producing 421 bhp and 324 ft-lbs of torque.

Controlled by a MoTeC ECU and PDM system, the engine features carbon-fiber tinware and carbon-infused intake trumpets. A drive-by-wire throttle system offers selectable driving modes ranging from Town to Race, along with a further ‘Raucus’ mode that delivers full power, lifts the spoiler, and adds a loud exhaust tone with pops and bangs – enabling the car’s character to be adapted to different driving environments.

The TracTive semi-active suspension system offers five adjustable settings, providing a broad spectrum of dynamic capability, from comfortable road driving to more focused performance use. Each setup is individually calibrated to suit the owner’s preferences rather than conforming to a fixed factory specification.

That level of personalization extends well beyond cosmetic choices. Engine mapping, suspension tuning, steering characteristics, and the car’s overall dynamic behavior are all developed around the client, ensuring each Theon delivers a driving experience as distinctive as its appearance.

Material clarity inside

Inside, the cabin mirrors the exterior’s design philosophy, combining lightweight carbon-fiber architecture with carefully selected materials and finishes.

Carbon-fiber panels are hand-trimmed in Licorice leather, complemented by subtle Lizard Green stitching across the cabin’s upper surfaces. Recaro RS seats continue the restrained aesthetic, while bespoke aluminum footboards, machined door handles, air vents, and dashboard inserts provide a precise visual and tactile contrast.

The instrument cluster has been uniquely configured with color-matched Crayon and Lizard Green detailing, reinforcing the cohesive design theme throughout the cabin.

Technology is integrated discreetly. An original Becker Mexico head unit is paired with a Hertz amplifier and six Focal speakers, while a carbon-fiber center console incorporates wireless charging and a concealed phone extension.

Manthey EMA enters the 24h Nürburgring

Built as a singular object

Each Theon commission requires approximately 6,000 hours to complete and is developed through a close partnership between the client and the studio. From the earliest concept discussions to final calibration and delivery, owners work directly with Theon to create a car tailored to their tastes, driving style, and intended use.

Built in Oxfordshire, within the UK’s renowned Motorsport Valley, every Theon combines traditional craftsmanship with technologies and suppliers more commonly associated with Formula One and the aerospace sector. Carbon-fiber components are produced using motorsport-derived manufacturing techniques, while lightweight aerospace-grade electrical systems contribute to reduced weight and enhanced reliability.

Production remains intentionally limited. In 2026, only six customers worldwide will take delivery of a new Theon commission, allowing each project to receive the extensive development time and individual attention for which the company is known. This latest build exemplifies that approach, representing not a collection of selected options but a fully resolved design and engineering program in which aesthetics, performance, and intended use are considered as a whole. Theon Design continues to build a small number of cars each year from its Oxfordshire headquarters, with every commission offering a unique interpretation of the air-cooled 911. Prices for Theon commissions start from £430,000, excluding donor car, shipping, and local taxes.