Audi A5 Coupe review - MPG, CO2 and running costs

​The most efficient A5 is the 35 TDI diesel, which returns up to 58.9mpg and emits 125g/km of CO2, while the 40 TDI delivers 50.4mpg and from 147g/km. Audi claims the 40 TFSI petrol will manage 42.8mpg and 150g/km, while the 45 TFSI manages 36.7mpg and 166g/km.

A number of Audi A5s will be run as company cars; but Benefit-in-Kind will be fairly expensive given its CO2 emissions – the 45 TFSI sits in the highest 37 per cent bracket.

Insurance groups

The Audi A5’s insurance ratings start at group 27 (out of 50) for a 30 TDI in entry-level Sport trim, while the most expensive standard model is the S-Line fitted with the 45 TFSI petrol engine – this particular version resides in group 40. Opting for the high-performance RS 5 pushes insurance up to group 44.

By comparison, the BMW 4 Series ranges from group 30 for the 420i to group 40 for the M440i with 369bhp.

Depreciation

Our experts predict that the A5 will hold onto around an average of 46-52 per cent per cent of its value come trade-in time, after three years and 36,000 miles. Petrol-powered Sport and S-Line models find themselves at the higher end of the scale, while the optional Technology Pack helps to boost residual values a bit further.