Certified Benz & Beemer Compares 2009 Porsche 911 VS 2009 BMW 6 Near Phoenix, AZ

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2009 Porsche 911

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2009 BMW 6

Safety Comparison

The 911 offers all wheel drive to maximize traction under poor conditions, especially in ice and snow. The 6 Series doesn’t offer all wheel drive.

Both the 911 and the 6 Series have standard driver and passenger frontal airbags, front side-impact airbags, front seatbelt pretensioners, four wheel antilock brakes, traction control and electronic stability systems to prevent skidding.

Reliability Comparison

The 911’s reliability is better than the 6 Series’. In Consumer Reports, the 911’s reliability is 49% better.

J.D. Power and Associates’ 2008 Initial Quality Study of new car owners surveyed provide the statistics that show that Porsche vehicles are better in initial quality than BMW vehicles. J.D. Power ranks Porsche first in initial quality, above the industry average. With 39 more problems per 100 vehicles, BMW is ranked 20th, below the industry average.

Engine Comparison

The 911 has more powerful engines than the 6 Series:



911 S 3.8 DOHC 6 cyl.

385 HP

310 lbs.-ft.

911 GT3 3.6 GT3 6 cyl.

415 HP

300 lbs.-ft.

911 Turbo 3.6 turbo 6 cyl.

480 HP

460 lbs.-ft.

911 GT2 Coupe 3.6 turbo 6 cyl.

530 HP

460 lbs.-ft.

650i 4.8 DOHC V8

360 HP

360 lbs.-ft.

M6 5.0 DOHC V10

500 HP

383 lbs.-ft.

As tested in Car and Driver the Porsche 911 is faster than the M6 (manual transmissions tested):

911 GT3

911 Turbo

6 Series

Zero to 60 MPH

3.8 sec

3.4 sec

4.1 sec

Zero to 100 MPH

8.7 sec

7.8 sec

8.9 sec

Quarter Mile

12 sec

11.7 sec

12.4 sec

Top Speed

193 MPH

185 MPH

162 MPH

For more instantaneous acceleration and better engine flexibility in any gear, the 911’s engines produce their peak torque at lower RPM’s than the 6 Series:


911 3.6 DOHC 6 cyl.

4400 RPM

911 S 3.8 DOHC 6 cyl.

4400 RPM

911 GT3 3.6 GT3 6 cyl.

5500 RPM

911 Turbo 3.6 turbo 6 cyl.

1950 RPM

911 GT2 Coupe 3.6 turbo 6 cyl.

1950 RPM

650i 4.8 DOHC V8

3400 RPM

M6 5.0 DOHC V10

6100 RPM

The flat cylinder configuration of the boxer engine in the 911 lowers its center of gravity, enhancing handling stability. The 6 Series doesn’t offer a boxer engine configuration.

Fuel Economy and Range Comparison

On the EPA test cycle the 911 GT2 gets better fuel mileage than the 650i Coupe Manual (16 city/23 hwy vs. 15 city/22 hwy).

The 911 GT2’s standard fuel tank has 5.3 gallons more fuel capacity than the 6 Series (23.8 vs. 18.5 gallons).

Brakes and Stopping Comparison

For better stopping power the 911 Turbo/GT3/GT2’s front brake rotors are larger than those on the 6 Series:

911 Turbo/GT3/GT2



Front Rotors

14.96 inches

13.7 inches

14.7 inches

The 911 offers optional heat-treated ceramic brake rotors, which last ten to twenty times as long as conventional cast iron rotors, don’t rust, don’t fade during repeated high speed braking, and their lighter weight contribute to better braking, handling and acceleration. The 6 Series doesn’t offer ceramic brake rotors.

The 911 stops much shorter than the 6 Series:


6 Series

80 to 0 MPH

184 feet

209 feet

Road & Track

70 to 0 MPH

145 feet

169 feet

Car and Driver

60 to 0 MPH

98 feet

115 feet

Motor Trend

60 to 0 MPH (Wet)

127 feet

133 feet

Consumer Reports

Tires and Wheels Comparison

For better traction and acceleration, the 911 has larger standard rear tires than the 6 Series (265/40R18 vs. 245/45R18). The 911 Carrera 4 Turbo/GT3’s rear tires are larger than the largest rear tires available on the 6 Series (305/30R19 vs. 285/35R19).

The 911’s standard tires provide better handling because they have a lower 40 series profile (height to width ratio) which provides a stiffer sidewall than the 6 Series’ standard 45 series tires. The 911’s optional 235/35R19 front and 295/30R19 rear tires have a lower 35 series front and 30 series rear profile than the 6 Series’ optional 40 series front and 35 series rear tires.

Suspension and Handling Comparison

The 911 offers an optional driver-adjustable suspension system. It allows the driver to choose between an extra-supple ride, reducing fatigue on long trips, or a sport setting, which allows maximum control for tricky roads. The 6 Series’ suspension doesn’t offer adjustable shock absorbers.

The 911 GT3 handles at 1.05 G’s, while the M6 Coupe pulls only .87 G’s of cornering force in a Car and Driver skidpad test.

The 911 Cabriolet handles at .92 G’s, while the 6 Series Convertible pulls only .89 G’s of cornering force in a Car and Driver skidpad test.

The 911 GT2 Coupe goes through Road & Track’s slalom 10.1 MPH faster than the 650i Coupe (75.9 vs. 65.8 MPH).

For better maneuverability, the 911’s turning circle is 1.4 feet tighter than the 650i’s (36 feet vs. 37.4 feet). The 911’s turning circle is 5 feet tighter than the M6’s (36 feet vs. 41 feet).

Chassis Comparison

The Porsche 911 may be more efficient, handle and accelerate better because it weighs about 650 to 800 pounds less than the BMW 6 Series.

The 911 is 1 foot, 2.6 inches shorter than the 6 Series, making the 911 easier to handle, maneuver and park in tight spaces. The 911 is 1 foot, 2.6 inches shorter than the 6 Series.

The design of the Porsche 911 amounts to more than styling. The 911 offers aerodynamic coefficients of drag from .28 to .31 Cd (depending on bodystyle and options). That is lower than the 6 Series (.3 to .34). A more efficient exterior helps the 911 go faster and keeps the interior quieter. It also helps the 911 get better fuel mileage.

As tested by AutoWeek while at idle, the interior of the 911 Turbo Coupe Carrera 4 is quieter than the M6 Coupe (54 vs. 55 dB).

Cargo Capacity Comparison

The 911’s standard rear seats fold to accommodate long and bulky cargo. The 6 Series doesn’t offer folding rear seats, only a ski pass-through.

Ergonomics Comparison

The 911’s instruments include an oil pressure gauge and a temperature gauge – which could save your engine! Often ‘idiot lights’ don’t warn you until damage has been done. The 6 Series has neither an oil pressure gauge nor a temperature gauge.

To improve rear visibility by keeping the rear window clear, the 911 offers an optional rear wiper. The 6 Series doesn’t offer a rear wiper.

Consumer Reports rated the 911’s headlight performance “Very Good,” a higher rating than the 6 Series’ headlights, which were rated “Good.”

The 911’s optional air conditioned front seats cool the driver and front passenger and help take the sting out of hot leather in Summer. The 6 Series doesn’t offer air conditioned front seats.

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

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