Certified Benz & Beemer Compares 2009 Porsche 911 VS 2009 Dodge Viper Near Phoenix, AZ

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2009 Porsche 911

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2009 Dodge Viper

Safety Comparison

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 Dodge Viper doesn’t offer height adjustable seat belts.

The 911 has standard front seat side-impact airbags and head airbags, which act as a forgiving barrier between the passengers and the door. Combined with high-strength steel door beams this system increases protection from broadside collisions. The Viper doesn't offer side-impact airbags or side airbag protection for the head.

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

To prevent wheelspin and loss of control under poor traction conditions, full range traction control is standard on the Porsche 911. The Dodge Viper doesn’t offer traction control.

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 Viper 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 Porsche 911 has Daytime Running Lights to help keep it more visible under all conditions. Canadian government studies show that driving with lights during the day reduces accidents by 11% by making vehicles more conspicuous. The Viper doesn’t offer Daytime Running Lights.

The 911 offers optional parking sensors to help warn drivers about vehicles, pedestrians or other obstacles behind their vehicle. The Viper doesn’t offer any parking assist system.

Both the 911 and the Viper have standard driver and passenger frontal airbags, front seatbelt pretensioners and four wheel antilock brakes.

Warranty Comparison

The 911 comes with a full 4 year/50,000 mile basic warranty, which covers the entire car. The Viper’s 3 year/36,000 mile basic warranty expires 1 year and 14,000 miles sooner.

The 911 comes with free roadside assistance for 4 years 50,000 miles. Porsche will send help if you run out of gas, need a jump start, lock your keys in or need any assistance on the road. Dodge doesn’t give free roadside assistance for the Viper.

The 911’s corrosion warranty is 5 years and unlimited miles longer than the Viper’s (10/unlimited vs. 5/100,000).

Reliability Comparison

For smoother operation, better efficiency and fewer moving parts, the engines in the 911 have an overhead cam design, rather than the old pushrod design of the engine in the Viper.

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 Dodge vehicles. J.D. Power ranks Porsche first in initial quality, above the industry average. With 54 more problems per 100 vehicles, Dodge is ranked 27th, below the industry average.

Engine Comparison

As tested in Motor Trend the 911 Turbo is faster than the Dodge Viper (manual transmissions tested):



Zero to 60 MPH

3.4 sec

3.7 sec

Zero to 100 MPH

7.3 sec

7.9 sec

Quarter Mile

11.4 sec

11.7 sec

Speed in 1/4 Mile

127.9 MPH

124.4 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 Viper:


911 3.6 DOHC 6 cyl.

4400 RPM

911 S 3.8 DOHC 6 cyl.

4400 RPM

911 Turbo 3.6 turbo 6 cyl.

1950 RPM

911 GT2 Coupe 3.6 turbo 6 cyl.

1950 RPM

Viper 8.4 V10

5000 RPM

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

Fuel Economy and Range Comparison

On the EPA test cycle the 911 GT2 Coupe gets better fuel mileage than the Viper (16 city/23 hwy vs. 13 city/22 hwy).

The 911 RWD’s standard fuel tank has almost a gallon more fuel capacity than the Viper (16.9 vs. 16 gallons), for longer range between fill-ups. The 911 GT2’s standard fuel tank has 7.8 gallons more fuel capacity than the Viper (23.8 vs. 16 gallons).

Brakes and Stopping Comparison

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

911 Turbo/GT3/GT2


Front Rotors

14.96 inches

14 inches

The 911 Turbo/GT3/GT2’s brakes have 23% more swept area (the area covered by the brake pads) than the Viper (740 vs. 603 square 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 Viper 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 Viper doesn’t offer a brake assist feature.

The 911 stops much shorter than the Viper:



80 to 0 MPH

184 feet

198 feet

Road & Track

70 to 0 MPH

145 feet

150 feet

Car and Driver

Tires and Wheels Comparison

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

Suspension and Handling Comparison

The 911 GT3 handles at 1.05 G’s, while the Viper Coupe pulls only 1.00 G’s of cornering force in a Car and Driver skidpad test.

The 911 GT2 Coupe goes through Road & Track’s slalom 6.2 MPH faster than the Viper Coupe (75.9 vs. 69.7 MPH).

For better maneuverability, the 911’s turning circle is 4.5 feet tighter than the Viper’s (36 feet vs. 40.5 feet).

Chassis Comparison

The Porsche 911 may be more efficient, handle and accelerate better because it weighs up to about 350 pounds less than the Dodge Viper.

As tested by AutoWeek, the interior of the 911 Turbo Coupe Carrera 4 is quieter than the Viper Coupe:



At idle

54 dB

62 dB


79 dB

84 dB

60 MPH Cruising

67 dB

77 dB

Passenger Space Comparison

The 911 has standard seating for 4 passengers; the Viper can only carry 2.

The 911 has 16 cubic feet more passenger volume than the Viper (64 vs. 48).

Cargo Capacity Comparison

The 911 Cabriolet has a much larger trunk than the Viper Roadster (9.9 vs. 8.4 cubic feet).

Ergonomics Comparison

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 Viper doesn’t offer a memory system.

The 911’s front power windows 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 Viper’s power windows’ switches have to be held the entire time to close them fully.

The 911’s standard power window controls are mounted on the armrest for easy access. The Viper’s available power window controls are spread out on the center console where they can’t be seen without the driver completely removing his eyes from the road.

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 Viper 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 Viper 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 Viper’s manually variable intermittent wipers have to be constantly adjusted.

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 Viper 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 Viper 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 Viper doesn’t offer headlight washers.

To help drivers see further while navigating curves, the 911 offers optional adaptive headlights to illuminate around corners automatically by reading vehicle speed and steering wheel angle. The Viper doesn’t offer cornering lights.

The 911’s standard side window demisters help clear frost or condensation from the side windows in the winter. The Viper doesn’t even offer side window demisters, so the driver may have to wipe the windows from the outside to gain side vision.

The 911’s sun-visors swivel front-to-side to block glare from the side windows. The Viper’s visors are fixed into the windshield header.

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

The 911’s optional rear and side view mirrors have an automatic dimming feature. This mirror can be set to automatically darken quickly when headlights shine on it, keeping following vehicles from blinding or distracting the driver. The Viper doesn’t offer the luxury of automatic dimming mirrors.

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

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 Viper doesn’t offer air conditioned front seats.

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 Viper 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 Viper 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 Viper doesn’t offer steering wheel audio controls.

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