thornley kelham hand-shapes porsche 356 body in aluminum over 2,000 hours
thornley kelham begins its porsche 356 european SL with a familiar silhouette, then draws out the lightness of porsche’s early racing cars.
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a 1951 le mans idea returns in aluminum
Thornley Kelham begins its Porsche 356 European SL with a familiar silhouette, then draws out the speed and lightness of Porsche’s earliest racing cars. The Cotswolds workshop restores the original 356 chassis and wraps it in a broader, lower body formed by hand in aluminum. Stretched surfaces and tight panel gaps sharpen the car‘s teardrop profile while preserving the rounded character of the original.
At 930 kilograms, the coupe’s low mass shapes its proportions and performance. It sits close to the road with a wider stance, giving the compact body a firmer presence from every angle.
The design refers to Porsche’s Type 514, the all-aluminum 356 SL developed for the 1951 24 Hours of Le Mans. Four examples were built with streamlined bodies and partially enclosed wheels, and one won its class during Porsche’s first international motorsport appearance. Seventy-five years later, Thornley Kelham translates the race car’s aerodynamic simplicity into a road-going commission that remains unmistakably a 356.
coachbuilding shaped by digital tools
For the team at Thornley Kelham, each aluminum body takes more than 2,000 hours to form and finish. The panels are shaped by hand, then assembled on a precision jig so the door openings and body seams meet with contemporary accuracy.
CAD and CNC processes support the underlying geometry, while traditional metalwork gives the exterior its long curves and softly pinched edges. Seam welding adds rigidity through the restored structure. The outer joints are smoothed into a continuous skin, which allows the sunlight to slip across the hood and rear fenders with few interruptions.
The exchange between digital control and manual shaping gives the project much of its visual tension. The surfaces appear simple, though simplicity here demands an immense amount of labor. Simon Thornley describes the car through ‘handcrafted panels’ and a ‘stripped-down, minimalist interior,’ two elements that keep attention on material and proportion.
a flat-four rebuilt around lightness
Beneath the aluminum shell sits a bespoke 2.33L air-cooled flat-four based on the original 356 engine. The Touring version produces 180 hp. Sport specification raises output to 200 hp, with 180 lb-ft of torque. At 930 kilograms, the stronger setup passes 200 hp per ton. A five-speed dogleg manual replaces the period four-speed transmission and sends power to the rear wheels.
The chassis receives a wider engineering revision. Thornley Kelham strengthens and seam welds the original structure, then fits rack-and-pinion steering and rear suspension geometry influenced by early 911s. Ventilated disc brakes sit at both axles, with carbon-ceramic units available for clients hoping for a more aggressive setup. Buyers can choose passive or active dampers, and power assistance can be added to the steering.
a stripped cabin made for each owner
Inside, the cabin follows the same lean direction as the body. The dashboard stays low and spare, with circular instruments set into a slim horizontal panel. Bespoke seats and leather trim bring a warmer surface to the compact space, while fitted luggage can be developed around each commission.
Modern electronics are available according to the owner’s preference, though the layout keeps switches and screens from dominating the view. The cabin frames the windshield and painted metal around it, preserving the close relationship between driver and road that defines an early 356.
Thornley Kelham plans to build fifty coupe examples, each developed with its owner at the company’s Gloucestershire workshop. Program director Pim van de Riet, himself a longtime 356 owner, says he wanted to create ‘a car that Porsche themselves might have done’ with access to current engineering.
