It gets the same 2.0-litre four-cylinder turbo petrol engine as the MINI JCW hatchback, which gives it 228bhp and 320Nm of torque. That means it's about 20bhp up on the previous-gen JCW Convertible and 39bhp up on the MINI Cooper S Convertible.
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The MINI JCW convertible is 105kg heavier than the hatchback thanks to the extra strengthening required for a convertible car, which makes it about 0.3 seconds slower from 0-62mph: it will manage the sprint in 6.6 seconds with its six-speed manual gearbox, or 6.5 seconds with the optional 6-speed automatic and will go on to a top speed of 150mph.
The manual model manages 43.5mpg, and the automatic 47.9mpg, a significant improvement over the previous-gen JCW Convertible.
Styling additions include bigger cooling vents near the grille, sportier-looking sills, LED headlights and taillights, JCW badging and an optional Rebel Green paint that's only available on John Cooper Works models. The rest of the JCW hatch's styling upgrades are carried over too, including the large bonnet scoop, red detailing on the grille and striking lightweight alloy wheels.
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The soft-top roof can be opened at speeds up to about 19mph, and takes 18 seconds - plenty of time for onlookers to get a look at the optional Union Jack design.
Standard equipment includes air-conditioning, parking sensors, sports seats and stainless steel pedals. 17-inch wheels are standard, but you can also get 18-inch versions.
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