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 37.7mpg and 170g/km.

Many Audi A5s will be run as company cars; but Benefit-in-Kind will be fairly expensive given its CO2 emissions, while the 45 TFSI is in the highest 37 per cent bracket.

Insurance groups

The Audi A5 starts at group 27 for the entry-level 35 TFSI in Sport trim. The range rises to group 43 for a 40 TDI quattro in Vorsprung trim, while the 444bhp RS5 sits in group 44.

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By comparison, the BMW 4 Series ranges from group 30 for the 420i to group 40 for the M440i with 369bhp. The Mercedes C-Class Coupe range spans from group 35 to 50.

Depreciation

Our experts predict that the A5 will hold onto around an average of 40-45 per cent per cent of its value come trade-in time, after three years and 36,000 miles. S5 aside, lower-powered petrol examples hold their value best, while the higher-powered petrol options in expensive Black Edition trim are best avoided if residual values are a concern - these top-spec models are predicted to retain just 40 per cent over the same three-year period of ownership.