There are but two trim levels: SE and M Sport. Entry-level cars get all of the expected luxuries, including 18in alloy wheels, dual-zone climate control, cruise control and, of course, leather upholstery as standard. M Sport simply adds a sportier bodykit that enhances the car’s sleek lines.
You can buy a 6 Series Gran Coupé for a mere £12,000, but it will have a high mileage; an average-miler will set you back around £15,000. Between £16,000 and £20,000 will find plenty of good 2015 and 2016 cars, while £20,000-£30,000 will get you into the driver’s seat of a 2017 or 2018 car. Pay around £25,000 and upwards for the 2019 endlings.
Need to know
The 640d SE with 18in wheels scored 49.6mpg on the old NEDC test and the 640i only 36.2mpg. Don’t expect much more than 20mpg out of any V8 model. Road tax will be suitably pricey, too.
Servicing is costly, especially at main dealers. BMW offers packs that allow you to budget for future servicing and pay by direct debit. Older cars can be looked after by independents, likely for less cash.
The 6 Series has proved reliable, but welds on the air-con condenser can fail, causing the gas to leak, so check it blows cold air. Electrical faults are common and can result in big bills, so avoid any car with a warning light or message showing.
640d SE: Despite the smoothness of the six-cylinder petrol engine in the 640i, we’d still choose the diesel for its blend of performance and fuel economy. SE trim gives you the same kit as M Sport but minus the sportier styling, so we would stick with that.
M6: Goes like stink and looks the business. If you have enough wherewithal for the higher running costs, this autobahn missile is a humdinger, producing 591bhp if the Competition pack is fitted.
Ones we found
2013 640d SE, 76,000 miles, £12,995
2015 640i SE, 33,000 miles, £19,950
2017 M6, 35,000 miles, £37,950
2018 650i M Sport, 29,000 miles, £28,950