Son's Automotive Group Compares 2016 BMW 6 SERIES VS 2015 Porsche 911 Near Duluth, GA

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2016 BMW 6 SERIES

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2016 BMW 6 SERIES

VS
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2015 Porsche 911

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 911 doesn’t offer pre-crash pretensioners.

The 6 Series has standard Active Head Restraints, which use a specially designed headrest to protect the driver and front passenger from whiplash. During a rear-end collision, the Active Head Restraints system moves the headrests forward to prevent neck and spine injuries. The 911 doesn’t offer a whiplash protection system.

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 911 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 911 doesn’t offer a lane departure warning system.

The 6 Series offers an optional Side and Top View Cameras to allow the driver to see objects all around the vehicle on a screen. The 911 only offers a rear monitor and front and rear parking sensors that beep or flash a light. That doesn’t help with obstacles to the sides.

The 6 Series’ optional blind spot warning system uses digital cameras monitored by computer to alert the driver to moving objects in the vehicle’s blind spots where the side view mirrors don’t reveal them. The 911 doesn’t offer a system to reveal objects in the driver’s blind spots.

The 6 Series has standard BMW Assist, which uses a global positioning satellite (GPS) receiver and a cellular system to remotely unlock your doors if you lock your keys in, help track down your vehicle if it’s stolen or send emergency personnel to the scene if any airbags deploy. The 911 doesn’t offer a GPS response system, only a navigation computer with no live response for emergencies, so if you’re involved in an accident and you’re incapacitated help may not come as quickly.

Both the 6 Series and the 911 have standard driver and passenger frontal airbags, front side-impact airbags, driver and front passenger 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, available all wheel drive and crash mitigating brakes.

The BMW 6 Series weighs 463 to 1478 pounds more than the Porsche 911. The NHTSA advises that heavier cars are much safer in collisions than their significantly lighter counterparts.

Warranty Comparison

The 6 Series’ corrosion warranty is 2 years longer than the 911’s (12 vs. 10 years).

BMW pays for scheduled maintenance on the 6 Series for 4 years and 50,000 miles. BMW will pay for oil changes, lubrication and any other required maintenance. Porsche doesn’t pay scheduled maintenance for the 911.

There are over 74 percent more BMW dealers than there are Porsche dealers, which makes it much easier should you ever need service under the 6 Series’ warranty.

Reliability Comparison

To reliably power the ignition and other systems and to recharge the battery, the 6 Series has a standard 210-amp alternator. The 911’s 175-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 911’s 520-amp battery isn’t as powerful.

Engine Comparison

The 6 Series has more powerful engines than the 911:

Horsepower

Torque

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

552 HP

502 lbs.-ft.

M6 Competition Package 4.4 turbo V8

592 HP

500 lbs.-ft.

911 3.4 DOHC 6 cyl.

350 HP

287 lbs.-ft.

911 S 3.8 DOHC 6 cyl.

400 HP

325 lbs.-ft.

911 GTS 3.8 DOHC 6 cyl.

430 HP

325 lbs.-ft.

911 GT3 Coupe 3.8 DOHC 6 cyl.

475 HP

325 lbs.-ft.

911 Turbo 3.8 turbo 6 cyl.

520 HP

487 lbs.-ft.

As tested in Car and Driver the M6 is faster than the 911 S (automatics tested):

6 Series

911

Zero to 60 MPH

3.8 sec

4 sec

Zero to 100 MPH

8.6 sec

9.3 sec

5 to 60 MPH Rolling Start

4.2 sec

5 sec

Passing 30 to 50 MPH

2 sec

2.9 sec

Passing 50 to 70 MPH

2.5 sec

2.9 sec

Quarter Mile

12.2 sec

12.4 sec

Speed in 1/4 Mile

119 MPH

116 MPH

Fuel Economy and Range Comparison

On the EPA test cycle the 640i Coupe gets better fuel mileage than the 911 Coupe:

6 Series

911

RWD

640i/Auto

21 city/32 hwy

20 city/28 hwy

Base/Auto

n/a

19 city/27 hwy

S/Auto

AWD

640i/Auto

20 city/29 hwy

20 city/28 hwy

Base/Auto

n/a

19 city/26 hwy

S/Auto

On the EPA test cycle the 6 Series Convertible gets better fuel mileage than the 911 Cabriolet:

6 Series

911

RWD

640i/Auto

20 city/31 hwy

21 city/28 hwy

Base/Auto

650i/Auto

17 city/25 hwy

19 city/27 hwy

S/Auto

AWD

640i/Auto

20 city/29 hwy

20 city/27 hwy

Base/Auto

650i/Auto

15 city/24 hwy

19 city/26 hwy

S/Auto

Regardless of its engine, the 6 Series’ engine automatically turns off when the vehicle is stopped, saving fuel and reducing pollution. (Start/Stop isn’t accounted in present EPA fuel mileage tests.) The 911 GT3 doesn’t offer an automatic engine start/stop system.

The 6 Series’ standard fuel tank has 1.6 gallons more fuel capacity than the 911 RWD/Turbo/GT3’s standard fuel tank (18.5 vs. 16.9 gallons), for longer range between fill-ups.

Brakes and Stopping Comparison

For better stopping power the 6 Series’ brake rotors are larger than those on the 911:

6 Series

911

Front Rotors

13.7 inches

13 inches

Rear Rotors

13.6 inches

13 inches

Tires and Wheels Comparison

For better traction, the 6 Series has larger standard tires than the 911 (245/45R18 vs. 235/40R19). The M6’s front tires are larger than the largest tires available on the 911 (265/40R19 vs. 245/35R20).

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 911 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. Porsche doesn’t offer an active suspension on the 911.

For a smoother ride and more stable handling, the M6’s wheelbase is 15.7 inches longer than on the 911 (112.2 inches vs. 96.5 inches). The 6 Series’ wheelbase is 15.7 inches longer than on the 911 GT3 Coupe (112.4 feet vs. 96.7 inches).

For better handling and stability, the average track (width between the wheels) on the 6 Series is 3.1 inches wider in the front and 4.1 inches wider in the rear than the average track on the 911.

The 6 Series’ front to rear weight distribution is more even (50.8% to 49.2%) than the 911’s (39.3% to 60.7%). This gives the 6 Series more stable handling and braking.

Chassis Comparison

As tested by Car and Driver, the interior of the M6 Convertible is quieter than the 911 S Cabriolet:

6 Series

911

At idle

48 dB

49 dB

Full-Throttle

88 dB

91 dB

70 MPH Cruising

71 dB

72 dB

Passenger Space Comparison

Because it has more passenger and cargo room, the 6 Series Coupe is rated a Subcompact car by the EPA, while the 911 Coupe is rated a Minicompact. The 6 Series Convertible is rated a Subcompact car by the EPA, while the 911 Cabriolet is rated a Minicompact.

The 6 Series Coupe has 17 cubic feet more passenger volume than the 911 Coupe (87 vs. 70). The 6 Series Convertible has 20 cubic feet more passenger volume than the 911 Cabriolet (88 vs. 68).

The 6 Series Coupe has 2 inches more front headroom, 9.5 inches more front shoulder room, 4.7 inches more rear headroom, 5.5 inches more rear legroom and 4.4 inches more rear shoulder room than the 911 Coupe.

The 6 Series Convertible has 2.3 inches more front headroom and 5.5 inches more rear headroom than the 911 Cabriolet.

Cargo Capacity Comparison

The 6 Series Coupe has a much larger trunk than the 911 Coupe with its rear seat up (13 vs. 5.1 cubic feet). The 6 Series has a much larger trunk with its rear seat folded than the 911 Coupe with its rear seat folded (13 vs. 9.2 cubic feet).

The 6 Series Convertible has a much larger trunk with its top down than the 911 Cabriolet (10.6 vs. 4.8 cubic feet). The 6 Series Convertible has a much larger trunk with its top up than the 911 Cabriolet (12.4 vs. 4.8 cubic feet).

Ergonomics Comparison

Unlike the driver-only memory system optional at extra cost in the 911, the 6 Series offers an optional passenger memory, so that when drivers switch, the memory setting adjusts the driver’s seat, steering wheel position, outside mirror angle, climate settings and radio stations and the front passenger seat also adjusts to the new passenger’s preset preferences.

The 6 Series’ standard easy entry system raises the steering wheel, making it easier for the driver to get in and out. An easy entry system costs extra on the 911.

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 911 doesn’t offer a heads-up display.

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 911 can only operate the windows from inside the vehicle, with the ignition on.

In case of a sudden change of weather, the 6 Series has a standard remote convertible top which can be raised from a distance to protect the interior of the vehicle from damage. The 911 doesn’t offer a remote top, so the driver will have to run to the car, get in, turn the ignition on and raise the top to prevent the interior from being damaged.

While driving with high beams on, sensitive light sensors standard on the 6 Series detect other vehicles which could be blinded and automatically switch to low beams. The 911 doesn’t offer automatic dimming high beams.

A power rear sunshade is optional in the 6 Series Coupe to help block heat and glare for the rear passengers. The 911 doesn’t offer a rear sunshade.

The 6 Series has a standard center folding armrest for the rear passengers. A center armrest helps make rear passengers more comfortable. The 911 doesn’t offer a rear seat center armrest.

For greater rear passenger comfort, the 6 Series has standard rear heat vents to keep rear occupants more comfortable. The 911 doesn’t offer rear vents.

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 911 doesn’t offer an automated parking system.

Economic Advantages Comparison

Intellichoice estimates that five-year ownership costs (depreciation, financing, insurance, fuel, fees, repairs and maintenance) for the BMW 6 Series will be $6545 to $48495 less than for the Porsche 911.

Recommendations Comparison

J.D. Power and Associates rated the 6 Series first among midsize premium sporty cars in owner reported satisfaction. This includes how well the vehicle performs and satisfies its owner’s expectations. The 911 was rated second.

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