Find a Car

Add a Vehicle to Compare

Change a Vehicle to Compare

Compare 2015 Porsche Boxster vs 2015 BMW Z4

2015 Porsche Boxster Change
2015 BMW Z4 Change
+ Add a Car
Selected Style 2-Door Roadster
Switch Style

Body Style


Style MPG City MPG Hwy Invoice MSRP
2-Door Roadster 20 30 N/A $51,400
2-Door Roadster S 20 28 N/A $63,300
2-Door Roadster GTS 19 26 N/A $73,500
2-Door Roadster sDrive28i
Switch Style

Body Style


Style MPG City MPG Hwy Invoice MSRP
2-Door Roadster sDrive28i 22 34 $45,535 $48,950
2-Door Roadster sDrive35i 17 24 $52,895 $56,950
2-Door Roadster sDrive35is 17 24 $61,035 $65,800
Invoice Price
Manufacturer Suggested Retail Price
Monthly Payment Estimate
$857 / month
$816 / month
Dealer Price Quotes
The Car Connection's Take
TCC Rating
/ 10
TCC Rating
How does the
TCC Rating work?
The TCC Rating is a clear numeric rating value based on a 10-point scale that reflects the overall opinion of our automotive experts on any vehicle and rolls up ratings we give each vehicle across sub-categories you care about like performance, safety, styling and more.

Our rating also has simple color-coded “Stop” (red), “Caution” (orange),
or “Go” (green) messages along with the numerical score so you can easily understand where we stand at a glance.

Our automotive experts then also collect and show you what other websites say about these different aspects of any vehicle. We do this leg work for you to simplify your research process.

Learn more about how we rate and review cars here.

Read Our Full Review
/ 10
TCC Rating
Read Our Full Review
TCC’s Bottom Line The 2015 Porsche Boxster is a relative performance bargain, combining everyday usability with a balanced chassis and sweet engines. The 2015 BMW Z4 is on the pricier side of the roadster segment, but it offers a nice blend of comfort, sport, and technology.
TCC Likes
TCC Dislikes
Fuel Economy
Fuel Economy - City 20 mpg 22 mpg
Fuel Economy - Highway 30 mpg 34 mpg
EPA Classification Two-Seaters Two-Seaters
Interior Dimensions
Front Head Room (in) 38.6 39.1
Passenger Capacity 2 2
Front Shoulder Room (in) 51.7 53.3
Front Leg Room (in) 42.6 42.2
Front Hip Room (in) 53.4 -
Exterior Dimensions
Min Ground Clearance (in) 4.3 -
Length, Overall (in) 172.2 166.9
Height, Overall (in) 50.5 50.8
Track Width, Rear (in) 60.5 61.4
Wheelbase (in) 97.4 98.3
Width, Max w/o mirrors (in) 70.9 70.5
Track Width, Front (in) 60.1 59.5
Cargo Area Dimensions
Trunk Volume (ft³) 9.9 8
Rear Drum Diam x Width (in) NA NA
Disc - Front (Yes or ) Yes Yes
Front Brake Rotor Diam x Thickness (in) 12.4 13
Drum - Rear (Yes or ) NA NA
Brake ABS System 4-Wheel 4-Wheel
Disc - Rear (Yes or ) Yes Yes
Rear Brake Rotor Diam x Thickness (in) 11.8 11.8
Fuel Tank
Fuel Tank Capacity, Approx (gal) 16.9 14.5
Steering Type Rack-Pinion Rack-Pinion
Turning Diameter - Curb to Curb (ft) 36.4 35.1
Spare Tire Size NA NA
Front Tire Order Code NA NA
Spare Tire Order Code NA NA
Rear Tire Size P265/45ZR18 P225/45VR17
Rear Tire Order Code NA NA
Front Tire Size P235/45ZR18 P225/45VR17
Weight Information
Base Curb Weight (lbs) 2888 3263
Rear Wheel Material Aluminum Aluminum
Rear Wheel Size (in) 18 X 9 17 X 8
Front Wheel Material Aluminum Aluminum
Spare Wheel Material NA NA
Front Wheel Size (in) 18 X 8 17 X 8
Spare Wheel Size (in) NA NA
Maximum Alternator Capacity (amps) 120 170
Cold Cranking Amps @ 0° F (Primary) 340 -
Fuel System Gasoline Direct Injection Gasoline Direct Injection
SAE Net Torque @ RPM 206 @ 4400 260 @ 1450
Engine Order Code NA NA
Displacement 2.7 L/165 2.0 L/122
SAE Net Horsepower @ RPM 265 @ 6700 240 @ 5000
Engine Type Premium Unleaded H-6 Intercooled Turbo Premium Unleaded I-4
EPA Fuel Economy Est - City (MPG) 20 22
Fuel Economy Est-Combined (MPG) 24 26
EPA Fuel Economy Est - Hwy (MPG) 30 34
Fourth Gear Ratio (:1) 1.13 1.00
Trans Description Cont. Manual w/OD Manual w/OD
Drivetrain Rear Wheel Drive Rear Wheel Drive
Sixth Gear Ratio (:1) 0.84 0.68
First Gear Ratio (:1) 3.67 3.68
Seventh Gear Ratio (:1) NA NA
Final Drive Axle Ratio (:1) 3.89 3.08
Third Gear Ratio (:1) 1.46 1.31
Trans Type 6 6
Fifth Gear Ratio (:1) 0.97 0.81
Trans Description Cont. Again NA NA
Reverse Ratio (:1) 3.33 3.35
Second Gear Ratio (:1) 2.05 2.06
Trans Order Code NA ZMT
Body Style Convertible Roadster
Vehicle Name Porsche Boxster BMW Z4
Suspension Type - Rear Strut Multi-Link
Suspension Type - Rear (Cont.) Strut Multi-Link
Suspension Type - Front Strut Strut
Suspension Type - Front (Cont.) Strut Strut
Tons/yr of CO2 Emissions @ 15K mi/year 7.4 6.8
© 2016 The Car Connection. All Rights Reserved. The Car Connection is published by Internet Brands Automotive Group. Stock photography by izmostock. Read our Cookie Policy.