Compare 2013 BMW Z4 vs 2013 Mercedes-Benz SLK Class vs 2013 Porsche Boxster

2013 BMW Z4
X
2013 Mercedes-Benz SLK Class
X
2013 Porsche Boxster
X
Select style
2-Door Roadster sDrive28i
Style MPG City MPG Hwy Invoice MSRP
Z4 2-Door Roadster sDrive28i 22 34 $43,560 $47,350
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 $39,897 $42,900
SLK-Class 2-Door Roadster SLK 350 21 29 $51,522 $55,400
SLK-Class 2-Door Roadster SLK 55 AMG 19 28 $63,231 $67,990
Select style
2-Door Roadster
Style MPG City MPG Hwy Invoice MSRP
Boxster 2-Door Roadster 20 30 $44,550 $49,500
Boxster 2-Door Roadster S N/A N/A $54,810 $60,900
Pricing
Invoice Price
$43,560
$39,897
$44,550
Manufacturer Suggested Retail Price
$47,350
$42,900
$49,500
Monthly Payment Estimate
$789 / month
$715 / month
$825 / month
The Car Connection's Take
TCC Rating
7.8
8.4
9.0
TCC’s Bottom Line
The 2013 BMW Z4 is spirited and purposeful, and balances fun and comfort quite well, but it's pricier than other roadsters. The 2013 Mercedes-Benz SLK is the least polarizing of the roadsters, but there's enough urgency to go with its elegant, mini-SL charm. The 2013 Porsche Boxster is one of the most fun, stylish, and luxurious roadsters available.
TCC Likes
TCC Dislikes
Fuel Economy
City
22 mpg 22 mpg 20 mpg
Highway
34 mpg 32 mpg 30 mpg
Vehicle
EPA Classification
Two Seaters 2 Seater Two-Seater
Interior Dimensions
Front Leg Room (in)
42.200 42.5 - TBD -
Passenger Capacity
2 2 2
Front Hip Room (in)
- TBD - - TBD - - TBD -
Front Head Room (in)
- TBD - 38.0 - TBD -
Front Shoulder Room (in)
53.300 52.2 - TBD -
Passenger Volume (ft³)
- TBD - 49.0 - TBD -
Exterior Dimensions
Liftover Height (in)
- TBD - - TBD - - TBD -
Width, Max w/o mirrors (in)
70.500 71.5 70.900
Track Width, Front (in)
59.500 61.4 60.100
Min Ground Clearance (in)
5.100 - TBD - - TBD -
Length, Overall (in)
167.000 162.8 172.200
Height, Overall (in)
50.800 51.2 50.500
Track Width, Rear (in)
- TBD - 61.6 60.5
Wheelbase (in)
98.300 95.7 97.400
Cargo Area Dimensions
Trunk Volume (ft³)
10.900/6.400 10.1 (6.4 w/top down) 9.880
Brakes
Disc - Rear (Yes or )
Yes Yes Yes
Rear Brake Rotor Diam x Thickness (in)
11.800 x 0.800 11.8 x 0.4 11.771 x - TBD -
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)
13.000 x 0.900 12.7 x 1.3 12.401 x - TBD -
Drum - Rear (Yes or )
NA NA NA
Brake ABS System
4-Wheel 4-Wheel 4-Wheel
Fuel Tank
Fuel Tank Capacity, Approx (gal)
14.500 15.9 16.900
Steering
Turning Diameter - Curb to Curb (ft)
35.100 34.5 36.4
Steering Type
Electric Rack & Pinion Pwr Rack & Pinion Electric Rack & Pinion
Lock to Lock Turns (Steering)
3.000 - TBD - 2.6
Turning Diameter - Wall to Wall (ft)
- TBD - - TBD - - TBD -
Steering Ratio (:1), Overall
14.400 - TBD - 17.1-13.8
Tires
Spare Tire Size
NA - TBD - NA
Front Tire Order Code
NA - TBD - N/A
Spare Tire Order Code
NA NA NA
Rear Tire Size
P225/45R17 P245/40R17 P265/45ZR18
Rear Tire Order Code
NA - TBD - N/A
Front Tire Size
P225/45R17 P225/45R17 P235/45ZR18
Trailering
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 -
Dead Weight Hitch - Max Tongue Wt. (lbs)
NA NA - TBD -
Weight Information
Base Curb Weight (lbs)
3307 3308 2888
Wheels
Rear Wheel Material
Aluminum Aluminum Aluminum
Rear Wheel Size (in)
17 x 8.0 17 x 8.5 18 x 9.0
Front Wheel Material
Aluminum Aluminum Aluminum
Spare Wheel Material
NA - TBD - NA
Front Wheel Size (in)
17 x 8.0 17 x 7.5 18 x 8.0
Spare Wheel Size (in)
NA - TBD - NA
Cooling System
Total Cooling System Capacity (qts)
8.700 - TBD - - TBD -
Electrical
Cold Cranking Amps @ 0° F (Primary)
- TBD - - TBD - - TBD -
Maximum Alternator Capacity (amps)
- TBD - - TBD - - TBD -
Engine
SAE Net Horsepower @ RPM
240 @ 5000 201 @ 5500 265 @ 6700
Engine Type
Turbocharged Gas I4 Gas I4 Gas Flat-6
Fuel System
Direct Injection Direct Injection Direct Injection
SAE Net Torque @ RPM
260 @ 1250 - 4800 229 @ 2000 - 4300 206 @ 4500-6500
Engine Order Code
NA NA NA
Displacement
2.0L/122 1.8L/110 2.7L/165
Mileage
EPA Fuel Economy Est - City (MPG)
22 22 20
Fuel Economy Est-Combined (MPG)
26 26 24
EPA Fuel Economy Est - Hwy (MPG)
34 32 30
Transmission
Drivetrain
Rear Wheel Drive Rear Wheel Drive Rear-Wheel Drive
Fifth Gear Ratio (:1)
0.810 1.00 - TBD -
Trans Description Cont. Again
NA NA NA
Reverse Ratio (:1)
3.350 4.06 - TBD -
Second Gear Ratio (:1)
2.060 2.61 - TBD -
Seventh Gear Ratio (:1)
NA NA NA
Trans Order Code
NA 411 480
Final Drive Axle Ratio (:1)
3.080 3.07 - TBD -
Fourth Gear Ratio (:1)
1.000 1.25 - TBD -
Trans Description Cont.
Manual Manual Manual
Sixth Gear Ratio (:1)
0.680 0.84 - TBD -
First Gear Ratio (:1)
3.680 4.46 - TBD -
Clutch Size (in)
- TBD - - TBD - - TBD -
Third Gear Ratio (:1)
1.310 1.72 - TBD -
Eighth Gear Ratio (:1)
NA - -
Trans Type
6 6 6
Summary
Body Style
Convertible 2 Door Roadster Convertible
Vehicle Name
BMW Z4 Mercedes-Benz SLK-Class Porsche Boxster
Suspension
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 -
Stabilizer Bar Diameter - Front (in)
NA NA - TBD -
Suspension Type - Rear
Independent Multi-Link Multi-Link
Emissions
Tons/yr of CO2 Emissions @ 15K mi/year
7.1 6.9 7.6
EPA Greenhouse Gas Score
7 7 - TBD -

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