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Car Comparison

Use this tool to compare car rankings, scores, prices and specs for your top picks. You can compare SUVs, cars or trucks and you can compare new cars and used cars. Then use our Best Price Program to get a great deal on new cars or search our huge collection of used car listings.

Standard Standard
Optional Optional
X Remove X Remove X Remove
2014 Mercedes-Benz SL-Class 2014 Porsche 911 2014 Audi R8
SL550
  • SL550
  • SL63 AMG
  • SL65 AMG
2dr Cpe Carrera
  • 2dr Cabriolet Carrera 4
  • 2dr Cpe Carrera 4S
  • 2dr Cabriolet Carrera S
  • 2dr Cabriolet Carrera 4S
  • 2dr Cpe 50th Anniversary Edition
  • 2dr Cpe GT3
  • 2dr Cpe Turbo
  • 2dr Cpe S Turbo
  • 2dr Cpe Carrera
  • 2dr Cpe Carrera 4
  • 2dr Cabriolet Carrera
  • 2dr Cpe Carrera S
Manual quattro V8
  • Manual quattro V8
  • Auto quattro V8
  • Manual quattro V8
  • Auto quattro V8
  • Manual quattro V10
  • Auto quattro V10
  • Manual quattro V10
  • Manual quattro V10 plus
  • Auto quattro V10
  • Auto quattro V10 plus

Prices

MSRP $106,700 $84,300 $114,900
Invoice $99,231 $0 $106,857
Avg. Paid N/A N/A $111,837

U.S. News Scores

Overall 8.3 9.0 8.4
Critics' Rating 8.7 8.8 8.9
Performance 8.0 9.1 9.0
Interior 8.4 8.2 8.2
Safety N/A N/A N/A
Reliability 3.5 5.0 3.0

Pros & Cons

Pros
  • Brisk acceleration with any engine
  • First-rate interior design
  • Phenomenal handling
  • Potent engine options
  • Top-quality interior
  • Upscale, comfortable interior
  • Impressive engine power and handling
  • Comfortable to drive on a daily basis
Cons
  • Less engaging to drive than rivals
  • Meager cargo space
  • Meager cargo space

General Specs

Transmission Automatic Manual Manual
Drivetrain Rear Wheel Drive Rear Wheel Drive All Wheel Drive
Fuel/Engine Twin Turbo Premium Unleaded V-8 4.7 L/285 Premium Unleaded H-6 3.4 L/210 Premium Unleaded V-8 4.2 L/254
MPG 18 City / 25 Hwy 19 City / 27 Hwy 11 City / 20 Hwy

Exterior

Body

Body Style Convertible Coupe Coupe

Dimensions

Wheelbase(in) 101.8 96.5 104.3
Length, Overall (in) 181.6 176.8 175
Width, Max w/o mirrors (in) 73.9 71.2 75
Height, Overall (in) 51.8 51.3 49.3

Doors & Windows

Rear Defrost Standard Standard Standard
Power Windows Standard Standard Standard

Exterior Features

Convertible Hardtop Standard
Sun/Moon Roof Standard Optional
Power Tilt/Sliding Sunroof Standard Optional
Rear Spoiler Standard Standard

Measurements

Base Curb Weight (lbs) 3935 3042 3583

Tires & Wheels

Tires - Front Performance Standard Standard Standard
Tires - Rear Performance Standard Standard Standard
Tire Pressure Monitoring System Standard Standard Standard
Aluminum Wheels Standard Standard Standard
Wheel Locks Standard Standard

Interior

Convenience & Comfort

Alarm Standard Standard Standard
Back-Up Camera Standard Optional
Cruise Control Standard Standard Standard
Vehicle Anti-Theft System Standard Standard Standard
Fog Lamps Standard
Auto-Off Headlights Standard Standard
HID headlights Standard Standard
Luggage Rack Optional
Rear Parking Aid Optional Optional
Adjustable Steering Wheel Standard Standard Standard
Steering Wheel Controls Standard Optional Standard
Leather Wrapped Steering Wheel Standard Standard Standard
Trip Computer Standard Standard Standard
Remote Trunk Release Standard
Universal Garage Door Opener Standard Standard Standard
Intermittent Wipers Standard Standard Standard
Rain Sensing Wipers Standard Standard Standard
Variable Speed Intermittent Wipers Standard Standard Standard
Front Floor Mats Standard Standard Standard
Keyless Entry Standard Standard Standard
Power Door Locks Standard Standard Standard
Electrochromic rearview mirror Standard Optional Standard
Heated Mirrors Standard Standard Standard
Mirror Memory Standard Optional
Power Driver Mirror Standard Standard Standard
Power Folding Mirrors Standard Optional Optional
Driver Vanity Mirror Standard Standard Standard
Driver Illuminated Vanity Mirror Standard Standard Standard
Passenger Vanity Mirror Standard Standard Standard
Passenger Illuminated Visor Mirror Standard Standard Standard
Power Steering Standard Standard Standard

Dimensions

Passenger Capacity 2 4 2
Front Head Room (in) 39.1 37.7
Front Leg Room (in) 42.9 41
Front Shoulder Room (in) 55.5 54.8
Front Hip Room (in) 53.6
Trunk Volume (cu. ft.) 8.5

Entertainment

AM/FM Stereo Standard Standard Standard
Auxiliary Audio Input Standard Standard Standard
CD Changer Standard Optional Standard
CD Player Standard Standard Standard
HD Radio Standard Optional
MP3 Player Standard Standard Standard
Satellite Radio Standard Optional Standard
Premium Sound System Standard Optional Optional
Entertainment System Optional
Hard Disk Drive Standard

Heating & Cooling

Climate Control Standard Standard Standard
Dual Zone A/C Standard Standard
A/C Standard Standard Standard

Navigation & Communication

Navigation System Standard Standard Optional
Onboard Hands-Free Communications System Standard
Wireless Cell Phone Hookup Standard Standard Standard

Seats

Leather Seats Standard Standard Standard
Premium Synthetic Seats Standard
Cooled Driver Seat Standard Optional
Heated Driver Seat Standard Optional Standard
Driver Lumbar Optional Standard
Passenger Lumbar Optional Standard
Seat Memory Standard Optional
Power Driver Seat Standard Standard Standard
Power Passenger Seat Standard Standard Standard
Pass-Through Rear Seat Standard
2nd Row Bench Seat Standard
Bucket Seats Standard Standard Standard

Safety

Airbags

Driver Air Bag Standard Standard Standard
Passenger Air Bag On/Off Switch Standard
Passenger Air Bag Standard Standard Standard
Side Head Air Bag Standard Standard
Side Air Bag Standard Standard Standard

Brakes

4-Wheel ABS Standard Standard Standard
4-Wheel Disc Brakes Standard Standard Standard

Safety Features

Brake Assist Standard Standard Standard
Electronic Stability Control Standard Standard Standard
Daytime Running Lights Standard Standard Standard
Integrated Turn Signal Mirrors Standard Standard
Night Vision Optional
Rollover Protection System Standard
Traction Control Standard Standard Standard
Blind Spot Monitor Optional
Auto-Leveling Headlights Standard Standard
Lane Departure Warning Optional

Mechanical

Engine & Performance

Locking Rear Differential Optional
All Wheel Drive Standard
Rear Wheel Drive Standard Standard
Flat 6 Cylinder Engine Standard
8 Cylinder Engine Standard Standard
Turbocharged Standard
Engine Type Twin Turbo Premium Unleaded V-8 Premium Unleaded H-6 Premium Unleaded V-8
Displacement 4.7 L/285 3.4 L/210 4.2 L/254
Horsepower (Net @ RPM) 429 @ 5250 350 @ 7400 430 @ 7900
Torque (Net @ RPM) 516 @ 1800 287 @ 5600 317 @ 4500
Transmission Automatic w/OD Manual w/OD Manual w/OD
Turning diameter 36.2 36.4 38.7

Fuel

Gasoline Fuel Standard Standard Standard
EPA Fuel Economy Est - City (MPG) 18 19 11
EPA Fuel Economy Est - Hwy (MPG) 25 27 20
Fuel Tank Capacity, Approx (gal) 19.8 16.9 23.8

Suspension

Active Suspension System Standard Optional Standard
Suspension Type - Front Multi-Link Strut Double Wishbone
Suspension Type - Rear Multi-Link Multi-Link Double Wishbone
Suspension Type - Front (Cont.) Multi-Link Strut Double Wishbone
Suspension Type - Rear (Cont.) Multi-Link Multi-Link Double Wishbone

Transmission

Automatic Standard Optional
Automatic Transmission w/Manual Mode Standard Optional
7-Speed Automatic Standard Optional
Manual Standard Standard
6-Speed Manual Standard
7-Speed Manual Standard

Safety scores should only be compared between vehicles of similar size and weight. Larger, heavier vehicles generally provide more protection than smaller, lighter ones.