Compare 2012 BMW Z4 vs 2012 Mercedes-Benz SLK Class vs 2012 Porsche Boxster

2012 BMW Z4
X
2012 Mercedes-Benz SLK Class
X
2012 Porsche Boxster
X
Select style
2-Door Roadster sDrive28i
Style MPG City MPG Hwy Invoice MSRP
Z4 2-Door Roadster sDrive28i 23 34 $44,760 $48,650
Z4 2-Door Roadster sDrive35i 19 26 $50,740 $55,150
Z4 2-Door Roadster sDrive35is 17 24 $59,065 $64,200
Select style
2-Door Roadster SLK 250
Style MPG City MPG Hwy Invoice MSRP
SLK-Class 2-Door Roadster SLK 250 22 32 $39,525 $42,500
SLK-Class 2-Door Roadster SLK 350 20 29 $50,964 $54,800
SLK-Class 2-Door Roadster SLK 55 AMG 19 28 $62,775 $67,500
Select style
2-Door Roadster
Style MPG City MPG Hwy Invoice MSRP
Boxster 2-Door Roadster 19 27 $43,110 $48,100
Boxster 2-Door Roadster S 19 26 $52,560 $58,600
Boxster 2-Door Roadster S Black Edition 19 26 $58,500 $65,200
Boxster 2-Door Roadster Spyder 19 26 $55,440 $61,800
Pricing
Invoice Price
$44,760
$39,525
$43,110
Manufacturer Suggested Retail Price
$48,650
$42,500
$48,100
Monthly Payment Estimate
$811 / month
$708 / month
$802 / month
The Car Connection's Take
TCC Rating
7.8
8.4
9.0
TCC’s Bottom Line
The 2012 BMW Z4 is a great option for the driver seeking a balance of fun and comfort, making it a great light tourer, but it can quickly become expensive with added options. It may be the most pragmatic roadster of its kind, but the SLK 350 dares you to doubt its partying skills. Stylish, fun, and capable, the 2012 Porsche Boxster is one of the best roadsters around.
TCC Likes
TCC Dislikes
Fuel Economy
City
23 mpg 22 mpg 19 mpg
Highway
34 mpg 32 mpg 27 mpg
Vehicle
EPA Classification
Two Seaters 2 Seater Two-Seater
Interior Dimensions
Front Leg Room (in)
42.2 42.5 33.5
Passenger Capacity
2 2 2
Front Hip Room (in)
- TBD - - TBD - 53.4
Front Head Room (in)
39.1 38.0 37.6
Front Shoulder Room (in)
53.3 52.2 51.5
Passenger Volume (ft³)
- TBD - 49.0 - TBD -
Exterior Dimensions
Track Width, Rear (in)
61.4 61.6 60.4
Wheelbase (in)
98.3 95.7 95.1
Liftover Height (in)
- TBD - - TBD - - TBD -
Width, Max w/o mirrors (in)
70.5 71.5 70.9
Track Width, Front (in)
59.5 61.4 58.7
Min Ground Clearance (in)
5.1 - TBD - 5.0
Length, Overall (in)
167.0 162.8 172.1
Height, Overall (in)
50.8 51.2 50.9
Cargo Area Dimensions
Trunk Volume (ft³)
10.9/6.4 10.1 (6.4 w/top down) 9.9
Brakes
Disc - Rear (Yes or )
Yes Yes Yes
Rear Brake Rotor Diam x Thickness (in)
11.8 x 0.8 11.8 x 0.4 11.8 x 0.8
Brake Type
Pwr Pwr Pwr
Rear Drum Diam x Width (in)
NA NA NA
Disc - Front (Yes or )
Yes Yes Yes
Front Brake Rotor Diam x Thickness (in)
13.0 x 0.9 12.7 x 1.3 12.5 x 1.1
Drum - Rear (Yes or )
NA NA NA
Brake ABS System
4-Wheel 4-Wheel 4-Wheel
Fuel Tank
Fuel Tank Capacity, Approx (gal)
14.5 15.9 16.9
Steering
Turning Diameter - Curb to Curb (ft)
35.1 34.5 36.4
Steering Type
Electric Rack & Pinion Pwr Rack & Pinion Pwr Rack & Pinion
Lock to Lock Turns (Steering)
3.0 - TBD - 2.6
Turning Diameter - Wall to Wall (ft)
- TBD - - TBD - - TBD -
Steering Ratio (:1), Overall
14.4 - TBD - 17.1-13.8
Tires
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
Rear Tire Size
P225/45R17 P245/40R17 P235/50ZR17
Rear Tire Order Code
NA - TBD - NA
Trailering
Dead Weight Hitch - Max Tongue Wt. (lbs)
NA NA - TBD -
Wt Distributing Hitch - Max Tongue Wt. (lbs)
NA NA - TBD -
Dead Weight Hitch - Max Trailer Wt. (lbs)
NA NA - TBD -
Wt Distributing Hitch - Max Trailer Wt. (lbs)
NA NA - TBD -
Weight Information
Base Curb Weight (lbs)
3307 3308 2943
Wheels
Spare Wheel Size (in)
NA - TBD - NA
Rear Wheel Material
Aluminum Aluminum Aluminum
Rear Wheel Size (in)
17 x 8 17 x 8.5 17 x 8.5
Front Wheel Material
Aluminum Aluminum Aluminum
Spare Wheel Material
NA - TBD - NA
Front Wheel Size (in)
17 x 8 17 x 7.5 17 x 7.0
Cooling System
Total Cooling System Capacity (qts)
8.7 - TBD - - TBD -
Electrical
Cold Cranking Amps @ 0° F (Primary)
- TBD - - TBD - - TBD -
Maximum Alternator Capacity (amps)
170 - TBD - - TBD -
Engine
Displacement
2.0L/122 1.8L/110 2.9L/177
SAE Net Horsepower @ RPM
240 @ 5000 201 @ 5500 255 @ 6400
Engine Type
Turbocharged Gas I4 Gas I4 Gas Flat-6
Fuel System
Direct Injection Direct Injection Electronic Fuel Injection
SAE Net Torque @ RPM
260 @ 1250 - 4800 229 @ 2000 - 4300 214 @ 4400-6000
Engine Order Code
NA NA NA
Mileage
EPA Fuel Economy Est - City (MPG)
23 22 19
Fuel Economy Est-Combined (MPG)
27 26 22
EPA Fuel Economy Est - Hwy (MPG)
34 32 27
Transmission
Eighth Gear Ratio (:1)
NA - -
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)
3.35 4.06 3.33
Second Gear Ratio (:1)
2.06 2.61 2.05
Seventh Gear Ratio (:1)
NA NA NA
Trans Order Code
NA 411 480
Final Drive Axle Ratio (:1)
3.08 3.07 3.88
Fourth Gear Ratio (:1)
1.00 1.25 1.13
Trans Description Cont.
Manual Manual Manual
Sixth Gear Ratio (:1)
0.68 0.84 0.84
First Gear Ratio (:1)
3.68 4.46 3.67
Clutch Size (in)
- TBD - - TBD - 9.4
Third Gear Ratio (:1)
1.31 1.72 1.40
Summary
Body Style
Convertible 2 Door Roadster Convertible
Vehicle Name
BMW Z4 Mercedes-Benz SLK-Class Porsche Boxster
Suspension
Stabilizer Bar Diameter - Front (in)
NA NA - TBD -
Suspension Type - Rear
Independent Multi-Link MacPherson Strut
Suspension Type - Rear (Cont.)
NA w/Coil Springs w/Coil Springs
Shock Absorber Diameter - Rear (mm)
NA - TBD - - TBD -
Suspension Type - Front
Independent Independent MacPherson Strut
Stabilizer Bar Diameter - Rear (in)
NA NA - TBD -
Suspension Type - Front (Cont.)
NA w/Coil Springs w/Coil Springs
Shock Absorber Diameter - Front (mm)
NA - TBD - - TBD -
Emissions
EPA Greenhouse Gas Score
6 - TBD - 5
Tons/yr of CO2 Emissions @ 15K mi/year
6.7 7.1 8.5

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