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

2018 BMW 6-Series
2018 Mercedes-Benz SL Class
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Gran Turismo 640i xDrive
Style MPG City MPG Hwy Invoice MSRP
Gran Turismo 640i xDrive 20 28 $65,785 $70,200
Gran Coupe 640i 20 29 $76,200 $81,400
Gran Coupe 640i xDrive 19 28 $78,990 $84,400
Convertible 640i 20 29 $81,130 $86,700
Convertible 640i xDrive 19 28 $83,920 $89,700
Gran Coupe 650i 17 25 $86,990 $93,000
Gran Coupe 650i xDrive 16 25 $89,780 $96,000
Convertible 650i 17 25 $91,920 $98,300
Convertible 650i xDrive 16 25 $94,710 $101,300
Gran Coupe ALPINA B6 xDrive 16 25 $116,100 $124,300
Select style
Roadster SL 450
Style MPG City MPG Hwy Invoice MSRP
Roadster SL 450 20 28 $82,026 $88,200
Roadster SL 550 17 25 $104,439 $112,300
Roadster AMG SL 63 16 25 $142,151 $152,850
Roadster AMG SL 65 13 22 $206,460 $222,000
Pricing
Invoice Price
$65,785
$82,026
Manufacturer Suggested Retail Price
$70,200
$88,200
Monthly Payment Estimate
$1170 / month
$1470 / month
The Car Connection's Take
TCC Rating
6.8
7.6
TCC’s Bottom Line
One of the ultimate grand-tourers, the BMW 6-Series stands ready to eat up miles, buyers' budgets, and premium unleaded. The 2018 Mercedes-Benz SL-Class represents the pinnacle of droptop grand touring cruisers. But what does that mean anymore?
TCC Likes
TCC Dislikes
Fuel Economy
City
20 mpg 20 mpg
Highway
28 mpg 28 mpg
Vehicle
EPA Classification
Mid-Size Cars Two-Seaters
Interior Dimensions
Front Leg Room (in)
41.1 42.9
Second Head Room (in)
38.5 -
Passenger Capacity
5 2
Second Shoulder Room (in)
57.1 -
Front Head Room (in)
39.4 39.1
Front Shoulder Room (in)
60 55.5
Second Leg Room (in)
40.4 -
Passenger Volume (ft³)
107 50.5
Front Hip Room (in)
- 53.6
Exterior Dimensions
Track Width, Rear (in)
65 63
Wheelbase (in)
120.9 101.7
Width, Max w/o mirrors (in)
74.9 73.9
Track Width, Front (in)
63.7 62.8
Min Ground Clearance (in)
5.4 -
Length, Overall (in)
200.9 182.3
Height, Overall (in)
60.6 51.2
Cargo Area Dimensions
Cargo Volume with Rear Seat Up (ft³)
31 -
Cargo Volume with Rear Seat Down (ft³)
65 -
Trunk Volume (ft³)
- 8.5
Brakes
Disc - Front (Yes or )
Yes Yes
Drum - Rear (Yes or )
NA NA
Brake ABS System
4-Wheel 4-Wheel
Disc - Rear (Yes or )
Yes Yes
Brake Type
4-Wheel Disc 4-Wheel Disc
Rear Drum Diam x Width (in)
- NA
Front Brake Rotor Diam x Thickness (in)
- 14.2
Rear Brake Rotor Diam x Thickness (in)
- 12.6
Fuel Tank
Fuel Tank Capacity, Approx (gal)
18 19.8
Steering
Turning Diameter - Curb to Curb (ft)
41 36.2
Steering Type
Rack-Pinion Rack-Pinion
Tires
Rear Tire Order Code
NA NA
Front Tire Size
P245/45VR19 P255/35YR19
Spare Tire Size
NA NA
Front Tire Order Code
NA NA
Spare Tire Order Code
NA NA
Rear Tire Size
P245/45VR19 P285/30YR19
Weight Information
Base Curb Weight (lbs)
4409 3826
Wheels
Spare Wheel Material
NA NA
Front Wheel Size (in)
19 X 8.5 19 X 8.5
Spare Wheel Size (in)
NA NA
Rear Wheel Material
Aluminum Aluminum
Rear Wheel Size (in)
19 X 8.5 19 X 9.5
Front Wheel Material
Aluminum Aluminum
Engine
Displacement
3.0 L/183 3.0 L/183
SAE Net Horsepower @ RPM
335 @ 5500 362 @ 5500
Engine Type
Intercooled Turbo Premium Unleaded I-6 Twin Turbo Premium Unleaded V-6
Fuel System
Gasoline Direct Injection Gasoline Direct Injection
SAE Net Torque @ RPM
332 @ 1380 369 @ 2000
Engine Order Code
NA NA
Mileage
Fuel Economy Est-Combined (MPG)
23 23
EPA Fuel Economy Est - Hwy (MPG)
28 28
EPA Fuel Economy Est - City (MPG)
20 20
Transmission
Final Drive Axle Ratio (:1)
3.08 3.07
Third Gear Ratio (:1)
2.14 2.25
Trans Type
8 9
Drivetrain
All Wheel Drive Rear Wheel Drive
Fifth Gear Ratio (:1)
1.31 1.21
Trans Description Cont. Again
NA NA
Seventh Gear Ratio (:1)
0.82 0.86
Reverse Ratio (:1)
3.46 4.80
Second Gear Ratio (:1)
3.20 3.24
Trans Order Code
2TB 421
Fourth Gear Ratio (:1)
1.72 1.64
Trans Description Cont.
Automatic w/OD Automatic w/OD
Sixth Gear Ratio (:1)
1.00 1.00
First Gear Ratio (:1)
5.00 5.35
Eighth Gear Ratio (:1)
0.64 0.72
Summary
Vehicle Name
BMW 6 Series Mercedes-Benz SL
Body Style
Hatchback Roadster
Suspension
Suspension Type - Rear (Cont.)
Multi-Link Multi-Link
Suspension Type - Front
Double Wishbone Multi-Link
Suspension Type - Front (Cont.)
Double Wishbone Multi-Link
Suspension Type - Rear
Multi-Link Multi-Link
Emissions
Tons/yr of CO2 Emissions @ 15K mi/year
7.7 7.6

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