Parkers overall rating: 4 out of 5 4.0

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 26 - 52 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.

The logical choice is the 640d which returns an average of 51.4mpg. Remember this car can complete the benchmark sprint in 5.5 seconds. BMW dealers can be expensive but you will get a first-class service to counter the outlay.

At 145g/km of CO2, the 640d is actually a reasonably clean car. This has been helped by the introduction of Efficient Dynamics technologies in the Coupe range and the all-new ECO PRO fuel saving mode. You can choose the ECO PRO by flicking the Drive Dynamic Control knob. Enabling ECO PRO tweaks the engine management system, accelerator mapping and gearshift characteristics in favour of a relaxed and low-revving driving style.

This reduces emissions and improves fuel economy.

BMW build quality is decent. The 6-Series has a good reputation for reliability but the previous generation had a few recalls. In 2004 it was recalled after reports of a loss of engine power. In 2006 there were two recall: loss of pressure in the rear tyres and the possibility of a rear shock absorber mounting failing. While in 2008 it was recalled for a rear axle carrier.

Ongoing running costs

Road tax (12 months) £170 - £585
See tax rates for all versions
Insurance group 49 - 50
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