Remember the LFT-666, the Jaguar F-Type Coupé-based sportscar Lister Motor Company unveiled in 2018? Now the British firm has revealed its "most powerful open-top supercar ever”, handing the F-Type R AWD Convertible a louder exhaust note, carbon-fibre kit and (of course) extra power.

Dubbed the LFT-C, the car (seen here sporting the Cambridge-based tuner’s bespoke livery) has received engine modifications such as uprated supercharger pulleys, custom intercoolers, performance air filters and Lister’s engine management unit.

The standard 5,0-litre supercharged V8, which is good for 405 kW and 680 N.m in stock form, now produces a whopping 497 kW and 976 N.m of torque. Lister claims the LFT-C will reach 100 km/h from standstill in “just over” 3,0 seconds, before topping out at 335 km/h.

Other mechanical upgrades include a revised suspension set-up and brakes plus, for added drama, a louder exhaust system.

The exterior features an array of “exclusive” carbon-fibre body panels, a newly designed grille (now donning the Lister badge) and an updated front bumper and rear diffuser. The lightweight alloys are wrapped in Michelin rubber, with extended wheelarches framing the rear items.

Lister says the LFT-C will be available with an “unlimited” option list. The cabin of the model shown here has been wrapped in what the company claims to be the United Kingdom’s finest Nappa leather. Hexagonal-shaped contrast stitching can be found on the door inserts and seats.

Like its LFT-666 stablemate, of which 99 units were produced, the convertible will be available in limited numbers. Only 10 examples of the LFT-C, each costing £139 000 (that's nearly R2,5-million), will be built, making it even more exclusive than the coupé...