Values undercut equivalent models from BMW and Mercedes-Benz, and the A4 offers higher levels of standard equipment. All engines are frugal given their power outputs, although there is no answer to the clever fuel-saving Efficient Dynamics technology offered by BMW at the time. Audi A4 running costs are helped by strong resale values, particularly on diesel models, although servicing tends to be expensive although you can cut it down by using an independent specialist.

The four-cylinder engines in the Audi A4 offer significantly better fuel consumption and lower CO2 emissions than the versions used in the previous model. The Audi A4 emissions reduction meant the whole range had strong eco-credentials, particularly the 2.0 TDIe which emitted just 120g/km and will average an impressive 61mpg making it the most efficient in the range. Today that still equates to reasonably low tax rates.

The Audi A4 reliability record is average at best, but can be helped if the previous owner was meticulous with their servicing. Audi dealers do perform well when responding to problems or complaints.