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

2018 Mercedes-Benz SL Class
2018 BMW 6-Series
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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
Select style
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
Pricing
Invoice Price
$82,026
$65,785
Manufacturer Suggested Retail Price
$88,200
$70,200
Monthly Payment Estimate
$1470 / month
$1170 / 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
20 mpg 20 mpg
Highway
28 mpg 28 mpg
Vehicle
EPA Classification
Two-Seaters Mid-Size Cars
Interior Dimensions
Passenger Volume (ft³)
50.5 107
Front Hip Room (in)
53.6 -
Front Head Room (in)
39.1 39.4
Passenger Capacity
2 5
Front Shoulder Room (in)
55.5 60
Front Leg Room (in)
42.9 41.1
Second Head Room (in)
- 38.5
Second Shoulder Room (in)
- 57.1
Second Leg Room (in)
- 40.4
Exterior Dimensions
Track Width, Front (in)
62.8 63.7
Length, Overall (in)
182.3 200.9
Height, Overall (in)
51.2 60.6
Track Width, Rear (in)
63 65
Wheelbase (in)
101.7 120.9
Width, Max w/o mirrors (in)
73.9 74.9
Min Ground Clearance (in)
- 5.4
Cargo Area Dimensions
Trunk Volume (ft³)
8.5 -
Cargo Volume with Rear Seat Up (ft³)
- 31
Cargo Volume with Rear Seat Down (ft³)
- 65
Brakes
Rear Brake Rotor Diam x Thickness (in)
12.6 -
Brake Type
4-Wheel Disc 4-Wheel Disc
Rear Drum Diam x Width (in)
NA -
Disc - Front (Yes or )
Yes Yes
Front Brake Rotor Diam x Thickness (in)
14.2 -
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 18
Steering
Turning Diameter - Curb to Curb (ft)
36.2 41
Steering Type
Rack-Pinion Rack-Pinion
Tires
Rear Tire Size
P285/30YR19 P245/45VR19
Rear Tire Order Code
NA NA
Front Tire Size
P255/35YR19 P245/45VR19
Spare Tire Size
NA NA
Front Tire Order Code
NA NA
Spare Tire Order Code
NA NA
Weight Information
Base Curb Weight (lbs)
3826 4409
Wheels
Front Wheel Material
Aluminum Aluminum
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 9.5 19 X 8.5
Engine
SAE Net Torque @ RPM
369 @ 2000 332 @ 1380
Engine Order Code
NA NA
Displacement
3.0 L/183 3.0 L/183
SAE Net Horsepower @ RPM
362 @ 5500 335 @ 5500
Engine Type
Twin Turbo Premium Unleaded V-6 Intercooled Turbo Premium Unleaded I-6
Fuel System
Gasoline Direct Injection Gasoline Direct Injection
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
First Gear Ratio (:1)
5.35 5.00
Final Drive Axle Ratio (:1)
3.07 3.08
Third Gear Ratio (:1)
2.25 2.14
Trans Type
9 8
Drivetrain
Rear Wheel Drive All Wheel Drive
Fifth Gear Ratio (:1)
1.21 1.31
Trans Description Cont. Again
NA NA
Eighth Gear Ratio (:1)
0.72 0.64
Reverse Ratio (:1)
4.80 3.46
Second Gear Ratio (:1)
3.24 3.20
Trans Order Code
421 2TB
Fourth Gear Ratio (:1)
1.64 1.72
Trans Description Cont.
Automatic w/OD Automatic w/OD
Seventh Gear Ratio (:1)
0.86 0.82
Sixth Gear Ratio (:1)
1.00 1.00
Summary
Vehicle Name
Mercedes-Benz SL BMW 6 Series
Body Style
Roadster Hatchback
Suspension
Suspension Type - Rear (Cont.)
Multi-Link Multi-Link
Suspension Type - Front
Multi-Link Double Wishbone
Suspension Type - Front (Cont.)
Multi-Link Double Wishbone
Suspension Type - Rear
Multi-Link Multi-Link
Emissions
Tons/yr of CO2 Emissions @ 15K mi/year
7.6 7.7

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