Parkers overall rating: 4.5 out of 5 4.5

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

Reliable fuel consumption data for comparison purposes is not available for this model.

Fuel economy

A more stringent standard for fuel economy (WLTP) was introduced from September 2017, and this model was not required to undergo that test. Its fuel economy measured under the previous test system was 18 - 18 mpg. However these figures are less likely to be achievable in real world driving and so should never be compared to another car's mpg which was measured under the newer, more realistic WLTP system.

You don't splash out on a £300,000 convertible and then fret over whether you can afford the insurance. But for what it's worth, the Rolls falls into group 20, the highest available and the 377g/km of CO2 makes it an expensive company car. There are some upsides: fuel consumption is only bad rather than terrifying, a gallon stretching 18 miles which isn't much worse than you'd manage in a BMW M3, and the Rolls only needs servicing every 25,000 miles.

But you could probably run a supermini for a year on what it will costs to buy four new tyres for those 21-inch wheels.

With a theoretical average of 18mpg and carbon dioxide emissions of 377g/km, the Drophead Coupe isn't going to win any prizes for its green credentials. Owners can reassure themselves that the Rolls-Royce factory in Goodwood has signed up to a number of 'green' initiatives, even if their car is a high-emission vehicle. Having said that, 377g/km from a 6.7 litre V12 engine in a car weighing more than 2600kg is a good achievement.

It might well be badged a Rolls, but the engineering know-how and componentry is all BMW’s work so you would expect not to be left stranded at the side of the road. The Rolls is built at a sophisticated underground factory in Sussex where rigorous quality control checks are in place.

Ongoing running costs

Road tax (12 months) £580
See tax rates for all versions
Insurance group Not available
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