Theon Design has once again redefined the boundaries of air-cooled excellence with its latest bespoke commission. This 1990s-era 964 donor has been transformed into a lightweight, carbon-bodied marvel specifically tailored for the challenging surfaces of British B-roads. By focusing on a “pure expression” of the driving experience, the Oxfordshire-based firm has created a machine that speaks softly but carries a massive performance punch. The result is a timeless aesthetic paired with a power-to-weight ratio that eclipses many modern supercars.
Carbon Fiber Construction and Medium Ivory Aesthetics
The foundation of this Theon Design 911 is a bare-metal shell that has been seam-welded and 3D scanned for absolute precision. Engineers then draped the reinforced platform in lightweight carbon fiber bodywork, significantly reducing the total vehicle weight to just 1150kg. A sophisticated 20-stage paint process applies a classic Medium Ivory finish, complemented by Grand Prix White racing stripes. Polished Eclipse Chrome brightwork and champagne-colored accents on the wheels and mirrors complete the understated look. This subtle exterior ensures the car remains elegant rather than aggressive in public spaces.
Chassis Tuning for the British Landscape
Unlike many high-performance builds that are too stiff for real-world use, this commission features a touring-focused suspension setup. Theon Design utilized TracTive semi-active dampers and softer springs to provide exceptional compliance on pock-marked roads. A five-stage adjustable dial mounted on the steering column allows the driver to toggle between a supple gait and track-ready stiffness. Bespoke 17-inch Fuchs-style wheels offer a larger tire sidewall, which further improves ride quality and mechanical grip. This specific calibration ensures the car remains composed whether cruising the motorway or attacking a Welsh mountain pass.
RSR Inspired Soundtrack and Engine Detail
The heart of the build is a 4.0-liter air-cooled flat-six engine that breathes through dramatic open intake trumpets. This setup produces a visceral intake rasp reminiscent of the legendary 1970s RSR race cars. Every mechanical component is treated with a period-correct yellow chromate protective coating to honor Porsche’s original engineering standards. A switchable exhaust system provides the flexibility to remain discreet in residential areas or unleash a full flat-six symphony on the open road. Independent throttle bodies guarantee that every millimeter of pedal travel translates into instant forward momentum.
Exquisite Cabin Craftsmanship and Audio
The interior of the Theon Design 911 is a masterclass in tactile luxury, featuring a mix of Tobacco nubuck and Licorice semi-aniline leathers. Recaro CS seats with satin carbon fiber backs provide modern support while maintaining a classic sporting silhouette. Theon’s proprietary Interior Aluminium Pack replaces plastic factory components with billet aluminum vents, handles, and knobs. For long-distance touring, a rear-seat delete provides a leather-trimmed storage deck complete with a bespoke matching luggage set. A hidden Audison-based audio system offers high-fidelity sound without cluttering the analog aesthetic of the dashboard.
Power, Engine Specs, and Performance
The 4.0-liter naturally aspirated flat-six produces a staggering 420bhp at 7,600rpm and 324lb/ft of torque. This output equates to well over 100bhp per liter, achieved through expert internal balancing and state-of-the-art ignition systems. Power is sent to the rear wheels via a 993 RS-spec six-speed manual gearbox, which has been enhanced for even crisper shifts. With a total weight of only 1150kg, the car can sprint from 0-60mph in under 4 seconds. The brake system utilizes a 993 RS setup for fade-free stopping power that matches the car’s immense straight-line speed.
Summary of the Medium Ivory Commission
This latest project from Theon Design proves that modern performance and classic elegance are not mutually exclusive. By obsessively optimizing every component from the ground up, the team has delivered a 911 that feels both familiar and entirely new. It honors 60 years of heritage while leveraging the cutting-edge technology found in the heart of the UK’s Motorsport Valley. This commission is a deeply personal expression of automotive art that prioritizes the analogue joy of driving. It stands as one of the most resolved air-cooled Porsches currently in existence.
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Source: Theon Design
