The coupe has been discontinued for this year. The optional M Sport package offers carbon-fiber trim that was previously only available in the M6. Sonic Speed Blue metallic paint and two-tone 20-inch M wheels also join the options list. See the 2018 BMW 6 Series models for sale near you
Which 640i is the Best?
For long trips and short runs alike, the multicontour seats are absolutely worth the money. And selecting those extra safety features is always advisable. But you may want to wait and see what the 8 Series has to offer.
The 2018 BMW 6 Series is offered as a soft-top convertible in 640i and 650i forms.
The 640i ($87,695) comes standard with a turbocharged inline 6-cylinder engine, 18-in alloy wheels, adaptive LED headlights, LED fog lights, a sport-tuned suspension with adaptive dampers, dynamic cruise control with a braking function, rain-sensing wipers, a sport exhaust, front and rear parking sensors, a rearview camera, a self-dimming rearview mirror, keyless entry/start, a digital instrument cluster, leather upholstery with sun-reflective technology (including the steering wheel), 10-way power-adjustable/heated front seats with driver's-side memory settings, a power-adjustable steering wheel, dual-zone automatic climate control, iPod/USB and Bluetooth connectivity, a 9-speaker audio system with the hard-drive-based iDrive infotainment system and a 10.2-in widescreen display, a touchpad-equipped controller knob, digital music storage, navigation, HD Radio, satellite radio, wireless smartphone charging and Wi-Fi.
The 650i ($99,295) adds a twin-turbocharged V8, 19-in alloy wheels, a 600-watt 12-speaker Harman Kardon Surround Sound system, 16-way multicontour power-adjustable front seats (adding passenger-side memory settings) and Nappa leather upholstery.
Some of the 650i's features are available on the 640i as options. Other extras include 20-in wheels, side- and top-view cameras and a 16-speaker Bang & Olufsen audio system. A comprehensive M Sport Edition package contributes aerodynamic tweaks, M-design 20-in wheels, extensive M interior modifications (including Alcantara/Nappa leather trim and carbon-fiber trim), soft-close doors and ventilated front seats. All-wheel drive is $3,000 extra.
The back seat isn't really big enough for passengers unless those sitting in front don't mind having their chins close to their knees, or have short legs. Even then, headroom is severely limited unless the top is down.
Speaking of which, there are no complaints about the vinyl roof's rapid power operation. It's important to note, however, that soft tops are vulnerable to break-ins and harsh weather in ways that retractable hard tops are not. Incidentally, the heated glass rear window can retract when the roof is up and stay in place as a wind deflector when the roof is down. It takes about 19 seconds for the motors to open the roof (at speeds of up to 25 mph) and around 24 seconds to reverse the process.
The 6 Series has 12 cu ft. of trunk space with the top up. Folding the top down reduces that space by a couple of cubic feet.
City MPG / Hwy MPG
6 Series 640i Convertible
$86700 / $81130
6 Cylinder Turbo
20 / 29
8-Speed Shiftable Automatic
Is the 2018 BMW 640i a Safe Car?
The 6 Series comes with stability control, 4-wheel antilock disc brakes, active front head restraints, four airbags (front and front-side) and roll bars that pop up automatically in emergencies. Numerous high-tech safety features are available, including a blind spot monitoring system, lane-departure warning, night vision and a collision-mitigation system with automatic emergency braking.
The BMW 6 Series has not been crash-tested by the National Highway Traffic Safety Administration (NHTSA) or the independent Insurance Institute for Highway Safety (IIHS).
2018 BMW 640i vs the competition
2018 Jaguar F-Type -- Only two seats, but exceptionally capable, smooth, stylish and -- with the right engine -- seriously fast.
2018 Mercedes-Benz SL-Class -- One of the jewels in Mercedes-Benz's crown. The best of both worlds as well, since it has a retractable hard top.