2020 Mercedes-Benz SL Class vs 2020 Porsche 911

2020 Mercedes-Benz SL Class

#17 in Convertibles

2020 Porsche 911

#5 in Coupes

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Select style

SL 450 Roadster

Style	MPG City	MPG Hwy	Invoice	MSRP
SL SL 450 Roadster	20	28	$85,540	$91,000
SL SL 550 Roadster	17	25	$107,818	$114,700

Select style

Carrera 4 Convertible

Style	MPG City	MPG Hwy	Invoice	MSRP
911 Carrera 4 Convertible	18	24	N/A	$117,500
911 Carrera 4 Coupe	18	24	N/A	$104,700
911 Carrera 4S Convertible	18	23	N/A	$133,400
911 Carrera 4S Coupe	18	23	N/A	$120,600
911 Carrera Convertible	17	24	N/A	$110,200
911 Carrera Coupe	18	24	N/A	$97,400
911 Carrera S Convertible	18	23	N/A	$126,100
911 Carrera S Coupe	18	24	N/A	$113,300

Show Only Differences

Pricing

Invoice Price

$85,540

N/A

Manufacturer Suggested Retail Price

$91,000

$117,500

Monthly Payment Estimate

$1517 / month

$1958 / month

The Car Connection's Take

TCC Rating

6.0

Read Our Full Review

7.0

Read Our Full Review

TCC’s Bottom Line

The 2020 Mercedes-Benz SL-Class may be the end of the line for the luxury roadster.

The 2020 Porsche 911 improves upon the sports car icon’s incredible performance while adding needed safety and connectivity features.

TCC Likes

Timeless style
Quality construction
Potent powertrains

A sports car icon for good reason
Perfect performance
Wide range of customization

TCC Dislikes

Other Mercedes convertibles more compelling
A profusion of knobs and buttons
Limited storage space

Back seat or penalty box? Hard to tell
Get a second mortgage if you want to buy one
Steering wheel blocks some instruments

Fuel Economy

City

20 mpg

18 mpg

Highway

28 mpg

24 mpg

Vehicle

EPA Classification

Two-Seaters

Minicompact Cars

Interior Dimensions

Front Leg Room (in)

42.9

Passenger Volume (ft³)

50.5

Front Hip Room (in)

53.6

Front Head Room (in)

39.1

Passenger Capacity

Front Shoulder Room (in)

55.5

Exterior Dimensions

Width, Max w/o mirrors (in)

73.9

72.9

Track Width, Front (in)

62.8

62.7

Min Ground Clearance (in)

3.7

Length, Overall (in)

182.3

177.9

Height, Overall (in)

51.2

51.1

Track Width, Rear (in)

61.2

Wheelbase (in)

101.7

96.5

Cargo Area Dimensions

Trunk Volume (ft³)

8.5

Brakes

Rear Brake Rotor Diam x Thickness (in)

12.6

Brake Type

4-Wheel Disc

Rear Drum Diam x Width (in)

Disc - Front (Yes or )

Yes

Front Brake Rotor Diam x Thickness (in)

14.2

Drum - Rear (Yes or )

Brake ABS System

4-Wheel

Disc - Rear (Yes or )

Yes

Fuel Tank

Fuel Tank Capacity, Approx (gal)

19.8

17.6

Steering

Turning Diameter - Curb to Curb (ft)

36.2

36.8

Steering Type

Rack-Pinion

Tires

Spare Tire Order Code

Rear Tire Size

P285/30YR19

P295/35YR20

Rear Tire Order Code

R66

Front Tire Size

P255/35YR19

P235/40YR19

Spare Tire Size

Front Tire Order Code

R66

Weight Information

Base Curb Weight (lbs)

3826

3614

Wheels

Rear Wheel Size (in)

19 X 9.5

20 X 11.5

Front Wheel Material

Aluminum

Spare Wheel Material

Front Wheel Size (in)

19 X 8.5

Spare Wheel Size (in)

Rear Wheel Material

Aluminum

Engine

SAE Net Torque @ RPM

369 @ 2000

331 @ 1950

Engine Order Code

Displacement

3.0 L/183

3.0 L/182

SAE Net Horsepower @ RPM

362 @ 5500

379 @ 6500

Engine Type

Twin Turbo Premium Unleaded V-6

Twin Turbo Premium Unleaded H-6

Fuel System

Gasoline Direct Injection

Mileage

EPA Fuel Economy Est - City (MPG)

Fuel Economy Est-Combined (MPG)

EPA Fuel Economy Est - Hwy (MPG)

Transmission

Sixth Gear Ratio (:1)

1.00

0.94

First Gear Ratio (:1)

5.35

4.89

Eighth Gear Ratio (:1)

0.72

0.61

Final Drive Axle Ratio (:1)

3.07

3.39

Third Gear Ratio (:1)

2.25

2.15

Trans Type

Drivetrain

Rear Wheel Drive

All Wheel

Fifth Gear Ratio (:1)

1.21

1.18

Trans Description Cont. Again

Seventh Gear Ratio (:1)

0.86

0.76

Reverse Ratio (:1)

4.80

3.96

Second Gear Ratio (:1)

3.24

3.17

Trans Order Code

421

G1G

Fourth Gear Ratio (:1)

1.64

1.56

Trans Description Cont.

Automatic w/OD

Auto-Shift Manual w/OD

Summary

Vehicle Name

Mercedes-Benz SL

Porsche 911

Body Style

Roadster

Cabriolet

Suspension

Suspension Type - Rear

Multi-Link

Suspension Type - Rear (Cont.)

Multi-Link

Suspension Type - Front

Multi-Link

Strut

Suspension Type - Front (Cont.)

Multi-Link

Strut

Emissions

Tons/yr of CO2 Emissions @ 15K mi/year

8.0

8.9

2020 Mercedes-Benz SL Class

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2020 Porsche 911

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