This car has been superseded by a newer model, click here to go to the latest Porsche 911 Cabriolet review.

Parkers overall rating: 4.6 out of 5 4.6

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 28 - 37 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.

For a high performance car the Porsche 911 Cabriolet is surprisingly frugal. The most economical engine is the 350bhp 3.4-litre and it averages 33.6mpg when mated to the PDK gearbox. Servicing costs can be high but you will receive a high level of customer service.

Thanks to the lightweight body, new engines and stop/start technology the Porsche 911 is cleaner than ever before. The greenest version of the 911 is the 350bhp 3.4 litre model with CO2 emissions of 198g/km. While this might seem quite high - it falls in to Band J for road tax - for a car producing 350bhp it's actually quite reasonable and competitive compared to its rivals.

Reliability is one of the brand’s key attributes. The Porsche 911 Cabriolet feels brilliantly engineered while the interior plastics are soft to touch and the switchgear feels well built.

Ongoing running costs

Road tax (12 months) £240 - £565
See tax rates for all versions
Insurance group 49 - 50
How much is it to insure?