2015 Porsche 911 vs. 2015 Mercedes-Benz SL-Class
When we compare the 2015 Porsche 911's and the 2015 Mercedes-Benz SL-Class's specifications and ratings, the 2015 Porsche 911 has the advantage in the areas of resale value, interior volume, overall quality score and base engine power. The 2015 Mercedes-Benz SL-Class has the advantage in the areas of typical lower range of pricing for used cars, and fuel efficiency and reliability. Based on this comparison of the 2015 Porsche 911's and the 2015 Mercedes-Benz SL-Class's specifications and ratings, the 2015 Porsche 911 is a better car than the 2015 Mercedes-Benz SL-Class.
2015 Porsche 911 vs. 2015 Mercedes-Benz SL-Class Pricing
A used 2015 Porsche 911 ranges from $67,387 to $138,809 while a used 2015 Mercedes-Benz SL-Class is priced between $31,319 to $68,560.
2015 Porsche 911 vs. 2015 Mercedes-Benz SL-Class Resale/Retained Value
Looking at the 5-year depreciation rate for both models, the 2015 Porsche 911 loses 26.7 percent of its value and the 2015 Mercedes-Benz SL-Class loses 47.2 percent of its value. This means the 2015 Porsche 911 retains 20.5 percentage points more of its value and has the advantage of higher resale value versus the 2015 Mercedes-Benz SL-Class.
2015 Porsche 911 vs. 2015 Mercedes-Benz SL-Class Quality Rating
The iSeeCars Overall Quality rating for the Porsche 911 is 8.2 out of 10 while the Mercedes-Benz SL-Class' quality rating is 7.4 out of 10. This results in the Porsche 911 being ranked 2 out of 26 Best Luxury Convertibles and the Mercedes-Benz SL-Class being ranked 9 out of 26. Out of 40 Best Luxury Sports Cars, the Porsche 911 is ranked 5 and the Mercedes-Benz SL-Class is ranked 16.
2015 Porsche 911 vs. 2015 Mercedes-Benz SL-Class Reliability Rating
iSeeCars’ Reliability Rating for the Porsche 911 is 7.9 out of 10. For the Mercedes-Benz SL-Class the reliability rating is 7.9 out of 10. This gives the Mercedes-Benz SL-Class a slight advantage in reliability compared to the Porsche 911.
Engine Power and Fuel Efficiency Comparison
For engine performance, the 2015 Porsche 911’s base engine makes 350 horsepower, and the 2015 Mercedes-Benz SL-Class base engine makes 329 horsepower. The 911 is rated to deliver an average of 22 miles per gallon, with a highway range of 456 miles. The SL-Class is rated to deliver an average of 23 miles per gallon, with a highway range of 535 miles. This gives the 2015 Mercedes-Benz SL-Class the fuel efficiency and maximum range advantage over the 2015 Porsche 911. Both models use gasoline.
Passenger Space Comparison
While both models are sports cars, the 2015 Porsche 911 has the advantage of offering more interior volume, reflected in more The 2015 Mercedes-Benz SL-Class has the advantage in the areas of front head room, front shoulder room, front leg room, and cargo space.
Pricing
New Asking Price:
-
Used Asking Price:
67387 - 138809
5-Year Depreciation (lower is better):
0.26718
Pricing
New Asking Price:
-
Used Asking Price:
31319 - 68560
5-Year Depreciation (lower is better):
0.472461
Porsche 911 Scores & Rankings
Overall Score:
8.193415 / 10
Reliability:
7.88683 / 10
Retained Value:
8.5 / 10
Safety:
Not available
Mercedes-Benz SL-Class Scores & Rankings
Overall Score:
7.370637 / 10
Reliability:
7.941273 / 10
Retained Value:
6.8 / 10
Safety:
Not available
Porsche 911 Rankings
Ranking
1 out of / 26Ranking
2 out of / 40Ranking
2 out of / 26Ranking
2 out of / 26Ranking
2 out of / 26Ranking
2 out of / 19Ranking
4 out of / 40Ranking
5 out of / 40Ranking
5 out of / 23Ranking
6 out of / 40Ranking
8 out of / 26Ranking
9 out of / 40Ranking
15 out of / 18Ranking
23 out of / 30Mercedes-Benz SL-Class Rankings
Ranking
1 out of / 40Ranking
1 out of / 26Ranking
7 out of / 40Ranking
7 out of / 26Ranking
7 out of / 26Ranking
8 out of / 19Ranking
9 out of / 26Ranking
12 out of / 23Ranking
14 out of / 40Ranking
14 out of / 18Ranking
16 out of / 40Ranking
18 out of / 26Ranking
20 out of / 30Ranking
31 out of / 40Available Body Styles
Convertible, Coupe
Available Body Styles
Convertible
Available Drivetrain Options
Gasoline
Available Drivetrain Options
Gasoline
2015 Porsche 911 Trim Levels
Carrera, Carrera 4, Carrera 4 GTS, Carrera 4S, Carrera GTS, Carrera S, Targa 4, Targa 4S, Turbo, Turbo S, GT3
2015 Mercedes-Benz SL-Class Trim Levels
SL 400, SL 550, SL 63 AMG, SL 65 AMG
Warranty Information
Warranty, Bumper-to-Bumper:
4 years / 50000 miles
Warranty, Powertrain:
4 years / 50000 miles
Warranty, Roadside Assistance:
4 years / 50000 miles
Warranty Information
Warranty, Bumper-to-Bumper:
4 years / 50000 miles
Warranty, Powertrain:
4 years / 50000 miles
Warranty, Roadside Assistance:
4 years / 50000 miles
Safety Ratings
NHTSA Safety Rating (last 5 year average):
Not yet available
IIHS Safety Rating:
Not yet available
Safety Ratings
NHTSA Safety Rating (last 5 year average):
Not yet available
IIHS Safety Rating:
Not yet available
Base Drivetrain Specifications
Horsepower:
350 hp @ 7400 rpm
Torque:
287 foot-lbs @ 5600 rpm
Power-to-Weight Ratio (higher is better):
0.109 hp per pound
Base Drivetrain Specifications
Horsepower:
329 hp @ 5250 rpm
Torque:
354 foot-lbs @ 1600 rpm
Power-to-Weight Ratio (higher is better):
0.086 hp per pound
Engine Specifications
Engine Size:
3.4 liters
Engine Configuration:
Flat/Horizontally Opposed
Number of Cylinders:
6
Transmission:
Manual
Standard/Optional Drivetrain Type:
RWD / AWD
EPA Fuel Economy
(City/Highway/Combined MPG):
19 / 27 / 22
Range (city/hwy):
321 / 456 miles
Recommended Fuel Type:
Gasoline
Engine Specifications
Engine Size:
3 liters
Engine Configuration:
V
Number of Cylinders:
6
Transmission:
Automatic
Standard/Optional Drivetrain Type:
RWD
EPA Fuel Economy
(City/Highway/Combined MPG):
20 / 27 / 23
Range (city/hwy):
396 / 535 miles
Recommended Fuel Type:
Gasoline
Standard/Optional Features
Keyless Entry:
Standard
Leather Upholstery:
Standard
Adaptive Cruise Control:
Available
Cooled/Ventilated Seats:
Available
Heated Seats
Available
Keyless Ignition:
Available
Navigation System:
Available
Android Auto:
N/A
Apple Car Play:
N/A
Heated Steering Wheel:
N/A
Sunroof/Moonroof:
N/A
Wireless Smartphone Charging:
N/A
Standard/Optional Features
Keyless Entry:
Standard
Leather Upholstery:
Standard
Adaptive Cruise Control:
Available
Cooled/Ventilated Seats:
Available
Heated Seats
Standard
Keyless Ignition:
Available
Navigation System:
Standard
Android Auto:
N/A
Apple Car Play:
N/A
Heated Steering Wheel:
Standard
Sunroof/Moonroof:
Standard
Wireless Smartphone Charging:
N/A
Safety Equipment
360-Degree Camera:
N/A
Blind Spot Monitoring:
N/A
Driver Attention Monitoring:
N/A
Forward Collision Warning:
N/A
Lane Departure Warning:
N/A
Lane Keeping Assist:
N/A
Pedestrian Detection:
N/A
Rear Cross-Traffic Alert:
N/A
Rear Seat Reminder:
N/A
Safety Equipment
360-Degree Camera:
N/A
Blind Spot Monitoring:
Available
Driver Attention Monitoring:
Standard
Forward Collision Warning:
Available
Lane Departure Warning:
Available
Lane Keeping Assist:
Available
Pedestrian Detection:
N/A
Rear Cross-Traffic Alert:
N/A
Rear Seat Reminder:
N/A
Interior Dimensions
Front Head Room:
38.4 inches
Front Leg Room:
41.6 inches
Front Shoulder Room:
51.5 inches
Rear Head Room:
Not yet available
Rear Leg Room:
Not yet available
Rear Shoulder Room:
Not yet available
Cargo Space:
5.6 cubic feet
Overall Interior Volume:
68.0 cubic feet
Interior Dimensions
Front Head Room:
39.1 inches
Front Leg Room:
42.9 inches
Front Shoulder Room:
55.5 inches
Rear Head Room:
Not yet available
Rear Leg Room:
Not yet available
Rear Shoulder Room:
Not yet available
Cargo Space:
13.5 cubic feet
Overall Interior Volume:
57.8 cubic feet
Exterior Dimensions
Curb Weight:
3197 lbs
Width:
71.2 inches
Height:
51.1 inches
Length:
176.8 inches
Wheelbase:
96.5 inches
Ground Clearance:
4.6 inches
Exterior Dimensions
Curb Weight:
3836 lbs
Width:
82.6 inches
Height:
51.8 inches
Length:
181.6 inches
Wheelbase:
101.8 inches
Ground Clearance:
Not yet available
Standard Wheel/Tire Information
Wheel Size:
19.0 x 8.5 inches
Wheel Type:
aluminum alloy
Tire Size:
235/40ZR19
Standard Wheel/Tire Information
Wheel Size:
18.0 x 8.5 inches
Wheel Type:
aluminum alloy
Tire Size:
P255/40R18