From exquisitely reimagined Porsche 911 Coupés and Targas to the radical 500 bhp-plus Theon R, this Oxfordshire-based specialist represents a fascinating expression of modern automotive craftsmanship.
In an automotive world increasingly defined by electrification, digital technology and extraordinary performance figures, a select group of independent manufacturers and engineering specialists continues to pursue a very different philosophy.
One rooted in mechanical purity, timeless design and the emotional connection between driver and machine.
Among the most compelling names in this exclusive field is Theon Design, a British automotive design and engineering company dedicated to restoring and reimagining one of the most celebrated sports cars ever created: the air-cooled Porsche 911.
Based in Oxfordshire, at the heart of Britain’s renowned Motorsport Valley, Theon Design combines advanced engineering, traditional craftsmanship and an uncompromising attention to detail.
Its creations are not simply restored classics, nor are they conventional performance upgrades. Each is a comprehensive, individually commissioned reinterpretation of the Porsche 911, developed around the preferences and driving ambitions of its owner.
The result is a distinctive approach to the modern Porsche 911 restomod: preserving the analogue character that made the original an icon while introducing the precision, quality and sophistication expected of an exceptional contemporary sports car.
In 2026, as Theon Design celebrates its tenth anniversary, its expanding portfolio encompasses three principal interpretations of the classic 911: the Coupé, the Targa and the extraordinary lightweight R.
Theon Design: The Story Behind a British Automotive Specialist
Theon Design was founded in 2016 by automotive designer Adam Hawley and business and marketing specialist Lucinda Argy.
The company emerged from Hawley’s personal ambition to create his vision of the ultimate air-cooled Porsche 911.
With more than two decades of experience working with manufacturers including BMW, Jaguar and Lotus, Hawley brought an established understanding of automotive design, development and engineering to the project.
His objective was not to reinvent the 911 beyond recognition.
Instead, he sought to identify the qualities that made the classic Porsche so compelling and refine them through a combination of modern technology, engineering expertise and meticulous craftsmanship.
Lucinda Argy’s background in business strategy and brand development helped transform that original vision into an internationally recognised specialist company.
Together, the founders established a business built around a highly personalised commissioning process, where each automobile becomes a unique expression of its owner’s preferences.
What began as a personal engineering project evolved into a sophisticated operation bringing together specialists in vehicle design, powertrain development, chassis engineering, precision manufacturing and interior craftsmanship.
Today, Theon Design operates from a dedicated facility in Oxfordshire, applying expertise drawn from Britain’s extensive motorsport and automotive engineering industries.
Its guiding philosophy is summarised in three words:
Purity of Purpose.
Rather than pursuing performance figures in isolation, Theon Design seeks to create cars that feel cohesive, precise and deeply rewarding to drive.
Why the Porsche 964 Is the Foundation of Every Commission
At the centre of Theon Design’s philosophy is the Porsche 911 generation 964, originally produced between 1989 and 1994.
The 964 occupies an important position in Porsche history.
It retained the unmistakable silhouette and air-cooled flat-six character of earlier generations while introducing substantial advances in chassis design, refinement and everyday usability.
For a specialist seeking to combine classic aesthetics with modern performance, it provides a particularly attractive engineering foundation.
Every Theon Design commission begins with an existing Porsche 964 donor vehicle.
The car undergoes a comprehensive transformation, rather than receiving a collection of superficial modifications.
Its body is stripped back, the structure is assessed and strengthened, and individual components are redesigned or refined to meet the requirements of the project.
Advanced digital scanning and computer-aided design technologies allow Theon Design to model components with exceptional precision.
This digital approach is combined with traditional hand-finishing, ensuring that every exterior panel, mechanical component and interior detail contributes to the overall result.
Carbon fibre, precision-machined aluminium and carefully selected lightweight materials are employed where appropriate, without unnecessarily compromising the original car’s character.
The aim is to retain the essence of a classic Porsche 911 while substantially enhancing its performance, dynamics, refinement and quality.
Theon Design refers to this philosophy as OEM+: an approach intended to combine the precision and consistency associated with original equipment manufacturers with the individuality of bespoke automotive craftsmanship.
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The Theon Design Model Range: Three Interpretations of the Porsche 911
While every commission is unique, Theon Design’s portfolio is organised around three distinct configurations.
Each offers a different interpretation of the company’s central philosophy, from refined grand touring and open-air driving to uncompromising lightweight performance.
Theon Design Coupé: The Art of the Perfect Air-Cooled 911
The Coupé represents the purest expression of Theon Design’s original ambition.
Its design draws inspiration from some of the most celebrated Porsche 911 models, particularly the early RS and ST variants.
The familiar proportions of the classic 911 remain immediately recognisable, yet nearly every detail has been carefully reconsidered.
Subtle changes to the bodywork, wheel arches, bumpers, lighting and exterior trim create a more purposeful appearance without overwhelming the original design.
Depending on the commission, owners can specify traditional hand-crafted steel bodywork or lightweight carbon fibre components.
The extensive use of modern materials can significantly reduce weight, improving responsiveness and overall driving dynamics.
Under the rear engine cover, the Coupé can be equipped with naturally aspirated air-cooled flat-six engines in 3.6, 3.8 or 4.0-litre configurations.
Theon Design also offers the possibility of supercharged or turbocharged engines for clients seeking a different performance character.
The naturally aspirated configurations are particularly compelling because they preserve the sound, throttle response and mechanical character associated with the classic 911.
Depending on specification, the Coupé can produce more than 420 bhp, accompanied by substantially revised suspension, braking and chassis systems.
Power is delivered to the rear wheels through a manual transmission, maintaining the direct connection between driver and automobile.
Inside, Theon Design combines carefully selected leather, machined aluminium controls, bespoke instrumentation and discreet modern conveniences.
The result is an interior that recalls the simplicity of earlier Porsche models while delivering a level of craftsmanship and refinement appropriate to a contemporary luxury automobile.
The Coupé is particularly appealing to enthusiasts who value balance, engineering quality and timeless design over visual excess.
Theon Design Targa: Open-Air Driving With Modern Precision
The Targa offers a different interpretation of the same philosophy.
Retaining the unmistakable profile of the classic Porsche 911 Targa, it introduces the additional sensory dimension of open-air motoring.
The removable roof and distinctive Targa roll bar create a driving experience closely connected with the surrounding environment.
However, achieving the precision and structural rigidity expected of a modern performance automobile presents particular engineering challenges.
To address these, Theon Design has developed a sophisticated carbon fibre chassis-strengthening system.
Bespoke structural components are bonded to the floor of the original chassis, improving torsional rigidity without introducing excessive weight.
This solution draws upon advanced composite construction techniques associated with high-level motorsport.
The result is a Targa intended to combine the enjoyment of open-air driving with the chassis control and responsiveness associated with the company’s Coupé commissions.
Like the Coupé, the Targa is available with a range of air-cooled flat-six powertrains and individually tailored mechanical specifications.
Optional semi-active suspension technology further expands its capabilities, allowing the damping characteristics to be adapted to different driving conditions.
One notable commission, the GBR005 Targa revealed in November 2024, demonstrates the potential of this approach.
Powered by a highly developed 3.8-litre naturally aspirated flat-six producing 407 bhp, the car combines a lightweight carbon body with a six-speed manual transmission and sophisticated adaptive suspension.
The Targa also highlights the aesthetic possibilities of Theon Design’s bespoke philosophy.
Exterior colours, interior materials, contrasting finishes and individual detailing can be specified to create an automobile that reflects its owner’s personal style.
For collectors seeking the character of an early Porsche 911 with the additional pleasure of open-air driving, the Targa offers an especially attractive proposition.
Theon R: The Ultimate Lightweight Air-Cooled Porsche 911
If the Coupé represents Theon Design’s vision of the refined analogue sports car, and the Targa introduces an open-air dimension, the R takes the philosophy to a considerably more extreme level.
Developed as the company’s most focused interpretation of the 964 platform, the Theon R places extraordinary emphasis on reducing weight, maximising driver engagement and achieving exceptional mechanical performance.
At the heart of the project is an extensively developed 4.0-litre air-cooled flat-six engine.
Featuring a sophisticated 24-valve, dual overhead camshaft configuration, the engine produces more than 500 bhp and is designed to rev beyond 9,000 rpm.
Its character draws inspiration from Porsche’s celebrated motorsport heritage, combining high-revving performance with the unmistakable sound of an air-cooled flat-six.
Power is transmitted to the rear wheels through a six-speed H-pattern manual gearbox and a limited-slip differential.
However, the R’s defining characteristic is not simply its engine output.
It is its extraordinary power-to-weight ratio.
Theon Design targets a fully fluid-filled weight of less than 1,000 kilograms, achieved through an extensive programme of lightweight engineering.
Carbon fibre is employed throughout the body and interior, including components developed with specialist suppliers experienced in Formula One composite construction.
The original chassis is comprehensively strengthened through seam welding and advanced carbon fibre structural reinforcement.
A bespoke Motion Control Suspension system provides extensive adjustability, allowing the car to be configured for demanding road driving or circuit use.
The aerodynamic package incorporates a fixed rear wing, front splitter, rear diffuser, roof channel and flat-floor elements.
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According to Theon Design’s published performance targets, the R is capable of accelerating from 0 to 60 mph in approximately three seconds, with 100 mph reached in around 6.5 seconds.
Its power-to-weight ratio exceeds 500 bhp per tonne, placing it in remarkable territory for a road car based on a classic Porsche platform.
Yet the R is not conceived merely as a collection of impressive specifications.
Its purpose is to deliver an intensely communicative, mechanical driving experience, combining the character of a classic 911 with an engineering philosophy inspired by modern high-performance and motorsport applications.
As of November 2026, Theon Design has confirmed that construction of the first R is underway.
A Bespoke Approach: Every Porsche 911 Is Individually Commissioned
One of the most distinctive aspects of Theon Design is the degree of personalisation available to its clients.
Unlike conventional limited-production sports cars, where buyers choose from a predefined list of options, Theon Design approaches each project as an individual commission.
The process begins with detailed discussions about the owner’s preferences, expectations and intended use.
Some clients may prioritise an understated aesthetic inspired by classic Porsche models.
Others may prefer a more expressive design incorporating contemporary colours, contrasting materials and distinctive mechanical specifications.
The level of customisation extends far beyond exterior paint and interior upholstery.
Clients can influence engine configuration, suspension characteristics, transmission specification, chassis setup, wheel design and numerous other elements.
The interior presents further opportunities for personal expression.
Fine leather, Alcantara, machined aluminium, bespoke stitching and individually designed instruments allow Theon Design to create a cabin that feels both historically authentic and entirely personal.
The company’s use of advanced digital design technology helps ensure that these individual details are integrated into a coherent overall design.
This combination of client collaboration, engineering precision and hand-built craftsmanship is central to the appeal of a Theon Design commission.
Engineering Excellence: Where Motorsport Meets Traditional Craftsmanship
The geographical location of Theon Design is far from incidental.
Oxfordshire forms part of the United Kingdom’s Motorsport Valley, a region internationally recognised for its concentration of high-performance engineering companies, specialist manufacturers and motorsport expertise.
This environment provides access to sophisticated technologies and suppliers more commonly associated with professional racing and advanced automotive development.
Theon Design uses these resources to improve the construction, performance and reliability of its cars.
Carbon fibre body panels are digitally modelled for dimensional accuracy and consistent fit.
Lightweight electrical systems reduce unnecessary mass while incorporating modern functionality.
Revised suspension geometry, advanced damping systems and upgraded braking components transform the dynamic capabilities of the original 964 platform.
The powertrains undergo equally extensive development.
Although the engines retain their air-cooled, horizontally opposed architecture, modern engine management and carefully engineered internal components improve output, response and usability.
The result is an approach where advanced technology supports, rather than replaces, the analogue driving experience.
This distinction is particularly important.
Theon Design does not attempt to transform the classic Porsche 911 into a modern digital sports car.
Instead, it uses modern engineering to enhance the qualities that made the original compelling.
Notable Theon Design Commissions
The individuality of Theon Design’s work becomes particularly evident when examining some of its completed projects.
Each vehicle illustrates a different combination of aesthetic restraint, mechanical specification and personalisation.
GBR007: Understated British Elegance
Unveiled in January 2026, GBR007 demonstrates the appeal of a restrained, classically inspired specification.
Finished in Medium Ivory with Grand Prix White detailing, the carbon-bodied Coupé was developed for a British customer seeking an exceptionally refined road-focused Porsche 911.
Its naturally aspirated 4.0-litre engine produces approximately 420 bhp, while its weight of around 1,150 kilograms delivers a remarkable combination of performance and agility.
Carefully selected suspension settings and 17-inch wheels contribute to a driving character tailored specifically for British roads.
MEX001: Bespoke Design With a Sporting Character
Revealed in April 2026, MEX001 offers another interpretation of the Theon Design philosophy.
Built around a Porsche 964 Carrera 4 donor, the car was converted to rear-wheel drive and extensively reengineered.
A naturally aspirated 3.8-litre flat-six produces 407 bhp, while its lightweight carbon construction contributes to a finished weight of approximately 1,150 kilograms.
Individual exterior detailing, champagne accents and a bespoke RS-inspired rear spoiler distinguish the commission.
According to Theon Design, the project represents approximately 6,000 hours of specialist work.
GBR008: Carbon Fibre and Contemporary Precision
Presented in June 2026, GBR008 combines a 4.0-litre naturally aspirated engine producing 421 bhp with a highly individual exterior specification.
Finished in Crayon Grey with Lizard Green accents, it demonstrates the ability to integrate distinctive visual elements into a cohesive design.
The carbon-bodied Coupé weighs approximately 1,146 kilograms with fluids, while semi-active TracTive suspension and a six-speed manual gearbox underline its driver-focused character.
Like every Theon Design commission, GBR008 was developed in close collaboration with its owner, with particular attention to the intended driving experience.
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Celebrating Ten Years: A New Chapter in 2026
The year 2026 marks an important milestone for Theon Design.
A decade after its foundation, the British specialist continues to expand its international presence while maintaining an exceptionally limited production philosophy.
To celebrate its tenth anniversary, Theon Design has revealed another individually commissioned Porsche 911, finished in Oak Green Neo Metallic.
The carbon-bodied Coupé combines a naturally aspirated 4.0-litre flat-six producing approximately 419 bhp with a five-speed manual transmission and a finished weight of around 1,150 kilograms.
Its specification emphasises elegant detailing, lightweight construction and a carefully tailored driving character.
The project required approximately 18 months to complete, highlighting the considerable development and craftsmanship involved in each commission.
Alongside the anniversary celebration, Theon Design has introduced an online configurator covering its Coupé, Targa and R programmes.
The company is also expanding its presence in North America through a dedicated concierge service associated with Humble House.
These developments represent a natural evolution for an increasingly internationally recognised specialist.
Rather than abandoning its bespoke roots in pursuit of higher production volumes, Theon Design continues to emphasise the exclusivity and individuality of each automobile.
Theon Design Pricing and Exclusivity
Theon Design occupies the upper reaches of the bespoke Porsche restomod market.
The considerable engineering development, extensive use of lightweight materials and thousands of specialist working hours contribute to pricing that reflects the individual nature of each commission.
In November 2026, reported pricing for Theon Design projects begins at approximately £435,000, with the final cost dependent on the chosen specification and commission.
Prospective clients should confirm current pricing, donor vehicle requirements, taxes and delivery arrangements directly with the company.
Production volumes remain deliberately restricted.
For 2026, Theon Design indicated that only six clients worldwide would take delivery of newly completed commissions.
This level of exclusivity positions the company within a specialist segment of the collector car market, where rarity, personalisation and craftsmanship are valued alongside outright performance.
Theon Design and the Rise of the Porsche 911 Restomod
The growing international interest in restomod Porsche 911s reflects a broader shift in enthusiast preferences.
For many collectors, the attraction of an exceptional automobile extends beyond horsepower, acceleration and technological sophistication.
Mechanical engagement, individuality and emotional character have become increasingly significant considerations.
Companies such as Singer Vehicle Design, Gunther Werks and Theon Design have helped establish a market in which classic Porsche architecture is reinterpreted through advanced engineering and bespoke craftsmanship.
Although each company follows a different technical and aesthetic philosophy, they share an appreciation for the enduring appeal of the air-cooled 911.
Theon Design distinguishes itself through its particular emphasis on design-led engineering, detailed digital development and the pursuit of an OEM-like level of precision.
Its creations are intended to feel exceptionally cohesive, combining the charm of a classic sports car with the confidence and sophistication of a thoroughly reengineered automobile.
In an era when high-performance cars are becoming increasingly complex, such an approach carries considerable appeal.
The Enduring Appeal of an Analogue Masterpiece
Theon Design represents a compelling vision of what the classic Porsche 911 can become when heritage, engineering and craftsmanship are treated with equal importance.
From the elegant Coupé and sensory Targa to the extreme lightweight R, each model offers a different interpretation of the same underlying ambition.
To create a driving experience that is more precise, more rewarding and more deeply connected to the person behind the wheel.
The company’s development over its first decade demonstrates the continued relevance of the air-cooled 911 in a rapidly changing automotive landscape.
What makes Theon Design particularly fascinating is not simply its impressive engineering or extraordinary attention to detail.
It is the conviction that the finest sports cars are defined as much by how they make their drivers feel as by what they can achieve.
For collectors and enthusiasts who value mechanical authenticity, timeless design and individual craftsmanship, Theon Design offers a distinctive interpretation of one of the automotive world’s greatest icons.
Some automobiles are designed to define the future. Others remind us why the past remains extraordinary.
Theon Design’s reimagined Porsche 911s successfully explore the space between the two.
Discover Theon Design
Explore the company’s bespoke Porsche 911 commissions, technical philosophy and complete model range through the official Theon Design website.
Theon Design independently restores and modifies existing Porsche 911 vehicles and is not affiliated with or endorsed by Porsche AG.