Certified Benz & Beemer Compares 2008 Porsche 911 VS 2008 Ford Shelby Near Phoenix, AZ

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2008 Porsche 911

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VS

2008 Ford Shelby

Safety Comparison

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For enhanced safety, the front seat shoulder belts of the Porsche 911 Coupe are height adjustable to accommodate a wide variety of driver and passenger heights. A better fit can prevent injuries and the increased comfort also encourages passengers to buckle up. The Ford Shelby GT500 doesn’t offer height adjustable seat belts.

The 911 offers all wheel drive to maximize traction under poor conditions, especially in ice and snow. The Shelby GT500 doesn’t offer all wheel drive.

The 911 has standard Porsche Stability Management (PSM), which uses the antilock brake hardware along with powerful software and additional sensors to detect the beginning of a skid. PSM then intervenes by automatically applying the brake at one appropriate wheel, preventing a skid. The Shelby GT500 doesn’t offer skid prevention. A National Highway Traffic Safety Administration study showed that skid control systems reduced single-vehicle car crashes by 30%.

The 911 offers an optional backup radar to help warn drivers about vehicles, pedestrians or other obstacles behind their vehicle. This collision warning system uses radar to detect obstacles behind the rear bumper. The Shelby GT500 doesn’t offer a rear collision sensor.

Both the 911 and the Shelby GT500 have standard driver and passenger frontal airbags, front side-impact airbags, head airbags, front seatbelt pretensioners, four wheel antilock brakes and traction control.

Warranty Comparison

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The 911 comes with a full 4 year/50,000 mile basic warranty, which covers the entire car and includes 24 hour roadside assistance. The Shelby GT500’s 3 year/36,000 mile basic warranty expires 1 year and 14,000 miles sooner.

The 911’s corrosion warranty is 5 years longer than the Shelby GT500’s (10 vs. 5 years).

Engine Comparison

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As tested in Car and Driver the Porsche 911 (base engine) is faster than the Ford Shelby GT500 (base engine) (manual transmissions tested):

911

Shelby GT500

Zero to 60 MPH

4.3 sec

4.8 sec

Zero to 100 MPH

10.5 sec

11.1 sec

Quarter Mile

12.8 sec

13.4 sec

Speed in 1/4 Mile

109 MPH

108 MPH

Top Speed

181 MPH

155 MPH

The flat cylinder configuration of the boxer engine in the 911 lowers its center of gravity, enhancing handling stability. The Shelby GT500 doesn’t offer a boxer engine configuration.

Fuel Economy and Range Comparison

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The 911 RWD’s standard fuel tank has almost a gallon more fuel capacity than the Shelby GT500 (16.9 vs. 16 gallons), for longer range between fill-ups. The 911 AWD’s standard fuel tank has 1.7 gallons more fuel capacity than the Shelby GT500 (17.7 vs. 16 gallons).

Brakes and Stopping Comparison

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For better stopping power the 911 Turbo/GT3’s optional brake rotors are larger than those on the Shelby GT500:

911 Turbo/GT3

Shelby GT500

Front Rotors

14.96 inches

14 inches

Rear Rotors

13.78 inches

11.8 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 Shelby GT500 doesn’t offer ceramic brake rotors.

In an emergency stopping situation, many drivers don’t press the brakes with enough force to stop the vehicle in the shortest distance. The 911 has a standard brake assist system to detect emergency braking situations (by how hard and how quickly the brake pedal is pressed) and then automatically apply maximum braking immediately in order to help prevent a collision. The Shelby GT500 doesn’t offer a brake assist feature.

The 911 stops much shorter than the Shelby GT500:

911

Shelby GT500

80 to 0 MPH

184 feet

216 feet

Road & Track

70 to 0 MPH

145 feet

172 feet

Car and Driver

60 to 0 MPH

99 feet

112 feet

Motor Trend

Tires and Wheels Comparison

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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 Shelby GT500’s standard 45 series front 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 Shelby GT500’s 45 series front and 40 series rear tires.

For better ride, handling and brake cooling the 911 offers optional 19 inch wheels. The Shelby GT500’s largest wheels are only 18 inches.

Suspension and Handling Comparison

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For superior ride and handling, the Porsche 911 has fully independent front and rear suspensions. An independent suspension allows the wheels to follow the road at the best angle for gripping the pavement, without compromising ride comfort. The Ford Shelby GT500 has a solid rear axle, with a non-independent rear suspension.

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 Shelby GT500’s suspension doesn’t offer adjustable shock absorbers.

The 911 GT3 handles at 1.05 G’s, while the Shelby GT500 Coupe pulls only .90 G’s of cornering force in a Car and Driver skidpad test.

The 911 Cabriolet handles at .92 G’s, while the Shelby GT500 Convertible pulls only .86 G’s of cornering force in a Car and Driver skidpad test.

The 911 GT3 goes through Road & Track’s slalom 7.9 MPH faster than the Shelby GT500 Coupe (73.2 vs. 65.3 MPH).

For better maneuverability, the 911’s turning circle is 3.7 feet tighter than the Shelby GT500’s (36 feet vs. 39.7 feet).

Chassis Comparison

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The Porsche 911 may be more efficient, handle and accelerate better because it weighs about 300 to 900 pounds less than the Ford Shelby GT500.

The 911 is 1 foot shorter than the Shelby GT500, making the 911 easier to handle, maneuver and park in tight spaces. The 911 is 1 foot shorter than the Shelby GT500.

For excellent aerodynamics, the 911 has standard flush composite headlights. The Shelby GT500 has recessed headlights which spoil its aerodynamic shape and create extra drag.

As tested by AutoWeek while at idle, the interior of the 911 Turbo Carrera 4 is quieter than the Shelby GT500 Coupe (54 vs. 57 dB).

Ergonomics Comparison

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To help each driver find a more comfortable driving position, the 911 has a telescoping steering wheel. Much better than just a tilt steering wheel or adjustable seat, this allows a short driver to sit further from the steering wheel while maintaining contact with the pedals. The Shelby GT500 doesn’t offer a telescoping steering wheel.

When four different drivers share the 911, the optional memory seats and mirrors make it convenient for all four. Each keyless remote activates different, customized memories for the driver’s seat position and outside mirror angle. The Shelby GT500 doesn’t offer a memory system.

If the windows are left down on the 911 the driver can raise them all using the key in the outside lock cylinder; on a hot day the driver can lower the windows. The driver of the Shelby GT500 can only operate the windows from inside the vehicle, with the ignition on.

The 911 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 Shelby GT500 doesn’t offer a locking fuel door.

The 911’s 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 Shelby GT500’s 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 911 to prevent washer fluid and nozzles from freezing and help continue to keep the windshield clear in sub-freezing temperatures. The Shelby GT500 doesn’t offer heated windshield washer nozzles.

To improve rear visibility by keeping the rear window clear, the 911 offers an optional rear wiper. The Shelby GT500 doesn’t offer a rear wiper.

In poor weather, headlights can lose their effectiveness as grime builds up on their lenses. This can reduce visibility without the driver realizing. The 911 offers available headlight washers to keep headlight output high. The Shelby GT500 doesn’t offer headlight washers.

The 911’s outside mirrors include heating elements to clear off the mirrors for better visibility. The Shelby GT500 doesn’t offer heated side mirrors.

The 911 offers optional 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 Shelby GT500 has an automatic rear view mirror, but its side mirrors don’t dim.

The 911’s optional heated front seats keep the driver and front passenger extremely comfortable in the winter. The Shelby GT500 doesn’t offer heated seats.

The 911 has a standard center folding armrest for the rear passengers. A center armrest helps make rear passengers more comfortable. The Shelby GT500 doesn’t offer a rear seat center armrest.

The 911’s standard automatic temperature control maintains the temperature you set, automatically controlling fan speed, vents and temperature to maintain a consistent, comfortable environment. The Shelby GT500 doesn’t offer automatic air conditioning.

A built-in pollen filter with a charcoal activated canister removes pollen, exhaust fumes and other pollutants from the 911’s passenger compartment. This helps prevent lung and/or sinus irritation, which can trigger allergies or asthma. The Shelby GT500 doesn’t offer a filtration system.

To help keep the driver’s hands on the wheel, the 911 offers optional steering wheel controls for the radio. The Shelby GT500 doesn’t offer steering wheel audio controls.

Economic Advantages Comparison

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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 Shelby GT500 only retains 34.25% to 49.52%.

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