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Car Comparison

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Standard Standard
Optional Optional
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2013 Mercedes-Benz SL-Class 2012 Porsche Cayman 2013 Porsche Boxster
     
SL550
  • SL550
  • SL63
  • SL65
2dr Cpe
  • 2dr Cpe
  • 2dr Cpe S
  • 2dr Cpe R
  • 2dr Cpe S Black Edition
2dr Roadster
  • 2dr Roadster
  • 2dr Roadster S

Prices

MSRP $105,500 $51,900 $49,500
Invoice $98,115 $46,530 $44,550
Avg. Paid N/A $41,007 N/A

U.S. News Scores

Overall 8.0 8.5 9.1
Critics' Rating 8.2 9.4 9.2
Performance 8.0 9.4 8.7
Interior 8.1 7.7 8.4
Safety N/A N/A N/A
Reliability 3.5 4.0 4.5
Operating Cost N/A 7.2 N/A

Pros & Cons

Pros
  • Comfortable, yet sporty ride
  • Powerful twin-turbo V8
  • Luxurious interior fit and finish
  • Stellar handling
  • Superb transmissions
  • Excellent performance
  • Luxurious interior
  • Slick, new soft top
Cons
  • Vague steering feel
  • Limited standard features
  • Limited rearward visibility
  • Minimal in-cabin storage

General Specs

Transmission Automatic Manual Manual
Drivetrain Rear Wheel Drive Rear-Wheel Drive Rear-Wheel Drive
Fuel/Engine Turbocharged Gas V8 4.6L/285 Gas Flat 6-Cyl 2.9L/177 Gas Flat-6 2.7L/165
MPG 17 City / 25 Hwy 19 City / 27 Hwy 20 City / 30 Hwy

Exterior

Body

Body Style Convertible 2 Door Coupe Convertible

Dimensions

Wheelbase(in) 101.8 95.1 97.400
Length, Overall (in) 181.8 172.3 172.200
Width, Max w/o mirrors (in) 73.9 70.9 70.900
Height, Overall (in) 51.8 51.3 50.500

Doors & Windows

Rear Defrost Standard Standard Standard
Power Windows Standard Standard Standard

Exterior Features

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

Measurements

Base Curb Weight (lbs) 4001 2932 2888

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
Steel Wheels Optional

Interior

Convenience & Comfort

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

Dimensions

Passenger Capacity 2 2 2
Passenger Volume (cu. ft.) 50.5 - TBD - - TBD -
Front Head Room (in) 39.1 37.6 - TBD -
Front Leg Room (in) 42.9 33.5 - TBD -
Front Shoulder Room (in) 55.5 51.5 - TBD -
Front Hip Room (in) - TBD - - TBD - - TBD -
Trunk Volume (cu. ft.) 13.5/8.5 14.5 9.880

Entertainment

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

Heating & Cooling

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

Navigation & Communication

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

Seats

Leather Seats Standard Standard Standard
Premium Synthetic Seats Optional
Cooled Driver Seat Optional Optional Optional
Cooled Rear Seat Optional
Heated Driver Seat Standard Optional Optional
Heated Rear Seat Optional
Driver Lumbar Standard Standard Optional
Passenger Lumbar Standard Standard Optional
Seat Memory Standard Optional Optional
Power Driver Seat Standard Standard Optional
Power Passenger Seat Standard Standard Optional
Bucket Seats Standard Standard Standard

Safety

Airbags

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

Brakes

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

Safety Features

Brake Assist Standard Standard
Electronic Stability Control Standard Standard Standard
Daytime Running Lights Standard
Integrated Turn Signal Mirrors Standard Standard
Rollover Protection System Standard Standard
Traction Control Standard Standard Standard
Emergency Trunk Release Standard
Blind Spot Monitor Optional
Lane Departure Warning Optional

Mechanical

Engine & Performance

Locking Rear Differential Optional Optional
Rear Wheel Drive Standard Standard Standard
Flat 6 Cylinder Engine Standard Standard
8 Cylinder Engine Standard
Turbocharged Standard
Engine Type Turbocharged Gas V8 Gas Flat 6-Cyl Gas Flat-6
Displacement 4.6L/285 2.9L/177 2.7L/165
Horsepower (Net @ RPM) 429 @ 5250 265 @ 7200 265 @ 6700
Torque (Net @ RPM) 516 @ 1800 - 3500 221 @ 4400-6000 206 @ 4500-6500
Transmission Automatic w/Manual Shift Manual Manual
Turning diameter 36.2 36.4 36.4

Fuel

Gasoline Fuel Standard Standard Standard
EPA Fuel Economy Est - City (MPG) 17 19 20
EPA Fuel Economy Est - Hwy (MPG) 25 27 30
Fuel Tank Capacity, Approx (gal) 19.8 16.9 16.900

Suspension

Active Suspension System Optional Optional
Suspension Type - Front Multi-Link MacPherson Strut MacPherson Strut
Suspension Type - Rear Multi-Link MacPherson Strut Multi-Link
Suspension Type - Front (Cont.) w/Coil Springs w/Coil Springs
Suspension Type - Rear (Cont.) w/Coil Springs w/Coil Springs

Transmission

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