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James Flammang
Contributing Editor - May 18, 2016

Expert Rating

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20 City / 29 Highway

Unlike other websites and magazines, our ratings are not based solely on a singular road test, but rather a more encompassing batch of criteria: quality, safety, comfort, performance, fuel economy, reliability history and value. When comparing vehicles using our Rating System, it's important to note that the rating earned by each vehicle correlates only to the models within its class. For example, a compact car cannot be compared to a SUV—They are different vehicles altogether.

You can interpret our ratings in the following way:

5-Star: Outstanding vehicle. Only the most exceptional vehicles achieve this rating.

4-Star: Very Good vehicle. Very good and close to being the best vehicle in its class.

3-Star: Good vehicle. Decent, but not quite the best. Often affordable, but lacking key features found in vehicles of the same class.

2-Star: Below average vehicle. Not recommended, and lacking attributes a car buyer would come to expect for the price.

1-Star: Poor vehicle. Simply does not deserve to be on the road.


Packed with all the built-in prestige of the BMW 6 Series, the 640 promises silken performance and supreme comfort, in an expressive coupe (or convertible) body. It's a natural choice for buyers who relish the full luxury sedan experience, but don’t really need—or want—four doors. Essentially a full-size model, the 6 Series is a large, relatively heavy car. Yet, enthusiastic engine response and fulfilling steering/handling make it seem like a smaller model. For even greater energy, BMW also offers the coupe and convertible with V8 power, as the 650.

What's New for 2017

Following a mild freshening last year, wireless charging and a wi-fi hotspot are now standard, along with the latest iDrive control (5.0). Smartphone integration is no longer offered, as its functions are part of the new wireless charging. The M Sport Edition remains available.

Choosing Your BMW 640

Available as a coupe or convertible, the 640 carries a turbocharged 3-liter six-cylinder engine that develops 315 horsepower at 6000 rpm and 330 pound-feet of torque at 4,500 rpm, mated to an eight-speed automatic transmission fitted with Launch Control. You also get a sport-tuned suspension, as well as selectable driving modes that tailor the 640's performance to your motoring preferences.

BMW's xDrive all-wheel-drive system is available on both body styles, as an alternative to rear-drive. Fuel economy is estimated at 20 mpg in city driving and 31 mpg on the highway with rear-drive. With xDrive, the highway estimate dips to 29 mpg.

Priced at $77,600, the 640 comes lavishly equipped from the start, including such features as hard drive-based navigation, a 9-speaker audio system, front and rear parking sensors, and power-folding heated mirrors. The leather upholstery used in the convertible is sun-reflective, and its top may be lowered in 20 seconds.

The available Executive Package elevates the luxury level of the 640 with automatic soft-closing doors, ventilated front seats, Harman Kardon surround-sound audio, multi-contour seats, and head-up display. For an even sportier feel, you can select the M Sport Package, which provides more aggressive styling inside and out, plus specific 19- or 20-inch wheels.

The Driver Assistance Plus Package adds a valuable collection of advanced safety technology, including lane-departure warning, blind-spot monitoring, frontal collision warning, city collision mitigation, pedestrian detection, side- and top-view cameras, and speed-limit information. The Cold Weather Package includes a heated steering wheel and a ski bag. A Black Accent Package offers a choice of interior trim materials.

To simplify equipment choices, BMW also offers the M Sport Edition package, which includes the contents of the Executive and M Sport packages.

Beyond the packages, you can add some sophisticated individual features, such as active roll stabilization, four-wheel steering, Night Vision with pedestrian detection, and a self-parking system.

CarsDirect Tip

Even in base form, the 640 is well-equipped and provides a gratifying drive experience, but extra-cost options may be hard to resist. Upgrading to the M Sport Edition, in particular, packages a number of desirable options at a discounted price ($4,800 for the coupe). We consider it the most cost-effective way to equip a 640 coupe or convertible.

Get your price on a BMW 640 »

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