Compare 2011 BMW Z4 vs 2010 Mercedes-Benz SLK Class vs 2010 Porsche Boxster

2011 BMW Z4
X
2010 Mercedes-Benz SLK Class
X
2010 Porsche Boxster
X
Select style
2-Door Roadster sDrive30i
Style MPG City MPG Hwy Invoice MSRP
2-Door Roadster sDrive30i 18 28 $43,655 $47,450
2-Door Roadster sDrive35i 19 26 $49,080 $53,350
2-Door Roadster sDrive35is 17 24 $57,500 $62,500
Select style
2-Door Roadster SLK 300
Style MPG City MPG Hwy Invoice MSRP
2-Door Roadster SLK 300 18 26 $43,617 $46,900
2-Door Roadster SLK 350 18 25 $48,267 $51,900
2-Door Roadster SLK 55 AMG 14 22 $61,984 $66,650
Select style
2-Door Roadster
Style MPG City MPG Hwy Invoice MSRP
2-Door Roadster 19 27 $42,660 $47,600
2-Door Roadster S 19 26 $52,020 $58,000
Pricing
Invoice Price
$43,655
$43,617
$42,660
Manufacturer Suggested Retail Price
$47,450
$46,900
$47,600
Monthly Payment Estimate
$791 / month
$782 / month
$793 / month
The Car Connection's Take
TCC Rating
7.8
8.4
9.0
TCC’s Bottom Line
The 2011 BMW Z4 is an exhilarating sports car, and one of the better choices for touring, but next to other roadsters it's pricey. The 2010 Mercedes-Benz SLK-Class has the poise and performance of a sports car and the soul of a sunny roadster. The 2010 Porsche Boxster is a fun, attractive, and capable roadster-everything you want it to be.
TCC Likes
TCC Dislikes
Fuel Economy
City
18 mpg 18 mpg 19 mpg
Highway
28 mpg 26 mpg 27 mpg
Vehicle
EPA Classification
Two-Seater Two Seater Two-Seater
Interior Dimensions
Front Head Room (in)
39.1 37.9 37.6
Front Shoulder Room (in)
53.3 52.2 - TBD -
Passenger Volume (ft³)
- TBD - 48.8 - TBD -
Front Leg Room (in)
42.2 42.5 33.5
Passenger Capacity
2 2 2
Front Hip Room (in)
- TBD - 54.6 53.4
Exterior Dimensions
Min Ground Clearance (in)
- TBD - - TBD - 5.0
Length, Overall (in)
167.0 161.5 172.1
Height, Overall (in)
50.8 51.1 50.9
Track Width, Rear (in)
61.4 61.0 60.4
Wheelbase (in)
98.3 95.7 95.1
Liftover Height (in)
- TBD - - TBD - - TBD -
Width, Max w/o mirrors (in)
70.5 70.4 70.9
Track Width, Front (in)
59.5 60.1 58.7
Cargo Area Dimensions
Trunk Volume (ft³)
10.9/6.4 9.8 9.9
Brakes
Front Brake Rotor Diam x Thickness (in)
13.0 x 0.9 11.8 x 1.1 12.5 x - TBD -
Drum - Rear (Yes or )
NA NA NA
Brake ABS System
4-Wheel 4-Wheel 4-Wheel
Disc - Rear (Yes or )
Yes Yes Yes
Rear Brake Rotor Diam x Thickness (in)
11.8 x 0.8 10.9 x 0.4 11.8 x - TBD -
Brake Type
Pwr-Assisted Pwr Pwr
Rear Drum Diam x Width (in)
NA NA NA
Disc - Front (Yes or )
Yes Yes Yes
Fuel Tank
Fuel Tank Capacity, Approx (gal)
14.5 18.5 16.9
Steering
Turning Diameter - Wall to Wall (ft)
- TBD - - TBD - - TBD -
Steering Ratio (:1), Overall
14.4 - TBD - - TBD -
Turning Diameter - Curb to Curb (ft)
35.1 34.5 36.4
Steering Type
Pwr Rack & Pinion Pwr Rack & Pinion Pwr Rack & Pinion
Lock to Lock Turns (Steering)
3.0 2.16 - TBD -
Tires
Rear Tire Size
P225/45R17 P245/40R17 P235/50ZR17
Rear Tire Order Code
NA - TBD - NA
Front Tire Size
P225/45R17 P225/45R17 P205/55ZR17
Spare Tire Size
NA - TBD - NA
Front Tire Order Code
NA - TBD - NA
Spare Tire Order Code
NA NA NA
Trailering
Wt Distributing Hitch - Max Trailer Wt. (lbs)
NA NA NA
Dead Weight Hitch - Max Tongue Wt. (lbs)
NA NA NA
Wt Distributing Hitch - Max Tongue Wt. (lbs)
NA NA NA
Dead Weight Hitch - Max Trailer Wt. (lbs)
NA NA NA
Weight Information
Base Curb Weight (lbs)
3241 3208 2943
Wheels
Spare Wheel Material
NA - TBD - NA
Front Wheel Size (in)
17 x 8.0 17 x 7.5 17 x 7.0
Spare Wheel Size (in)
NA - TBD - NA
Rear Wheel Material
Alloy Aluminum Aluminum
Rear Wheel Size (in)
17 x 8.0 17 x 8.5 17 x 8.5
Front Wheel Material
Alloy Aluminum Aluminum
Cooling System
Total Cooling System Capacity (qts)
- TBD - 11.2 - TBD -
Electrical
Cold Cranking Amps @ 0° F (Primary)
- TBD - - TBD - - TBD -
Maximum Alternator Capacity (amps)
147 90 - TBD -
Engine
Fuel System
Electronic Fuel Injection SMPI Electronic Fuel Injection
SAE Net Torque @ RPM
220 @ 2600 221 @ 2500 - 5000 214 @ 4400-6000
Engine Order Code
NA NA NA
Displacement
3.0L/183 3.0L/183 2.9L/177
SAE Net Horsepower @ RPM
255 @ 6600 228 @ 6000 255 @ 6400
Engine Type
Gas I6 Gas V6 Gas Flat 6-cyl
Mileage
Fuel Economy Est-Combined (MPG)
22 20 22
EPA Fuel Economy Est - Hwy (MPG)
28 26 27
EPA Fuel Economy Est - City (MPG)
18 18 19
Transmission
Sixth Gear Ratio (:1)
0.70 0.84 0.84
First Gear Ratio (:1)
3.50 4.46 3.66
Clutch Size (in)
- TBD - - TBD - - TBD -
Third Gear Ratio (:1)
1.31 1.72 1.40
Trans Type
6 6 6
Drivetrain
Rear Wheel Drive Rear Wheel Drive Rear-Wheel Drive
Fifth Gear Ratio (:1)
0.81 1.00 0.97
Trans Description Cont. Again
NA NA NA
Reverse Ratio (:1)
3.19 4.06 3.33
Second Gear Ratio (:1)
2.01 2.61 2.05
Trans Order Code
NA 411 NA
Final Drive Axle Ratio (:1)
4.27 3.27 3.87
Fourth Gear Ratio (:1)
1.00 1.25 1.13
Trans Description Cont.
Manual Manual w/OD Manual
Seventh Gear Ratio (:1)
- NA NA
Summary
Vehicle Name
BMW Z4 Mercedes-Benz SLK-Class Porsche Boxster
Body Style
2 Dr Conv 2 Door Roadster 2 Door Roadster
Suspension
Stabilizer Bar Diameter - Rear (in)
- TBD - - TBD - - TBD -
Suspension Type - Front (Cont.)
w/Double-Pivot 3-Link w/stabilizer bar w/Coil Springs
Shock Absorber Diameter - Front (mm)
- TBD - - TBD - - TBD -
Stabilizer Bar Diameter - Front (in)
- TBD - - TBD - - TBD -
Suspension Type - Rear
Central Link Independent MacPherson Strut
Suspension Type - Rear (Cont.)
NA 5-Link w/stabilizer bar w/Coil Springs
Shock Absorber Diameter - Rear (mm)
- TBD - - TBD - - TBD -
Suspension Type - Front
Strut-Type Independent MacPherson Strut
Emissions
Tons/yr of CO2 Emissions @ 15K mi/year
8.5 9.3 8.5
EPA Greenhouse Gas Score
5 5 6

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