Which used BMW 6 Series sports should I buy?
The sole diesel, the 640d, is a turbocharged 3.0-litre straight six that cranks out 308bhp. It has plenty of low-end shove to make for relaxed cruising and enough power to feel genuinely quick. Refined manners and reasonable running costs make it the sensible choice.
The 640i turbocharged petrol straight six has a little more power than the 640d but needs revving harder to get the best out of it, while with two turbochargers bolstering a 4.4-litre V8, the 650i is significantly faster than the 640 models but much more expensive to buy and run.
As the performance figurehead of the range, the M6 gets a more powerful 4.4-litre V8 with 552bhp, or 592bhp if specified with the Competition Package.
Trim levels kick off with SE, which has 18in wheels, dual-zone climate control, cruise control, leather seats, heated front seats, front and rear parking sensors and a 10.2in infotainment system with sat-nav and a DAB radio. Seeing as it has all the stuff you actually need already, it’s our pick.
Sport adds 19in wheels, comfort front seats with lumbar support, nicer leather and dark chrome highlights.
At the top of the regular range is the M Sport (available on all but the M6), which gets sportier styling inside and out but no extra kit.
Our favourite BMW 6 Series Convertible: 640d SE