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.