Parkers overall rating: 3.5 out of 5 3.5

Miles per pound (mpp) Miles per pound (mpp)

Petrol engines 9.3 - 10.2 mpp
Low figures relate to the least economical version; high to the most economical. Based on WLTP combined fuel economy for versions of this car made since September 2017 only, and typical current fuel or electricity costs.

Fuel economy

Petrol engines 43.5 - 47.9 mpg

With two small petrol engines and two gearboxes to choose from, the Smart Fortwo Cabriolet’s running costs are low regardless of configuration. Fuel economy is a claimed 65.7mpg for all models except the high-powered automatic, which returns 67.3mpg instead. You’re unlikely to see these numbers in real life, of course, but an easy 50mpg is fair to expect.

The big difference between models here is the insurance groupings, with the low-power engines sitting in group 5E for both gearbox options and the high-output engine sitting in 10E

Despite the quartet of powertrains on offer, CO2 emissions for the Smart Fortwo Cabriolet are either 97g/km (for the high-powered automatic) or 99g/km for all other versions. There are better-performing small cars, but no version is particularly polluting.

The Smart Fortwo Cabriolet shouldn’t prove an issue where reliability is concerned. The engines and gearboxes have seen action in other products without issue, and all of the companies involved in the project (Smart, Mercedes-Benz and Renault) have made huge improvements in this respect over recent years.

According to the VOSA recall site there haven’t been any major recalls for the Fortwo at all.

Ongoing running costs

Road tax (12 months) £0 - £150
See tax rates for all versions
Insurance group 5 - 14
How much is it to insure?