BMW 6 Series vs. Porsche 911
iSeeCars' unbiased and data-driven comparison of the BMW 6 Series 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 6 Series and the Porsche 911.
When we compare the BMW 6 Series's and the Porsche 911's specifications and ratings, the BMW 6 Series has the advantage in the area of typical lower range of pricing for one- to five-year-old used cars. The Porsche 911 has the advantage in the area of base engine power. The BMW 6 Series and Porsche 911 have the same fuel efficiency. Based on this comparison of the BMW 6 Series's and the Porsche 911's specifications and ratings, the two cars are fairly comparable.
Pricing: A used 2018 BMW 6 Series ranges from $28,018 to $49,945 while a used 2018 Porsche 911 is priced between $83,537 to $169,999.
Engine Power and Fuel Efficiency Comparison: For engine performance, the BMW 6 Series’s base engine makes 315 horsepower, and the Porsche 911 base engine makes 370 horsepower. Both the 6 Series and the 911 are rated to deliver an average of 23 miles per gallon, with highway ranges of 537 and 490 miles respectively. Both models use premium unleaded.
New Car Pricing
Asking Price:
-
Starting MSRP:
86700
Category Avg Starting MSRP:
N/A
Category Starting MSRP Range:
N/A
New Car Pricing
Asking Price:
-
Starting MSRP:
103400
Category Avg Starting MSRP:
(Luxury Sports Cars)
91675
Category Starting MSRP Range:
(Luxury Sports Cars)
39950 - 453200
Used Car Pricing
Avg Used Car Price:
40079
Price Range:
28018 - 49945
Category Avg Price:
N/A
Category Avg Price Range:
N/A
# Used Cars for Sale Nationally:
44
Avg Mileage of Used Cars for Sale:
67015
# Good or Great Deals:
18
Used Car Pricing
Avg Used Car Price:
130504
Price Range:
83537 - 169999
Category Avg Price:
(Luxury Sports Cars)
67639
Category Avg Price Range:
(Luxury Sports Cars)
27289 - 200784
# Used Cars for Sale Nationally:
85
Avg Mileage of Used Cars for Sale:
25550
# Good or Great Deals:
14
BMW 6 Series Scores & Rankings
Overall Score:
Not available
Reliability:
Not available
Retained Value:
Not available
Safety:
Not available
Porsche 911 Scores & Rankings
Overall Score:
8.625755 / 10
Reliability:
8.5 / 10
Retained Value:
8.75151 / 10
Safety:
Not available
iSeeCars Reliability Insights for BMW 6 Series
Remaining Life Expectancy (years):
2.8
Typical Category Remaining Life Expectancy:
N/A
Category Remaining Life Expectancy Range:
N/A
Chance of Reaching 200k Miles for a New Car:
0.0
iSeeCars Reliability Insights for Porsche 911
Remaining Life Expectancy (years):
Typical Category Remaining Life Expectancy:
(Luxury Sports Cars)
6.9
Category Remaining Life Expectancy Range:
(Luxury Sports Cars)
2.7 - 11.2
Chance of Reaching 200k Miles for a New Car:
Expected 30-year Lifetime Recalls
Expected Lifetime Recalls:
5.009471131506527
Typical Category Recalls:
N/A
Category Range for Recalls:
N/A
Expected 30-year Lifetime Recalls
Expected Lifetime Recalls:
6.1408749580246695
Typical Category Recalls:
(Luxury Sports Cars)
1.6
Category Range for Recalls:
(Luxury Sports Cars)
0.6 - 7.0
BMW 6 Series Rankings
Not yet available
Porsche 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, Hatchback, Sedan
Available Body Styles
Convertible, Coupe
Available Drivetrain Options
Gasoline
Available Drivetrain Options
Gasoline
BMW 6 Series Trim Levels
640i, 640i xDrive, 650i, 650i xDrive, 640i xDrive Gran Turismo, 640i Gran Coupe, 640i xDrive Gran Coupe, 650i Gran Coupe, 650i xDrive Gran Coupe, ALPINA B6 xDrive Gran Coupe
Porsche 911 Trim Levels
Carrera, Carrera 4, Carrera 4 GTS, Carrera 4S, Carrera GTS, Carrera S, Targa 4, Targa 4 GTS, Targa 4S, Turbo, Turbo S, Carrera T, GT2 RS, GT3
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:
315 hp @ 5800 rpm
Torque:
330 foot-lbs @ 1300 rpm
Power-to-Weight Ratio (higher is better):
0.074 hp per pound
Base Drivetrain Specs
Horsepower:
370 hp @ 6500 rpm
Torque:
331 foot-lbs @ 1700 rpm
Power-to-Weight Ratio (higher is better):
0.112 hp per pound
Engine Specifications
Engine Size:
3 liters
Engine Configuration:
Inline
Number of Cylinders:
6
Transmission:
Automatic
Standard/Optional Drivetrain Type:
RWD / AWD
EPA Fuel Economy
(City/Highway/Combined MPG):
20 / 29 / 23
Range (city/hwy):
370 / 537 miles
Recommended Fuel Type:
Premium Unleaded
Engine Specifications
Engine Size:
3 liters
Engine Configuration:
Flat/Horizontally Opposed
Number of Cylinders:
6
Transmission:
Manual
Standard/Optional Drivetrain Type:
RWD / AWD
EPA Fuel Economy
(City/Highway/Combined MPG):
20 / 29 / 23
Range (city/hwy):
338 / 490 miles
Recommended Fuel Type:
Premium Unleaded
Standard/Optional Features
Alloy wheels:
Standard
Bluetooth:
Standard
Heated Seats
Standard
Keyless Entry:
Standard
Keyless Ignition:
Standard
Leather Upholstery:
Standard
Navigation System:
Standard
Paddle Shifters:
Standard
Parking Sensors:
Standard
Power outlet:
Standard
Quad Seats:
Standard
Roadside assistance:
Standard
Satellite radio:
Standard
Voice Recognition:
Standard
Wifi:
Standard
Wireless Smartphone Charging:
Standard
Adaptive Cruise Control:
Available
Apple CarPlay:
Available
Automatic Parking:
Available
Cooled/Ventilated Seats:
Available
Heated Steering Wheel:
Available
Air Suspension:
N/A
Android Auto:
N/A
Bench Seats:
N/A
Captain's seat:
N/A
Front Bench Seats:
N/A
Internet Radio:
N/A
Massage Seats:
N/A
Panoramic Sunroof/Moonroof
N/A
Power Lift Gate:
N/A
Roof Rack:
N/A
Sunroof/Moonroof:
N/A
Trailer Hitch:
N/A
Standard/Optional Features
Alloy wheels:
Standard
Bluetooth:
Standard
Heated Seats
Available
Keyless Entry:
Standard
Keyless Ignition:
Available
Leather Upholstery:
Standard
Navigation System:
Standard
Paddle Shifters:
Available
Parking Sensors:
Standard
Power outlet:
Standard
Quad Seats:
N/A
Roadside assistance:
N/A
Satellite radio:
Standard
Voice Recognition:
Standard
Wifi:
Standard
Wireless Smartphone Charging:
N/A
Adaptive Cruise Control:
Available
Apple CarPlay:
Standard
Automatic Parking:
N/A
Cooled/Ventilated Seats:
Available
Heated Steering Wheel:
Available
Air Suspension:
N/A
Android Auto:
N/A
Bench Seats:
Standard
Captain's seat:
N/A
Front Bench Seats:
N/A
Internet Radio:
N/A
Massage Seats:
N/A
Panoramic Sunroof/Moonroof
N/A
Power Lift Gate:
N/A
Roof Rack:
N/A
Sunroof/Moonroof:
N/A
Trailer Hitch:
N/A
Safety Features
Backup camera:
Standard
360-Degree Camera:
N/A
Blind Spot Monitoring:
N/A
Driver Attention Monitoring:
N/A
Forward Collision Warning:
N/A
Lane Departure Warning:
N/A
Lane Keeping Assist:
N/A
Pedestrian Detection:
N/A
Rear Cross-Traffic Alert:
N/A
Rear Seat Reminder:
N/A
Safety Features
Backup camera:
Standard
360-Degree Camera:
N/A
Blind Spot Monitoring:
N/A
Driver Attention Monitoring:
N/A
Forward Collision Warning:
N/A
Lane Departure Warning:
N/A
Lane Keeping Assist:
N/A
Pedestrian Detection:
N/A
Rear Cross-Traffic Alert:
N/A
Rear Seat Reminder:
N/A
Interior Dimensions
Front Head Room:
40.3 inches
Front Leg Room:
42.1 inches
Front Shoulder Room:
56.9 inches
Rear Head Room:
36.5 inches
Rear Leg Room:
30.5 inches
Rear Shoulder Room:
49.6 inches
Cargo Space:
10.6 cubic feet
Overall Interior Volume:
87.7 cubic feet
Interior Dimensions
Front Head Room:
38.4 inches
Front Leg Room:
41.6 inches
Front Shoulder Room:
51.5 inches
Rear Head Room:
Not yet available
Rear Leg Room:
Not yet available
Rear Shoulder Room:
Not yet available
Cargo Space:
5.1 cubic feet
Overall Interior Volume:
Not yet available
Exterior Dimensions
Curb Weight:
4250 lbs
Width:
82.3 inches
Height:
53.7 inches
Length:
192.6 inches
Wheelbase:
112.4 inches
Ground Clearance:
4.8 inches
Exterior Dimensions
Curb Weight:
3307 lbs
Width:
77.9 inches
Height:
50.7 inches
Length:
177.1 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:
245/45R18
Standard Wheel/Tire Information
Wheel Size:
19.0 x 8.5 inches
Wheel Type:
aluminum alloy
Tire Size:
235/40ZR19
Exterior Colors
Black
Black Sapphire Metallic / Carbon Black Metallic / Citrin Black Metallic / Jet Black / Ruby Black Metallic
Blue
Mediterranean Blue Metallic / Sonic Speed Blue Metallic / Tanzanite Blue Metallic
Brown
Frozen Bronze Metallic / Jatoba Brown Metallic
Gray
Moonstone Metallic / Space Gray Metallic
Red
Melbourne Red Metallic
Silver
Glacier Silver Metallic
White
Alpine White / Frozen Brilliant White Metallic / Mineral White Metallic
Orange
Not available
Yellow
Not available
Exterior Colors
Black
Black / Jet Black Metallic
Blue
Miami Blue Metallic / Night Blue Metallic / Sapphire Blue Metallic
Brown
Not available
Gray
Agate Grey Metallic / Chalk Metallic / Graphite Blue Metallic
Red
Carmine Red Metallic / Guards Red
Silver
GT Silver Metallic / Rhodium Silver Metallic
White
Carrara White Metallic / White
Orange
Lava Orange Metallic
Yellow
Racing Yellow
Interior Colors
Beige
Champagne / Cognac/Black
Black
Black
Brown
Amaro Brown / Canyon Brown / Cinnamon Brown
Gray
Ivory White / Ivory White/Black / Platinum/Black
Red
Vermilion Red
White
Opal White
Blue
Not available
Interior Colors
Beige
Not available
Black
Black / Black/Bordeaux Red / Black/Dark Silver / Black/Luxor Beige
Brown
Espresso / Espresso/Cognac / Saddle Brown
Gray
Agate Grey / Graphite Blue / Graphite Blue/Chalk
Red
Bordeaux Red
White
Not available
Blue
Graphite Blue/Chalk
