Parkers overall rating: 2.5 out of 5 2.5

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 - 51 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.

Servicing is not cheap. Engines can be tricky to work on, so not one for the DIYer. Fuel economy is so-so because of the big body.

406 scores well on the eco front. With an average of 176 g/km CO2 across the line-up, its emissions are quite low for a medium-sized saloon. 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.

Eco-conscious buyers should consider the 2.0-litre diesel, which is one of the greenest models in the range. The range is also fairly economical, averaging 41 mpg.

An enviable reliability record so far - most have been maintained properly by fleet managers. The long-term outlook is looking good but time and mounting mileages will tell.

Ongoing running costs

Road tax (12 months) £165 - £330
See tax rates for all versions
Insurance group 19 - 32
How much is it to insure?