Jaguar XJ6/XJ12 specialist

“We offer a complete range of services for Jaguar XJ models, all carried out in-house and tailored to the way each car is used.”

Services for Jaguar’s great saloons

Copthorne Classics is a family-run Jaguar specialist with extensive experience across Jaguar XJ models, including XJ6 and XJ12 in Series 1, Series 2 and Series 3 form, as well as Daimler Sovereign equivalents.

These cars occupy a unique place in the Jaguar story – combining performance, refinement and everyday usability in a way few classics can match. When properly maintained and understood, they remain some of the most rewarding classic cars to own and drive.

We provide complete care for Jaguar XJ models, from routine servicing and fault-finding through to full restoration, engine rebuilds and long-term development.

A Jaguar XJ specialist in real-world use

Unlike more occasional-use classics, many XJ models are driven regularly – for commuting, touring and long-distance use. This places different demands on the car, and on the way it is maintained and developed.

Our approach reflects this. Every XJ is assessed not just as a classic, but as a car in use – with careful attention paid to reliability, drivability and comfort, alongside originality where appropriate.

We work across the full range, from early Series 1 cars through to later Series 3 and V12 models, with a detailed understanding of their differences in cooling, fuelling, suspension and electrical systems.

Jaguar XJ services

We offer a complete range of services for Jaguar XJ models, all carried out in-house and tailored to the way each car is used.

Routine servicing and maintenance form the foundation of reliable ownership, whether the car is used regularly or more occasionally. Alongside this, we undertake full engine rebuilds for both six-cylinder and V12 models, from standard specification through to fast road development, always with a focus on smooth delivery, durability and real-world performance.

We also carry out full and partial restorations, including structural work, mechanical systems and detailed reassembly. Projects can be delivered in stages where required, with clear planning around scope, timing and budget.

Specialist knowledge extends to carburation and fuelling systems, cooling improvements, braking and suspension overhaul, and electrical systems – from fault-finding through to complete loom replacement. Each area is approached with the aim of producing a car that feels correct, dependable and enjoyable to use.

“For owners looking to use their cars more regularly, we offer a range of carefully considered upgrades.”

Restomods and performance development

The Jaguar XJ platform lends itself particularly well to sympathetic development.

We offer a range of restomod and upgrade programmes designed to enhance performance, usability and long-distance comfort while retaining the character of the original car. This can include tuned six-cylinder engines, developed V12 units, improved cooling and braking systems, and carefully considered driveline upgrades.

Whether subtle or more comprehensive, each build is approached with restraint – ensuring the finished car feels like a natural evolution rather than a departure from what made it special.

A workshop designed for quality care

All work is carried out at our dedicated facility, with in-house engine building, machining capability and restoration bays. This allows us to maintain full control over quality across every stage of a project.

Many of the cars we look after remain with us for years, with ongoing servicing, development and refinement as part of long-term ownership.

Talk to a Jaguar XJ specialist

Whether you are maintaining a well-used XJ, planning a restoration or exploring a restomod project, we are always happy to discuss your requirements.

Our Services

Engine Rebuilds

Our in-house engine shop is equipped to take care of all tasks from light machining to full recommissioning. We specialise in Jaguar, Aston Martin and Lotus but our expertise extends to other classic British marques.
Carburation & Fuelling

We can make sure your Weber, SU, Stromberg or Dellorto carburettors are running properly – and look the part too, right up to concours preparation. We also offer conversions to manual choke or aftermarket fuel injection.
Gearbox & Drivetrain

We’re experienced in servicing and full rebuilds, plus conversion – either from manual to automatic or to more modern options to help with reliability or distance driving. Moss and Borg Warner gearboxes are a speciality.
Brakes & Suspension

An area of particular importance given the relaxation of MoT rules for classic cars, we are able not only to fix an issues that arise but also to carry out regular checks and inspections to ensure your vehicle is as safe as possible.
Electrics & Wiring

From chasing gremlins to full loom replacements – plus upgrades to make use discreet use of modern accessories – our team understands even the most complex or problematic systems found on older British cars.here
Servicing & Tuning

We respect that many of our customers like to roll up their sleeves, so we can offer maintenance ranging from seasonal checks in lieu of MoT for exempt cars through to major servicing and overhaul. We also offer tuning.
Restomods & Conversions

Want something different? We have carried out transformational rebuilds on Jaguar E-Type, Mk2, XJS and XJ and Daimler equivalents. We can source donor cars or work with your own vehicle. Call us to discuss your plans.
Restoration & Race Preparation

Copthorne Classics takes on larger restoration projects, including welding, bodywork preparation and finishing. We also undertake race and rally support – at home and at events. Contact us for details.