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Compare 2018 Mercedes-Benz SL Class vs 2018 BMW 6-Series

2018 Mercedes-Benz SL Class
2018 BMW 6-Series
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Select style
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
640i Convertible
Style MPG City MPG Hwy Invoice MSRP
6 Series 640i Convertible 20 29 $81,130 $86,700
6 Series 640i Gran Coupe 20 29 $76,200 $81,400
6 Series 640i xDrive Convertible 19 28 $83,920 $89,700
6 Series 640i xDrive Gran Coupe 19 28 $78,990 $84,400
6 Series 640i xDrive Gran Turismo 20 28 $65,785 $70,200
6 Series 650i Convertible 17 25 $91,920 $98,300
6 Series 650i Gran Coupe 17 25 $86,990 $93,000
6 Series 650i xDrive Convertible 16 25 $94,710 $101,300
6 Series 650i xDrive Gran Coupe 16 25 $89,780 $96,000
6 Series ALPINA B6 xDrive Gran Coupe 16 25 $116,100 $124,300
M6 Convertible 14 20 $114,240 $122,300
M6 Gran Coupe 14 20 $111,915 $119,800
Pricing
Invoice Price
$142,151
$81,130
Manufacturer Suggested Retail Price
$152,850
$86,700
Monthly Payment Estimate
$2548 / month
$1445 / month
The Car Connection's Take
TCC Rating
7.6
6.8
TCC’s Bottom Line
The 2018 Mercedes-Benz SL-Class represents the pinnacle of droptop grand touring cruisers. But what does that mean anymore? One of the ultimate grand-tourers, the BMW 6-Series stands ready to eat up miles, buyers' budgets, and premium unleaded.
TCC Likes
TCC Dislikes
Fuel Economy
City
16 mpg 20 mpg
Highway
25 mpg 29 mpg
Vehicle
EPA Classification
Two-Seaters Subcompact Cars
Interior Dimensions
Front Leg Room (in)
42.9 42.1
Passenger Volume (ft³)
50.5 89
Front Hip Room (in)
53.6 -
Front Head Room (in)
39.1 40.3
Passenger Capacity
2 4
Front Shoulder Room (in)
55.5 56.9
Second Head Room (in)
- 36.5
Second Shoulder Room (in)
- 49.6
Second Leg Room (in)
- 30.5
Exterior Dimensions
Track Width, Rear (in)
63.2 65.2
Wheelbase (in)
101.7 112.4
Width, Max w/o mirrors (in)
73.9 74.6
Track Width, Front (in)
63.1 63
Length, Overall (in)
182.7 192.8
Height, Overall (in)
51.2 53.7
Min Ground Clearance (in)
- 4.8
Cargo Area Dimensions
Trunk Volume (ft³)
8.5 10.6
Brakes
Brake ABS System
4-Wheel 4-Wheel
Disc - Rear (Yes or )
Yes Yes
Rear Brake Rotor Diam x Thickness (in)
14.2 13.6
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 13.7
Drum - Rear (Yes or )
NA NA
Fuel Tank
Fuel Tank Capacity, Approx (gal)
19.8 18.5
Steering
Steering Type
Rack-Pinion Rack-Pinion
Turning Diameter - Curb to Curb (ft)
36.4 38.4
Tires
Spare Tire Size
NA NA
Front Tire Order Code
R01 NA
Spare Tire Order Code
NA NA
Rear Tire Size
P285/30YR19 P245/45VR18
Rear Tire Order Code
R01 NA
Front Tire Size
P255/35YR19 P245/45VR18
Weight Information
Base Curb Weight (lbs)
4068 4255
Wheels
Rear Wheel Material
Aluminum Aluminum
Rear Wheel Size (in)
19 X 10 18 X 8
Front Wheel Material
Aluminum Aluminum
Spare Wheel Material
NA NA
Front Wheel Size (in)
19 X 9 18 X 8
Spare Wheel Size (in)
NA NA
Engine
Engine Type
Twin Turbo Premium Unleaded V-8 Intercooled Turbo Premium Unleaded I-6
Fuel System
Gasoline Direct Injection Gasoline Direct Injection
SAE Net Torque @ RPM
664 @ 2250 330 @ 1400
Engine Order Code
NA NA
Displacement
5.5 L/333 3.0 L/182
SAE Net Horsepower @ RPM
577 @ 5500 315 @ 5800
Mileage
EPA Fuel Economy Est - City (MPG)
16 20
Fuel Economy Est-Combined (MPG)
19 23
EPA Fuel Economy Est - Hwy (MPG)
25 29
Transmission
Trans Order Code
427 2TB
Fourth Gear Ratio (:1)
1.37 1.67
Trans Description Cont.
Automatic w/OD Automatic w/OD
Seventh Gear Ratio (:1)
0.73 0.84
Sixth Gear Ratio (:1)
0.82 1.00
First Gear Ratio (:1)
4.38 4.71
Final Drive Axle Ratio (:1)
2.65 3.23
Third Gear Ratio (:1)
1.92 2.11
Trans Type
7 8
Drivetrain
Rear Wheel Drive Rear Wheel Drive
Fifth Gear Ratio (:1)
1.00 1.28
Trans Description Cont. Again
NA NA
Reverse Ratio (:1)
3.42 3.29
Second Gear Ratio (:1)
2.86 3.14
Eighth Gear Ratio (:1)
- 0.67
Summary
Body Style
Roadster Convertible
Vehicle Name
Mercedes-Benz SL BMW 6 Series
Suspension
Suspension Type - Rear
Multi-Link Multi-Link
Suspension Type - Rear (Cont.)
Multi-Link Multi-Link
Suspension Type - Front
Multi-Link Double Wishbone
Suspension Type - Front (Cont.)
Multi-Link Double Wishbone
Emissions
Tons/yr of CO2 Emissions @ 15K mi/year
9.2 7.7
Electrical
Maximum Alternator Capacity (amps)
- 210

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