Audi A4 Cabriolet (2006-2009) running costs and reliability

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Running costs rating: 3.5 out of 53.5

Written by David Ross Published: 6 June 2019

Miles per pound (mpp)

Reliable fuel consumption data for comparison purposes is not available for this model.

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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 20 - 44 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.

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Our figures show that the previous A4 Convertible held its value well and usually better than the equivalent BMW 3-Series models and Mercedes-Benz CLK. Fuel economy is acceptable from all engines (taking into account size and performance) and is particularly good in the two diesels. Service intervals are dictated by the on-board computer which means that the harder you drive it, the shorter they will be.

The A4 is quite a polluting model. With an average of 219g/km CO2 across the range, its emissions are a touch high for a sports cabriolet. However, it’s worth noting that the line up has a high number of diesel models, bringing the average down and giving buyers more choices of low-emission versions. Diesels typically produce less CO2 than petrol engines with similar power outputs.

The range is not very frugal either, averaging 33mpg.

Only the 1.8T has caused any major grumbles – but the problems it suffered a few years ago have now been fixed. The previous model was superbly built and this car appears to be the same.