Certified Benz & Beemer Compares 2008 Porsche 911 VS 2008 BMW 6 Near Scottsdale, AZ

Responsive image

2008 Porsche 911

Responsive image

2008 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.

Engine Comparison

The 911 Turbo’s 3.6 turbo 6 cyl. produces 77 lbs.-ft. more torque (460 vs. 383) than the M6’s optional 5.0 DOHC V10.

As tested in Road & Track the 911 S is faster than the M6 (manual transmissions tested):


6 Series

Zero to 60 MPH

3.9 sec

4.1 sec

Quarter Mile

12.3 sec

12.4 sec

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.

Brakes and Stopping Comparison

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

911 Turbo/GT3



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

99 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 GT3 goes through Road & Track’s slalom 7.4 MPH faster than the 650i Coupe (73.2 vs. 65.8 MPH).

For better maneuverability, the 911’s turning circle is 1.4 feet tighter than the 6 Series’ (36 feet vs. 37.4 feet). The 911’s turning circle is 5 feet tighter than the 6 Series 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.

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 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.

Economic Advantages Comparison

Insurance will cost less for the 911 owner. The Complete Car Cost Guide estimates that insurance for the 911 will cost $467 less than the 6 Series over a five year period.

The 911 will cost the buyer less in the long run because of its superior resale value. The Complete Car Cost Guide estimates that the 911 will retain 49.12% to 56.31% of its original price after five years, while the 6 Series only retains 45.87% to 49.22%.

© 1991-2016 Advanta-STAR Automotive Research. All rights reserved. Who We Are
Click here to view the disclaimers, limitations and notices about EPA fuel mileage, crash tests, coprights, trademarks, and other issues.