The largest cost to a 607 owner from new will be depreciation. Even with a discount, expect the car to lose two-thirds of its cost in three years. Buying used is better as depreciation slows. The V6 petrol is probably not as thirsty as you might expect, while all the diesels should be able to return more than 40mpg on motorway runs. Insurance groups are relatively high at group 18 on the V6 and a best case scenario of 15 on the early 110bhp 2.0 HDi model.

607 is not particularly environmentally friendly. With an average of 196 g/km CO2 across the model line-up, its emissions are fairly standard for an executive 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.

The range is not particularly economical, averaging 37 mpg.

Most 607s should be mechanically sound, but our owners reviews reveal some drivers have experienced electrical problems. Other have driven tens of thousands of miles in 607s without any trouble.