MINI Convertible - MPG, running costs & CO2

The most fuel-efficient MINI Convertible is the 1.5-litre Cooper. MINI claims it can achieve up to 47.9mpg, with CO2 emissions of 134-139g/km. Company-car users will be liable for a Benefit-in-Kind (BiK) tax rate of around 30%. The automatic gearbox doesn’t affect fuel economy or emissions, but it does cost around £1,500 extra.

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The more powerful 2.0-litre petrol engine in the MINI Cooper S claims fuel economy of 43.5mpg with CO2 emissions of 148-153g/km, putting it in a higher BiK band. The automatic model is actually a little more fuel efficient, with figures of 45.6mpg and 141g/km.

Even jumping up to the fastest John Cooper Works Convertible won’t see your running costs increase dramatically, as it manages up to 40mpg and CO2 emissions from 161g/km. The fuel efficiency figure seems achievable, too; our test car averaged around 38mpg after a couple of hours of mixed driving. Consumables like brakes and tyres may well be more expensive on this model, however.

All MINI convertibles are liable for the standard yearly rate of road tax.

Insurance groups

Despite more safety tech now being available, the MINI Convertible will be slightly more expensive to insure than before. All Cooper models sit in group 21 out of 50, rising to 26-28 for the Cooper S and 29 for the range-topping JCW.

Warranty

The standard MINI warranty isn’t the longest, lasting just three years, but it does at least cover you for unlimited mileage during that period. None of the MINI’s main rivals, including the Mazda MX-5 and BMW 2 Series coupe, offer a longer period of cover.

Servicing

MINI’s TLC servicing pack is very popular, covering servicing for three years or 36,000 miles for £299.