Son's Automotive Group Compares 2017 BMW 6 SERIES VS 2017 Dodge Challenger Near Buford, GA

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2017 Dodge Challenger

Safety Comparison

The 6 Series’ pre-crash front seatbelts will tighten automatically in the event the vehicle detects an impending crash, improving protection against injury significantly. The Challenger doesn’t offer pre-crash pretensioners.

The 6 Series offers optional City Collision Mitigation, which use forward mounted sensors to warn the driver of a possible collision ahead. If the driver doesn’t react and the system determines a collision is imminent, it automatically applies the brakes at full-force in order to reduce the force of the crash or avoid it altogether. The Challenger offers an available collision warning system without the automated brake feature which would prevent or reduce the collision if the driver fails to react.

The 6 Series offers all-wheel drive to maximize traction under poor conditions, especially in ice and snow. The Challenger doesn’t offer all-wheel drive.

A passive infrared night vision system optional on the 6 Series helps the driver to more easily detect people, animals or other objects in front of the vehicle at night. Using an infrared camera to detect heat, the system then displays the image on a monitor in the dashboard. The Challenger doesn’t offer a night vision system.

The 6 Series’ optional lane departure warning system alerts a temporarily inattentive driver when the vehicle begins to leave its lane. The Challenger doesn’t offer a lane departure warning system.

The 6 Series offers an optional Surround View to allow the driver to see objects all around the vehicle on a screen. The Challenger only offers a rear monitor and rear parking sensors that beep or flash a light. That doesn’t help with obstacles to the front or sides.

Both the 6 Series and the Challenger have standard driver and passenger frontal airbags, front side-impact airbags, driver knee airbags, side-impact head airbags, front seatbelt pretensioners, plastic fuel tanks, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, daytime running lights and available blind spot warning systems.

Warranty Comparison

The 6 Series comes with a full 4 year/50,000 mile basic warranty, which covers the entire car and includes 24 hour roadside assistance. The Challenger’s 3 year/36,000 mile basic warranty expires 1 year and 14,000 miles sooner.

The 6 Series’ corrosion warranty is 7 years and unlimited miles longer than the Challenger’s (12/unlimited vs. 5/100,000).

BMW pays for scheduled maintenance on the 6 Series for 3 years and 36,000 miles. BMW will pay for oil changes, lubrication and any other required maintenance. Dodge doesn’t pay scheduled maintenance for the Challenger.

Reliability Comparison

For smoother operation, better efficiency and fewer moving parts, the engines in the 6 Series have an overhead cam design, rather than the old pushrod design of some of the engines in the Challenger.

To reliably power the ignition and other systems and to recharge the battery, the 6 Series has a 210-amp alternator. The Challenger’s standard 160-amp alternator isn’t as powerful.

To reliably start during all conditions and help handle large electrical loads, the 6 Series has a standard 900-amp battery. The Challenger’s 625-amp battery isn’t as powerful.

J.D. Power and Associates’ 2016 Initial Quality Study of new car owners surveyed provide the statistics that show that BMW vehicles are better in initial quality than Dodge vehicles. J.D. Power ranks BMW fifth in initial quality, above the industry average. With 23 more problems per 100 vehicles, Dodge is ranked 21st, below the industry average.

J.D. Power and Associates’ 2016 survey of the owners of three-year-old vehicles provides the long-term dependability statistics that show that BMW vehicles are more reliable than Dodge vehicles. J.D. Power ranks BMW 14th in reliability, above the industry average. With 66 more problems per 100 vehicles, Dodge is ranked 32nd.

Engine Comparison

The 6 Series has more powerful engines than the Challenger:



640i 3.0 turbo 6 cyl.

315 HP

330 lbs.-ft.

650i 4.4 turbo V8

445 HP

480 lbs.-ft.

M6 4.4 turbo V8

560 HP

500 lbs.-ft.

M6 Competition 4.4 turbo V8

591 HP

516 lbs.-ft.

Challenger 3.6 DOHC V6

305 HP

268 lbs.-ft.

Challenger R/T automatic 5.7 V8

372 HP

400 lbs.-ft.

Challenger R/T manual 5.7 V8

375 HP

410 lbs.-ft.

Challenger Scat Pack/SRT 392 HEMI 6.4 V8

485 HP

475 lbs.-ft.

As tested in Car and Driver the 640i is faster than the Dodge Challenger V6 (automatics tested):

6 Series


Zero to 60 MPH

4.9 sec

6.2 sec

Zero to 100 MPH

12.7 sec

15.5 sec

5 to 60 MPH Rolling Start

5.9 sec

6.5 sec

Quarter Mile

13.6 sec

14.7 sec

Speed in 1/4 Mile

103 MPH

97 MPH

Fuel Economy and Range Comparison

On the EPA test cycle the 6 Series Coupe gets better fuel mileage than the Challenger:

6 Series




15 city/22 hwy

13 city/21 hwy



21 city/30 hwy

16 city/25 hwy



17 city/24 hwy

15 city/25 hwy

392 Hemi/Auto



19 city/28 hwy


Regenerative brakes improve the 6 Series’ fuel efficiency by converting inertia back into energy instead of wasting it. The Challenger doesn’t offer a regenerative braking system.

In heavy traffic or at stoplights the 6 Series’ engine automatically turns off when the vehicle is stopped, saving fuel and reducing pollution. The engine is automatically restarted when the driver gets ready to move again. (Start/Stop isn’t accounted in present EPA fuel mileage tests.) The Challenger doesn’t offer an automatic engine start/stop system.

The 6 Series M6’s standard fuel tank has 2.6 gallons more fuel capacity than the Challenger (21.1 vs. 18.5 gallons).

Brakes and Stopping Comparison

For better stopping power the 6 Series’ brake rotors are larger than those on the Challenger:


M6 Carbon Brakes

Challenger SXT

Challenger 392 Hemi/Hellcat

Front Rotors

13.7 inches

16.1 inches

12.6 inches

15.4 inches

Rear Rotors

13.6 inches

15.6 inches

12.6 inches

13.8 inches

The 6 Series’ standard front and rear disc brakes are vented to help dissipate heat for shorter stops with less fading. The rear discs standard on the Challenger SXT are solid, not vented.

The 6 Series stops shorter than the Challenger:

6 Series


60 to 0 MPH

105 feet

109 feet

Motor Trend

Tires and Wheels Comparison

For better traction, the 6 Series has larger standard tires than the Challenger (245/45R18 vs. 235/55R18).

The 640i’s standard tires provide better handling because they have a lower 45 series profile (height to width ratio) that provides a stiffer sidewall than the Challenger SXT’s standard 55 series tires. The 6 Series’ optional 245/35R20 front and 275/30R20 rear tires have a lower 35 series front and 30 series rear profile than the Challenger SRT’s 40 series tires.

Changing a flat tire near traffic can be dangerous and inconvenient. The run-flat tires standard on the 6 Series can be driven up to 50 miles without any air pressure, allowing you to drive to a service station for a repair. The Challenger doesn’t offer run-flat tires.

Suspension and Handling Comparison

The 6 Series offers an available active suspension system, which counteracts cornering forces actively, limiting body roll and improving handling and stability. Dodge doesn’t offer an active suspension on the Challenger.

For better handling and stability, the average track (width between the wheels) on the 6 Series is 1 inch wider in the rear than the average track on the Challenger.

The M6 Coupe executes Motor Trend’s “Figure Eight” maneuver 1.1 seconds quicker than the Challenger Scat Pack (24.4 seconds @ .83 average G’s vs. 25.5 seconds @ .81 average G’s).

Chassis Comparison

The M6 is 4.9 inches shorter than the Challenger, making the 6 Series easier to handle, maneuver and park in tight spaces.

The design of the BMW 6 Series amounts to more than styling. The 6 Series offers aerodynamic coefficients of drag from .3 to .33 Cd (depending on bodystyle and options). That is lower than the Challenger (.337 to .383). A more efficient exterior helps the 6 Series go faster and keeps the interior quieter. It also helps the 6 Series get better fuel mileage.

For excellent aerodynamics, the 6 Series has standard flush composite headlights. The Challenger has recessed headlights that spoil its aerodynamic shape and create extra drag.

Passenger Space Comparison

The 6 Series Coupe has .7 inches more front headroom, .1 inches more front legroom and 1.8 inches more front shoulder room than the Challenger.

Cargo Capacity Comparison

With its coupe or convertible body style, valet key and remote trunk release lockout, the 6 Series offers cargo security. The Challenger’s non-lockable folding seat and non-lockable remote release defeat cargo security.

Ergonomics Comparison

When two different drivers share the 6 Series, the memory system makes it convenient for both. Each setting activates different, customized memories for the driver’s seat (memory seat optional for the front passenger), steering wheel position, outside mirror angle, climate settings and radio stations. The Challenger doesn’t offer a memory system.

The 6 Series’ standard easy entry system raises the steering wheel, making it easier for the driver to get in and out. The Challenger doesn’t offer an easy entry system.

The 6 Series offers an optional heads-up display which projects speed and other key instrumentation readouts in front of the driver’s line of sight, allowing drivers to view information without diverting their eyes from the road. The Challenger doesn’t offer a heads-up display.

The 6 Series’ front and rear power windows all open or close with one touch of the switches, making it more convenient at drive-up windows and toll booths, or when talking with someone outside of the car. The Challenger’s power windows’ switches have to be held the entire time to close them fully.

If the windows are left down on the 6 Series the driver can raise them all using the key in the outside lock cylinder. On a hot day the driver can lower the windows from outside the vehicle using the key in the outside lock cylinder or the keyless remote. The driver of the Challenger can only raise the windows from inside the vehicle, with the ignition on.

The 6 Series has a standard locking fuel door with a remote release located convenient to the driver. A locking fuel door helps prevent vandalism, such as sugar in the tank and fuel theft. The Challenger doesn’t offer a locking fuel door.

The 6 Series’ rain-sensitive wipers adjust their speed and turn on and off automatically based on the amount of rainfall on the windshield. This allows the driver to concentrate on driving without constantly adjusting the wipers. The Challenger’s standard intermittent wipers change speed with vehicle speed, but can’t turn on and off or change speed based on changing rainfall.

Heated windshield washer nozzles are standard on the 6 Series to prevent washer fluid and nozzles from freezing and help continue to keep the windshield clear in sub-freezing temperatures. The Challenger doesn’t offer heated windshield washer nozzles.

In poor weather, headlights can lose their effectiveness as grime builds up on their lenses. This can reduce visibility without the driver realizing. The 6 Series has standard headlight washers to keep headlight output high. The Challenger doesn’t offer headlight washers.

To help drivers avoid possible obstacles, the 6 Series has standard cornering lights to illuminate around corners when the turn signals are activated. The Challenger doesn’t offer cornering lights. The 6 Series also has standard adaptive headlights to illuminate around corners automatically by reading vehicle speed and steering wheel angle.

A power rear sunshade is optional in the 6 Series Coupe to help block heat and glare for the rear passengers. The Challenger doesn’t offer a rear sunshade.

When the 6 Series is put in reverse, the passenger rearview mirror tilts from its original position. This gives the driver a better view of the curb during parallel parking maneuvers. Shifting out of reverse puts the mirror into its original position. The Challenger’s mirror doesn’t automatically adjust for backing.

The 6 Series has standard automatic dimming rear and side view mirrors which automatically darken quickly when headlights shine on them, keeping following vehicles from blinding or distracting the driver. The Challenger has an automatic rear view mirror, but its side mirrors don’t dim.

The 6 Series (except xDrive)’s optional Parking Assistant can parallel park or back into a parking spot by itself, with the driver only controlling speed with the brake pedal. The Challenger doesn’t offer an automated parking system.

Economic Advantages Comparison

According to The Car Book by Jack Gillis, the 6 Series is less expensive to operate than the Challenger because typical repairs cost much less on the 6 Series than the Challenger, including $221 less for an alternator.

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