Overview & Reviews

BMW has long offered fine driving cars for every luxury budget, but four-door models have generally been the company's bread and butter. The BMW 6 Series coupe and convertible are for those seeking two-door style in a high-end package that's a bit more extravagant than the norm. The current 6 Series follows in its predecessor's footsteps as a complement to BMW's 5 Series and 7 Series sedans, offering a similar range of six- and eight-cylinder power but adding a unique sense of exclusivity and style.

New or used, the 6 Series siblings rank among the more interesting luxury two-doors on the market. They have their faults, to be sure, and they also face stiff competition from several prestigious competitors. On the other hand, their technology is cutting-edge and their powertrains are superb. It's hard to go wrong with any 6 Series model that fits your budget.

Current BMW 6 Series
The current BMW 6 Series is offered as a coupe and a convertible. The convertible is notable for its clever soft-top roof design with a separately controlled rear window. You can lower that window with the roof up for added ventilation, or raise it as a wind deflector with the roof down.

The base 640i is powered by a turbocharged 3.0-liter inline-6 with 315 horsepower and 332 pound-feet of torque. The 650i steps up to a turbocharged 4.4-liter V8 that cranks out a formidable 445 hp and 480 lb-ft of torque. Rear-wheel drive and an eight-speed automatic transmission are standard on all models, with "xDrive" all-wheel drive optional. And yes, that includes the convertibles -- so if you want a 445-hp drop top with AWD and a fabric roof, BMW will be more than happy to build you one.

Standard features on the 640i include adaptive xenon headlights, adaptive suspension dampers, six-way power heated front seats with lumbar adjustments, leather upholstery, dual-zone automatic climate control and the iDrive electronics interface with a 10.2-inch display and navigation. The 650i adds larger wheels, an upgraded audio system and 16-way power front seats. In typical BMW fashion, the options list is generous and pricey, highlighted by side- and surround-view cameras, self-closing automatic doors, a leather-covered dashboard, adaptive cruise control, a night-vision camera and ceramic-trimmed knobs.

Despite its substantial size, the 6 Series is best for two passengers. The rear compartment is strictly for short trips unless you put a small child back there. However, those up front will be treated to first-class accommodations with very comfortable seats, top-notch materials and high-tech gizmos aplenty. Furthermore, the trunk is rather generous for a luxury sport coupe at 12.3 cubic feet. Even the convertible's trunk measures a decently sized 10.6 cubic feet with the top lowered. Retractable-hardtop convertibles typically hold much less than that with their roofs stowed away.

From behind the wheel, no one will mistake the 6 Series for a 4 Series. This burly grand tourer has few sporting pretensions, though it's far from clumsy and the steering is precise enough to make BMW's biggest two-door feel reasonably spry. Highway runs are where the 6 Series really excels, racking up hundreds of well-insulated, fatigue-free miles at a stretch with effortless passing power -- particularly from the otherworldly V8.

Used BMW 6 Series Models
The current, third-generation 6 Series debuted for 2012 with larger dimensions and more conservative styling than its rather avant-garde predecessor, as well as turbocharged power in place of that model's naturally aspirated engines. It's also the first 6 Series to offer all-wheel drive. The first-year 650i was marginally less powerful (400 hp and 450 lb-ft) and had a manual transmission option, while the 640i models weren't eligible for all-wheel drive until 2014. Changes have otherwise been minimal.

The previous, second-generation BMW 6 Series was produced from 2004-'10 in coupe and convertible body styles. Originally, this 6 Series came equipped with a 4.4-liter V8 rated at 325 hp and 330 lb-ft of torque and was known as the 645Ci. For 2006, the name changed to 650i (minus the "C") and its engine was updated to a 4.8-liter V8 that produced 360 hp and 360 lb-ft of torque. The 645Ci and 650i drive quite similarly -- the smaller V8 shares the 4.8-liter's athletic character but has a slightly less vigorous power delivery. If you find a well-kept 645Ci on the used market, you won't find it lacking from a performance standpoint.

Prior to 2008, the second-generation 6 Series offered three six-speed transmissions: a traditional manual, a traditional automatic and BMW's SMG, which used an electronically controlled clutch to provide both the responsiveness of a manual and the forget-about-it friendliness of an automatic. The SMG may sound tempting, but we'd steer clear, as its herky-jerky performance can make everyday driving a literal pain in the neck. Most 6 Series from this era were equipped with the traditional automatic, but it didn't become standard until 2010. The manual became an option at that point.

Shoppers should note that beyond the powertrain changes, in-car electronics were also upgraded over the years. Early models feature older versions of BMW's iDrive system, which was still in its nascent stages and quite frustrating to use. Gradual improvements were made, but it wasn't until 2010 that the system became fully worthwhile.

In reviews of the second-generation BMW 6 Series, we found that the ride was supple and quiet, the brakes were powerful, and despite nearly 2 tons of weight, handling limits remained high thanks to sophisticated tuning and a well-balanced chassis. Adding the Sport package firmed up the ride and increased cornering grip via a set of 19-inch wheels and tires, while the variable-ratio active steering quickened low-speed turning response.

As with any luxury touring coupe or convertible, the specific mission of this BMW 6 Series was to cover lots of road in a hurry while making its occupants look and feel great -- the front ones, anyway. Unfortunately, the 6 Series offered little of the rear seat space found in its contemporary 5 Series sedan counterpart despite similar midsize dimensions. Also, neither the 650i coupe nor the convertible were considered fashion leaders at the time, though their relative rarity today may make their unconventional lines more appealing.

Not counting the BMW 8 Series of 1990s vintage, the precursor to the modern 6 Series models is the first-generation 6 Series coupe produced from 1977-'89. All models used an inline six-cylinder engine ranging from 3.2 to 3.5 liters, tuned to varying degrees of power. Even the most potent version could only accelerate to 60 mph in the low 6-second range and grip the road in the upper 0.70g range -- modest by modern standards -- while the car's semi-trailing arm rear suspension never did the best job of keeping the car planted to the road. Still, it was an engaging car to drive in its day, and for that reason the original BMW 6 Series coupe retains an important place in BMW history.

User Reviews:

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  BMW 645 - Dream! - 2004 BMW 6-Series
  By Orbit - August 10 - 2:00 am

  I have it this vehicle for about 45 days and have been extremely please with every feature. I was hesitant at first due to my experience with BMW service departments in the past, but the car out weighs those concerns. The car is fantastic - a car you can drive everyday!!! The lines and looks are fanstastic - top down is the only way to drive this. Many trips have already been done to Park City and Deer Valley.

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  SOOOOO Sweeet - 2004 BMW 6-Series
  By Joe in Charleston - August 7 - 2:00 am

  Words can not justify the feel and look of this automobile. If I were able to express my feelings in words I would be working for CAR and DRIVER instead of writing this. The car is just Awesome, the ride the feel and the pure stick to the3 road handling that BMW is known for. For total luxury in an automobile I would vote Mercedes, but when you combine Luxury, styling and just pure adrenaline nothing touches what BMW has done with the 645 CiC. Gotta go know, 81 degrees no humidity and the sun going down outside......I think I hear the roar of the V8 calling my name, Ya just gotta luv it!!!!!

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  The Best of the Best - 2004 BMW 6-Series
  By Doc Bee - July 31 - 2:00 am

  Just great to drive and be seen in.... Fast luxury and beauty!

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  awesome car - 2004 BMW 6-Series
  By lexrom - July 7 - 2:00 am

  I have been driving BMWs ( 3s 6s and 7s) for 20 years--- while nothing competes with the new 745I for sheer comfort and overall drive, the same can be said about the 645s looks, handling and performance in a sport coupe--the only complaint I have is the lack of little amenities such as a coin holder or the placement of the extra outlet for your phone-otherwise it was worth the 15 year wait. Driving the car makes driving fun again-like it was when you first got your license. The car is simply awesome!!!!!!!!!

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  excellent all around luxury sport coupe - 2004 BMW 6-Series
  By kevinvoss - July 7 - 2:00 am

  got the covertible in silver grey with black interior, navigation is standard, added the sport and cold packages, went for the automatic with manual option this is a great transmission gets better mileage than the smg and so smooth and easy to use no jerky shifts, i like everything about this car, even the i-drive is making sense now that my kid showed me how to work it.

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  Whiplash - 2004 BMW 6-Series
  By mulligan - July 6 - 2:00 am

  Ive owned my launch vehicle for 4 months and it still turns heads so fast, guys get whiplash.

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  I fell in love... - 2004 BMW 6-Series
  By dantec - July 6 - 2:00 am

  This car definatively gets its place in one of the most extrodinary cars driving the earth... The combination of the interior, exterior and BMW power is amazing. This longtime BMW enthusiast is happy that BMW has found a new design direction to innovate... This car drives like a charm, the 4.4 V8 is amazing..! Smooth and continously giving you power... It is true that iDrive has a high learning curve, but once you master it - its truelly amazing. I just love the car and time put into this car. After driving it for a few months I can see the time, care and love put into this car.

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  A dream machine - 2004 BMW 6-Series
  By george henderson, jr - July 3 - 2:00 am

  This could be the neatest car Ive ever owned and that includes a Corvette, an XKE and 24 years of Mercedes S Class. This is a blast to drive and a show stopper. A sports car with room for four if you need it (a plus over an XK-8) and quicker than a cat. The design and air-flow keep you and passangers from being wind blown.

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  The 6 Series - 2004 BMW 6-Series
  By Andy25pitt25panthers - June 22 - 2:00 am

  This car is just off the wall it is a great and i mean great car. Its safe, fun to drive, everywhere i drive it heads are always turning and looking to see what kind of car that is. It is super fast! I love the interior its very slick and just echoes the word "PIMP".

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  best car i ever had - 2004 BMW 6-Series
  By bruce8499 - June 13 - 2:00 am

  all i can say its unreal