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 23 - 35 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.

A high performance car with more than 300bhp is never going to be cheap to run and the S5 is no exception. The V8 coupe model averages just 23mpg and although the Cabriolet is better with 30mpg, it’s far from economical. Audi servicing isn’t particularly cheap, but it’s on par with other premium manufacturers, while insurance is group 19.

With V8 or 3.0-litre supercharged V6 engines, it’s little surprise that the S5 isn’t very enviro-friendly. The coupe emits 288g/km of CO2 – although opting for the automatic tiptronic gearbox sees this lower to 256g/km. The S tronic only 3.0 TFSI convertible emits 224g/km of CO2 and is capable of 30mpg

This may be a high performance car, but Audi has a superb reputation for reliability and the S5 has proved no exception.

Ongoing running costs

Road tax (12 months) £290 - £630
See tax rates for all versions
Insurance group 40 - 42
How much is it to insure?