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Compare 2018 Mercedes-Benz SL Class vs 2018 Porsche 911

2018 Mercedes-Benz SL Class
2018 Porsche 911
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AMG SL 63 Roadster
Style MPG City MPG Hwy Invoice MSRP
SL AMG SL 63 Roadster 16 25 $142,151 $152,850
SL AMG SL 65 Roadster 13 22 $206,460 $222,000
SL SL 450 Roadster 20 28 $82,026 $88,200
SL SL 550 Roadster 17 25 $104,439 $112,300
Select style
Carrera 4 Convertible
Style MPG City MPG Hwy Invoice MSRP
911 Carrera 4 Convertible 19 28 N/A $110,300
911 Carrera 4 Coupe 20 28 N/A $98,000
911 Carrera 4 GTS Convertible 18 26 N/A $139,900
911 Carrera 4 GTS Coupe 18 26 N/A $127,600
911 Carrera 4S Convertible 19 28 N/A $124,300
911 Carrera 4S Coupe 20 28 N/A $112,000
911 Carrera Convertible 20 29 N/A $103,400
911 Carrera Coupe 20 29 N/A $91,100
911 Carrera GTS Convertible 18 26 N/A $133,000
911 Carrera GTS Coupe 18 26 N/A $120,700
911 Carrera S Convertible 20 28 N/A $117,400
911 Carrera S Coupe 20 29 N/A $105,100
911 Carrera T Coupe 16 25 N/A $102,100
911 GT2 RS Coupe 15 21 N/A $293,200
911 GT3 Coupe 15 20 N/A $143,600
911 Targa 4 19 28 N/A $110,300
911 Targa 4 GTS 18 26 N/A $139,900
911 Targa 4S 19 28 N/A $124,300
911 Turbo Convertible 19 24 N/A $174,100
911 Turbo Coupe 19 24 N/A $161,800
911 Turbo S Convertible 19 24 N/A $203,000
911 Turbo S Coupe 19 24 N/A $190,700
Pricing
Invoice Price
$142,151
N/A
Manufacturer Suggested Retail Price
$152,850
$110,300
Monthly Payment Estimate
$2548 / month
$1838 / month
The Car Connection's Take
TCC Rating
7.6
7.6
TCC’s Bottom Line
The 2018 Mercedes-Benz SL-Class represents the pinnacle of droptop grand touring cruisers. But what does that mean anymore? The 2018 Porsche 911 is a superlative sports car that has defied its age. It’s a classic, but performs better than nearly any newcomer to its arena.
TCC Likes
TCC Dislikes
Fuel Economy
City
16 mpg 19 mpg
Highway
25 mpg 28 mpg
Vehicle
EPA Classification
Two-Seaters Minicompact Cars
Interior Dimensions
Passenger Volume (ft³)
50.5 -
Front Hip Room (in)
53.6 -
Front Head Room (in)
39.1 -
Passenger Capacity
2 4
Front Shoulder Room (in)
55.5 -
Front Leg Room (in)
42.9 -
Exterior Dimensions
Track Width, Front (in)
63.1 60.7
Length, Overall (in)
182.7 177.1
Height, Overall (in)
51.2 50.7
Track Width, Rear (in)
63.2 61.3
Wheelbase (in)
101.7 96.5
Width, Max w/o mirrors (in)
73.9 72.9
Cargo Area Dimensions
Trunk Volume (ft³)
8.5 -
Brakes
Rear Brake Rotor Diam x Thickness (in)
14.2 13
Brake Type
4-Wheel Disc 4-Wheel Disc
Rear Drum Diam x Width (in)
NA NA
Disc - Front (Yes or )
Yes Yes
Front Brake Rotor Diam x Thickness (in)
15.4 13
Drum - Rear (Yes or )
NA NA
Brake ABS System
4-Wheel 4-Wheel
Disc - Rear (Yes or )
Yes Yes
Fuel Tank
Fuel Tank Capacity, Approx (gal)
19.8 17.9
Steering
Turning Diameter - Curb to Curb (ft)
36.4 36.7
Steering Type
Rack-Pinion Rack-Pinion
Tires
Rear Tire Size
P285/30YR19 P295/35YR19
Rear Tire Order Code
R01 NA
Front Tire Size
P255/35YR19 P235/40YR19
Spare Tire Size
NA NA
Front Tire Order Code
R01 NA
Spare Tire Order Code
NA NA
Weight Information
Base Curb Weight (lbs)
4068 3417
Wheels
Front Wheel Material
Aluminum Forged Aluminum
Spare Wheel Material
NA NA
Front Wheel Size (in)
19 X 9 19 X 8.5
Spare Wheel Size (in)
NA NA
Rear Wheel Material
Aluminum Forged Aluminum
Rear Wheel Size (in)
19 X 10 19 X 11.5
Engine
SAE Net Torque @ RPM
664 @ 2250 331 @ 1700
Engine Order Code
NA NA
Displacement
5.5 L/333 3.0 L/182
SAE Net Horsepower @ RPM
577 @ 5500 370 @ 6500
Engine Type
Twin Turbo Premium Unleaded V-8 Twin Turbo Premium Unleaded H-6
Fuel System
Gasoline Direct Injection Gasoline Direct Injection
Mileage
Fuel Economy Est-Combined (MPG)
19 22
EPA Fuel Economy Est - Hwy (MPG)
25 28
EPA Fuel Economy Est - City (MPG)
16 19
Transmission
First Gear Ratio (:1)
4.38 3.91
Final Drive Axle Ratio (:1)
2.65 3.09
Third Gear Ratio (:1)
1.92 1.58
Trans Type
7 7
Drivetrain
Rear Wheel Drive All Wheel
Fifth Gear Ratio (:1)
1.00 0.94
Trans Description Cont. Again
NA NA
Reverse Ratio (:1)
3.42 3.55
Second Gear Ratio (:1)
2.86 2.29
Trans Order Code
427 487
Fourth Gear Ratio (:1)
1.37 1.18
Trans Description Cont.
Automatic w/OD Manual w/OD
Seventh Gear Ratio (:1)
0.73 0.62
Sixth Gear Ratio (:1)
0.82 0.79
Summary
Vehicle Name
Mercedes-Benz SL Porsche 911
Body Style
Roadster Cabriolet
Suspension
Suspension Type - Rear (Cont.)
Multi-Link Multi-Link
Suspension Type - Front
Multi-Link Strut
Suspension Type - Front (Cont.)
Multi-Link Strut
Suspension Type - Rear
Multi-Link Multi-Link
Emissions
Tons/yr of CO2 Emissions @ 15K mi/year
9.2 8.0
Electrical
Cold Cranking Amps @ 0° F (Primary)
- 450
Maximum Alternator Capacity (amps)
- 175

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