BMW Z4 vs. Porsche 911
iSeeCars' unbiased and data-driven comparison of the BMW Z4 and Porsche 911 contrasts the two cars across a broad spectrum of vehicle specifications to determine which car is better. In addition to comparing pricing and specs, iSeeCars uses all the ratings, rankings, and insights from its comprehensive analyses of each vehicle model, including calculations of reliability, safety, depreciation, value retention, and the vehicle's projected lifetime recalls (based on analyzing over 25 billion data points). This in-depth evaluation is used to identify which vehicle represents a better overall choice for shoppers who are considering both the BMW Z4 and the Porsche 911.
In comparing the BMW Z4's and the Porsche 911's specifications and ratings, the BMW Z4 has the advantage in the area of new vehicle base pricing. The Porsche 911 has the advantage in the areas of reliability, resale value, overall quality score and base engine power. Based on this comparison of the BMW Z4's and the Porsche 911's specifications and ratings, the Porsche 911 is a better car than the BMW Z4.
Pricing: For a new model, the BMW Z4's price is between $61,458 and $78,576, with the Porsche 911 priced between $151,403 and $295,122.
Resale/Retained Value: Looking at the 5-year depreciation rate for both models, the BMW Z4 loses 48.5 percent of its value and the Porsche 911 loses 26.3 percent of its value. This means the Porsche 911 retains 22.2 percentage points more of its value and has the advantage of higher resale value versus the BMW Z4.
Quality Rating: The iSeeCars Overall Quality rating for the BMW Z4 is 7.8 out of 10 while the Porsche 911's quality rating is 9.1 out of 10. This results in the BMW Z4 being ranked 9 out of 40 Best Luxury Sports Cars and the Porsche 911 being ranked 1 out of 40. Out of 25 Best Luxury Convertibles, the BMW Z4 is ranked 9 and the Porsche 911 is ranked 1.
Reliability Rating: iSeeCars’ Reliability Rating for the BMW Z4 is 7.6 out of 10. For the Porsche 911 the reliability rating is 8.7 out of 10. This gives the Porsche 911 an advantage in reliability compared to the BMW Z4.
Engine Power and Fuel Efficiency Comparison: For engine performance, the BMW Z4’s base engine makes 255 horsepower, and the Porsche 911 base engine makes 388 horsepower.
New Car Pricing
Asking Price:
61458 - 78576
Starting MSRP:
56100
Category Avg Starting MSRP:
(Luxury Sports Cars)
87986
Category Starting MSRP Range:
(Luxury Sports Cars)
56100 - 224900
New Car Pricing
Asking Price:
151403 - 295122
Starting MSRP:
133400
Category Avg Starting MSRP:
(Luxury Sports Cars)
90928
Category Starting MSRP Range:
(Luxury Sports Cars)
54500 - 150000
Used Car Pricing
Avg Used Car Price:
Price Range:
-
Category Avg Price:
(Luxury Sports Cars)
67227
Category Avg Price Range:
(Luxury Sports Cars)
67227 - 67227
# Used Cars for Sale Nationally:
Avg Mileage of Used Cars for Sale:
# Good or Great Deals:
Used Car Pricing
Avg Used Car Price:
202716
Price Range:
156343 - 342749
Category Avg Price:
(Luxury Sports Cars)
121269
Category Avg Price Range:
(Luxury Sports Cars)
60394 - 258844
# Used Cars for Sale Nationally:
Avg Mileage of Used Cars for Sale:
# Good or Great Deals:
5-year Depreciation
Depreciation $:
27312
Depreciation %:
0.48684698
Resale Value $:
28788
Residual Value %:
0.5131530200000001
Typical Category Depreciation %:
(Luxury Sports Cars)
0.32185613
Category Depreciation Range:
(Luxury Sports Cars)
0.25230078 - 0.50263852
5-year Depreciation
Depreciation $:
35723
Depreciation %:
0.26779135
Resale Value $:
97677
Residual Value %:
0.73220865
Typical Category Depreciation %:
(Luxury Sports Cars)
0.27961642
Category Depreciation Range:
(Luxury Sports Cars)
0.17060832 - 0.55051463
BMW Z4 Scores & Rankings
Overall Score:
7.8 / 10
Reliability:
7.6 / 10
Retained Value:
7.9 / 10
Safety:
Not available
Porsche 911 Scores & Rankings
Overall Score:
9.1 / 10
Reliability:
8.7 / 10
Retained Value:
9.4 / 10
Safety:
Not available
iSeeCars Reliability Insights for BMW Z4
Avg Life Expectancy (years):
13.0
Typical Category Life Expectancy:
(Luxury Sports Cars)
19.2
Category Life Expectancy Range:
(Luxury Sports Cars)
13.0 - 29.7
Chance of Reaching 200k Miles for a New Car:
0.001
iSeeCars Reliability Insights for Porsche 911
Avg Life Expectancy (years):
29.5
Typical Category Life Expectancy:
(Luxury Sports Cars)
20.2
Category Life Expectancy Range:
(Luxury Sports Cars)
13.0 - 29.7
Chance of Reaching 200k Miles for a New Car:
0.0
Expected 30-year Lifetime Recalls
Expected Lifetime Recalls:
Typical Category Recalls:
N/A
Category Range for Recalls:
N/A
Expected 30-year Lifetime Recalls
Expected Lifetime Recalls:
7.16068364821227
Typical Category Recalls:
(Luxury Sports Cars)
3.9
Category Range for Recalls:
(Luxury Sports Cars)
0.9 - 7.2
BMW Z4 Rankings
Ranking
1 out of / 29Ranking
1 out of / 16Ranking
1 out of / 6Ranking
3 out of / 8Ranking
3 out of / 6Ranking
3 out of / 5Ranking
3 out of / 5Ranking
3 out of / 4Ranking
5 out of / 40Ranking
5 out of / 25Ranking
5 out of / 25Ranking
7 out of / 40Ranking
7 out of / 40Ranking
9 out of / 40Ranking
9 out of / 25Ranking
9 out of / 25Ranking
16 out of / 25Ranking
20 out of / 25Ranking
33 out of / 40Ranking
34 out of / 40Porsche 911 Rankings
Ranking
1 out of / 40Ranking
1 out of / 25Ranking
1 out of / 25Ranking
1 out of / 8Ranking
1 out of / 4Ranking
2 out of / 40Ranking
2 out of / 25Ranking
2 out of / 25Ranking
4 out of / 40Ranking
4 out of / 40Ranking
13 out of / 16Ranking
23 out of / 29Available Body Styles
Convertible
Available Body Styles
Convertible, Coupe
Available Drivetrain Options
Gasoline
Available Drivetrain Options
Gasoline, Hybrid
BMW Z4 Trim Levels
M40i, sDrive30i
Porsche 911 Trim Levels
Not yet available
Warranty Information
Warranty, Bumper-to-Bumper:
4 years / 50000 miles
Warranty, Powertrain:
4 years / 50000 miles
Warranty, Roadside Assistance:
4 years
Warranty Information
Warranty, Bumper-to-Bumper:
4 years / 50000 miles
Warranty, Powertrain:
4 years / 50000 miles
Warranty, Roadside Assistance:
4 years / 50000 miles
Safety Ratings
NHTSA Safety Rating (last 5 year average):
Not yet available
2025 NHTSA Overall Rating:
Not yet available
2025 NHTSA Front Crash Overall Rating:
Not yet available
2025 NHTSA Side Crash Overall Rating:
Not yet available
2025 NHTSA Rollover Rating:
Not yet available
IIHS Safety Rating:
Not yet available
Safety Ratings
NHTSA Safety Rating (last 5 year average):
Not yet available
2025 NHTSA Overall Rating:
Not yet available
2025 NHTSA Front Crash Overall Rating:
Not yet available
2025 NHTSA Side Crash Overall Rating:
Not yet available
2025 NHTSA Rollover Rating:
Not yet available
IIHS Safety Rating:
Not yet available
Base Drivetrain Specs
Horsepower:
255 hp @ 5000 rpm
Torque:
295 foot-lbs @ 1550 rpm
Power-to-Weight Ratio (higher is better):
0.077 hp per pound
Base Drivetrain Specs
Horsepower:
388 hp @ 6500 rpm
Torque:
331 foot-lbs @ 2000 rpm
Power-to-Weight Ratio (higher is better):
0.110 hp per pound
Engine Specifications
Engine Size:
2 liters
Engine Configuration:
Inline
Number of Cylinders:
4
Transmission:
Automatic
Standard/Optional Drivetrain Type:
RWD
EPA Fuel Economy
(City/Highway/Combined MPG):
Not yet available
Range (city/hwy):
Not yet available
Recommended Fuel Type:
Not yet available
Engine Specifications
Engine Size:
3 liters
Engine Configuration:
Flat/Horizontally Opposed
Number of Cylinders:
6
Transmission:
Automatic
Standard/Optional Drivetrain Type:
RWD / AWD
EPA Fuel Economy
(City/Highway/Combined MPG):
18 / 25 / 21
Range (city/hwy):
299 / 415 miles
Recommended Fuel Type:
Premium Unleaded
Standard/Optional Features
Alloy wheels:
Standard
Android Auto:
Standard
Apple CarPlay:
Standard
Bluetooth:
Standard
Heated Seats
Standard
Internet Radio:
Standard
Keyless Entry:
Standard
Keyless Ignition:
Standard
Leather Upholstery:
Standard
Navigation System:
Standard
Paddle Shifters:
Standard
Power outlet:
Standard
Roadside assistance:
Standard
Satellite radio:
Standard
Voice Recognition:
Standard
Wireless Smartphone Charging:
Standard
Adaptive Cruise Control:
Available
Automatic Parking:
Available
Heated Steering Wheel:
Available
Parking Sensors:
Available
Air Suspension:
N/A
Bench Seats:
N/A
Captain's seat:
N/A
Cooled/Ventilated Seats:
N/A
Front Bench Seats:
N/A
Massage Seats:
N/A
Panoramic Sunroof/Moonroof
N/A
Power Lift Gate:
N/A
Quad Seats:
N/A
Roof Rack:
N/A
Sunroof/Moonroof:
N/A
Trailer Hitch:
N/A
Wifi:
N/A
Standard/Optional Features
Alloy wheels:
Standard
Android Auto:
Standard
Apple CarPlay:
Standard
Bluetooth:
Standard
Heated Seats
Standard
Internet Radio:
Standard
Keyless Entry:
Standard
Keyless Ignition:
Standard
Leather Upholstery:
Standard
Navigation System:
Standard
Paddle Shifters:
Standard
Power outlet:
Standard
Roadside assistance:
Standard
Satellite radio:
Standard
Voice Recognition:
Standard
Wireless Smartphone Charging:
Standard
Adaptive Cruise Control:
Available
Automatic Parking:
Available
Heated Steering Wheel:
Standard
Parking Sensors:
Standard
Air Suspension:
N/A
Bench Seats:
Standard
Captain's seat:
N/A
Cooled/Ventilated Seats:
Available
Front Bench Seats:
N/A
Massage Seats:
N/A
Panoramic Sunroof/Moonroof
N/A
Power Lift Gate:
Standard
Quad Seats:
N/A
Roof Rack:
N/A
Sunroof/Moonroof:
N/A
Trailer Hitch:
N/A
Wifi:
Standard
Safety Features
Backup camera:
Standard
Driver Attention Monitoring:
Standard
Forward Collision Warning:
Standard
Pedestrian Detection:
Standard
360-Degree Camera:
N/A
Blind Spot Monitoring:
N/A
Lane Departure Warning:
N/A
Lane Keeping Assist:
N/A
Rear Cross-Traffic Alert:
N/A
Rear Seat Reminder:
N/A
Safety Features
Backup camera:
Standard
Driver Attention Monitoring:
Standard
Forward Collision Warning:
Standard
Pedestrian Detection:
Standard
360-Degree Camera:
N/A
Blind Spot Monitoring:
N/A
Lane Departure Warning:
Standard
Lane Keeping Assist:
Standard
Rear Cross-Traffic Alert:
N/A
Rear Seat Reminder:
N/A
Interior Dimensions
Front Head Room:
38.9 inches
Front Leg Room:
42.2 inches
Front Shoulder Room:
54.3 inches
Rear Head Room:
Not yet available
Rear Leg Room:
Not yet available
Rear Shoulder Room:
Not yet available
Cargo Space:
9.9 cubic feet
Overall Interior Volume:
Not yet available
Interior Dimensions
Front Head Room:
Not yet available
Front Leg Room:
Not yet available
Front Shoulder Room:
Not yet available
Rear Head Room:
Not yet available
Rear Leg Room:
Not yet available
Rear Shoulder Room:
Not yet available
Cargo Space:
4.8 cubic feet
Overall Interior Volume:
Not yet available
Exterior Dimensions
Curb Weight:
3314 lbs
Width:
79.7 inches
Height:
51.4 inches
Length:
170.7 inches
Wheelbase:
97.2 inches
Ground Clearance:
4.7 inches
Exterior Dimensions
Curb Weight:
3525 lbs
Width:
80 inches
Height:
51.2 inches
Length:
178.8 inches
Wheelbase:
96.5 inches
Ground Clearance:
4.6 inches
Standard Wheel/Tire Information
Wheel Size:
18.0 x 8.0 inches
Wheel Type:
aluminum alloy
Tire Size:
225/45R18
Standard Wheel/Tire Information
Wheel Size:
19.0 x 8.5 inches
Wheel Type:
painted aluminum alloy
Tire Size:
235/40ZR19
Exterior Colors
Black
Black Sapphire Metallic
Blue
Portimao Blue Metallic
Gray
Skyscraper Grey Metallic
Purple
Thundernight Metallic
Red
San Francisco Red Metallic
White
Alpine White
Green
Not available
Silver
Not available
Yellow
Not available
Exterior Colors
Black
Black / Jet Black Metallic
Blue
Gentian Blue Metallic / Lugano Blue
Gray
Chalk / Ice Grey Metallic / Slate Grey Neo
Purple
Not available
Red
Carmine Red / Guards Red
White
White
Green
Shade Green Metallic / Vanadium Grey Metallic
Silver
GT Silver Metallic
Yellow
Cartagena Yellow Metallic
Interior Colors
Black
Black / Black w/ Blue Contrast Stitching
Brown
Cognac w/ Contrast Stitching
Red
Magma Red w/ Black Contrast Stitching
White
Ivory White w/ Contrast Stitching
Beige
Not available
Blue
Not available
Gray
Not available
Interior Colors
Black
Basalt Black / Black / Black w/ Chalk Stitching / Black/Choice of Color / Black/Limestone Beige
Brown
Basalt Black/Classic Cognac / Truffle Brown
Red
Black/Bordeaux Red / Bordeaux Red / Bordeaux Red w/ Chalk Stitching / Bordeaux Red/Choice of Color
White
Not available
Beige
Black/Limestone Beige
Blue
Dark Night Blue / Dark Night Blue w/ Chalk Stitching [Leather] / Graphite Blue/Choice of Color
Gray
Dark Night Blue/Chalk / Slate Grey/Chalk / Slate Grey/Choice of Color
