BMW 4 Series vs. Audi A6
iSeeCars' unbiased and data-driven comparison of the BMW 4 Series and Audi A6 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 4 Series and the Audi A6.
When we compare the BMW 4 Series's and the Audi A6's specifications and ratings, the BMW 4 Series has the advantage in the areas of new vehicle base pricing, typical lower range of pricing for one- to five-year-old used cars, and fuel efficiency and resale value. The Audi A6 has the advantage in the areas of reliability, interior volume, overall quality score and base engine power. Based on this comparison of the BMW 4 Series's and the Audi A6's specifications and ratings, the two cars are fairly comparable.
Pricing: A used 2025 BMW 4 Series ranges from $39,997 to $64,584 while a used 2025 Audi A6 is priced between $47,998 to $71,140. For a new model, the BMW 4 Series's price is between $53,254 and $74,216, with the Audi A6 priced between $59,135 and $78,929.
Resale/Retained Value: Looking at the 5-year depreciation rate for both models, the BMW 4 Series loses 57 percent of its value and the Audi A6 loses 60.9 percent of its value. This means the BMW 4 Series retains 3.9 percentage points more of its value and has the advantage of higher resale value versus the Audi A6.
Quality Rating: The iSeeCars Overall Quality rating for the BMW 4 Series is 7.4 out of 10 while the Audi A6's quality rating is 7.5 out of 10. This results in the BMW 4 Series being ranked 19 out of 36 Best Luxury Small Cars and the Audi A6 being ranked 9 out of 24 Best Luxury Midsize Cars.
Reliability Rating: iSeeCars’ Reliability Rating for the BMW 4 Series is 7.4 out of 10. For the Audi A6 the reliability rating is 7.5 out of 10. This gives the Audi A6 a slight advantage in reliability compared to the BMW 4 Series.
Engine Power and Fuel Efficiency Comparison: For engine performance, the BMW 4 Series’s base engine makes 255 horsepower, and the Audi A6 base engine makes 261 horsepower. The 4 Series is rated to deliver an average of 30 miles per gallon, with a highway range of 546 miles. The A6 is rated to deliver an average of 26 miles per gallon, with a highway range of 598 miles.This gives the BMW 4 Series the advantage in fuel efficiency and the Audi A6 the advantage in maximum range. Both models use premium unleaded.
Passenger Space Comparison: The Audi A6, a midsize car, has the advantage of offering more interior volume, reflected in more front shoulder room, rear head room, rear shoulder room and rear leg room. The BMW 4 Series, a compact car, has the advantage in the areas of front head room, front leg room and cargo space.
Safety Ratings: The Audi A6 has an average safety rating of 5 out of 5 Stars based on NHTSA's crash test ratings.
New Car Pricing
Asking Price:
53254 - 74216
Starting MSRP:
49650
Category Avg Starting MSRP:
(Luxury Compact Cars)
49451
Category Starting MSRP Range:
(Luxury Compact Cars)
33000 - 79900
New Car Pricing
Asking Price:
59135 - 78929
Starting MSRP:
58100
Category Avg Starting MSRP:
(Luxury Midsize Cars)
79467
Category Starting MSRP Range:
(Luxury Midsize Cars)
42140 - 200195
Used Car Pricing
Avg Used Car Price:
51265
Price Range:
39997 - 64584
Category Avg Price:
(Luxury Compact Cars)
51959
Category Avg Price Range:
(Luxury Compact Cars)
34107 - 95081
# Used Cars for Sale Nationally:
440
Avg Mileage of Used Cars for Sale:
8796
# Good or Great Deals:
117
Used Car Pricing
Avg Used Car Price:
58757
Price Range:
47998 - 71140
Category Avg Price:
(Luxury Midsize Cars)
80683
Category Avg Price Range:
(Luxury Midsize Cars)
43661 - 144992
# Used Cars for Sale Nationally:
Avg Mileage of Used Cars for Sale:
# Good or Great Deals:
5-year Depreciation
Depreciation $:
Depreciation %:
Resale Value $:
Typical Category Depreciation %:
(Luxury Compact Cars)
0.51356376
Category Depreciation Range:
(Luxury Compact Cars)
0.34749831 - 0.55942423
5-year Depreciation
Depreciation $:
35532
Depreciation %:
0.61156182
Resale Value $:
22568
Typical Category Depreciation %:
(Luxury Midsize Cars)
0.49394848
Category Depreciation Range:
(Luxury Midsize Cars)
0.39819597 - 0.61156182
BMW 4 Series Scores & Rankings
Overall Score:
7.4 / 10
Reliability:
7.4 / 10
Retained Value:
7.3 / 10
Safety:
Not available
Audi A6 Scores & Rankings
Overall Score:
7.5 / 10
Reliability:
7.5 / 10
Retained Value:
7.1 / 10
Safety:
8.0 / 10
iSeeCars Reliability Insights for BMW 4 Series
Avg Life Expectancy (years):
10.5
Typical Category Life Expectancy:
(Luxury Compact Cars)
11.0
Category Life Expectancy Range:
(Luxury Compact Cars)
9.5 - 20.1
Chance of Reaching 200k Miles for a New Car:
0.024
iSeeCars Reliability Insights for Audi A6
Avg Life Expectancy (years):
10.7
Typical Category Life Expectancy:
(Luxury Midsize Cars)
13.2
Category Life Expectancy Range:
(Luxury Midsize Cars)
9.4 - 22.1
Chance of Reaching 200k Miles for a New Car:
0.045
Expected 30-year Lifetime Recalls
Expected Lifetime Recalls:
6.7878581479890014
Typical Category Recalls:
(Luxury Compact Cars)
2.2
Category Range for Recalls:
(Luxury Compact Cars)
1.5 - 10.4
Expected 30-year Lifetime Recalls
Expected Lifetime Recalls:
1.9696536471404869
Typical Category Recalls:
(Luxury Midsize Cars)
3.0
Category Range for Recalls:
(Luxury Midsize Cars)
1.5 - 35.8
BMW 4 Series Rankings
Ranking
1 out of / 36Ranking
3 out of / 6Ranking
3 out of / 6Ranking
12 out of / 36Ranking
13 out of / 36Ranking
17 out of / 36Ranking
18 out of / 36Ranking
19 out of / 36Ranking
23 out of / 36Ranking
23 out of / 32Ranking
36 out of / 36Audi A6 Rankings
Ranking
2 out of / 6Ranking
2 out of / 6Ranking
5 out of / 24Ranking
6 out of / 18Ranking
8 out of / 24Ranking
8 out of / 18Ranking
9 out of / 24Ranking
9 out of / 24Ranking
13 out of / 24Ranking
14 out of / 24Ranking
17 out of / 24Ranking
22 out of / 24Available Body Styles
Convertible, Coupe, Sedan
Available Body Styles
Sedan
Available Drivetrain Options
Gasoline
Available Drivetrain Options
Gasoline
BMW 4 Series Trim Levels
430i, 430i Gran Coupe, 430i xDrive, 430i xDrive Gran Coupe, M440i, M440i Gran Coupe, M440i xDrive, M440i xDrive Gran Coupe
Audi A6 Trim Levels
quattro Premium 45 TFSI, quattro Premium 55 TFSI, quattro Premium Plus 45 TFSI, quattro Premium Plus 55 TFSI, quattro Prestige 55 TFSI
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
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):
5 out of 5 Stars
2025 NHTSA Overall Rating:
5 out of 5 Stars
2025 NHTSA Front Crash Overall Rating:
4 out of 5 Stars
2025 NHTSA Side Crash Overall Rating:
5 out of 5 Stars
2025 NHTSA Rollover Rating:
5 out of 5 Stars
IIHS Safety Rating:
Not yet available
Base Drivetrain Specs
Horsepower:
255 hp @ 4700 rpm
Torque:
295 foot-lbs @ 1600 rpm
Power-to-Weight Ratio (higher is better):
0.065 hp per pound
Base Drivetrain Specs
Horsepower:
261 hp @ 5000 rpm
Torque:
273 foot-lbs @ 1600 rpm
Power-to-Weight Ratio (higher is better):
0.064 hp per pound
Engine Specifications
Engine Size:
2 liters
Engine Configuration:
Inline
Number of Cylinders:
4
Transmission:
Automatic
Standard/Optional Drivetrain Type:
RWD / AWD
EPA Fuel Economy
(City/Highway/Combined MPG):
27 / 35 / 30
Range (city/hwy):
421 / 546 miles
Recommended Fuel Type:
Premium Unleaded
Engine Specifications
Engine Size:
2 liters
Engine Configuration:
Inline
Number of Cylinders:
4
Transmission:
Automatic
Standard/Optional Drivetrain Type:
AWD
EPA Fuel Economy
(City/Highway/Combined MPG):
24 / 31 / 26
Range (city/hwy):
463 / 598 miles
Recommended Fuel Type:
Premium Unleaded
Standard/Optional Features
Alloy wheels:
Standard
Android Auto:
Standard
Apple CarPlay:
Standard
Bench Seats:
Standard
Bluetooth:
Standard
Heated Seats
Standard
Internet Radio:
Standard
Keyless Entry:
Standard
Keyless Ignition:
Standard
Leather Upholstery:
Standard
Navigation System:
Standard
Paddle Shifters:
Standard
Parking Sensors:
Standard
Power Lift Gate:
Standard
Power outlet:
Standard
Roadside assistance:
Standard
Satellite radio:
Standard
Sunroof/Moonroof:
Standard
Voice Recognition:
Standard
Wifi:
Standard
Wireless Smartphone Charging:
Standard
Adaptive Cruise Control:
Available
Automatic Parking:
Available
Cooled/Ventilated Seats:
Available
Heated Steering Wheel:
Available
Air Suspension:
N/A
Captain's seat:
N/A
Front Bench Seats:
N/A
Massage Seats:
N/A
Panoramic Sunroof/Moonroof
N/A
Quad Seats:
N/A
Roof Rack:
N/A
Trailer Hitch:
N/A
Standard/Optional Features
Alloy wheels:
Standard
Android Auto:
Standard
Apple CarPlay:
Standard
Bench Seats:
Standard
Bluetooth:
Standard
Heated Seats
Standard
Internet Radio:
Standard
Keyless Entry:
Standard
Keyless Ignition:
Standard
Leather Upholstery:
Standard
Navigation System:
Standard
Paddle Shifters:
Standard
Parking Sensors:
Standard
Power Lift Gate:
Standard
Power outlet:
Standard
Roadside assistance:
Standard
Satellite radio:
Standard
Sunroof/Moonroof:
Standard
Voice Recognition:
Standard
Wifi:
Standard
Wireless Smartphone Charging:
Available
Adaptive Cruise Control:
Available
Automatic Parking:
Available
Cooled/Ventilated Seats:
Available
Heated Steering Wheel:
Available
Air Suspension:
N/A
Captain's seat:
N/A
Front Bench Seats:
N/A
Massage Seats:
Available
Panoramic Sunroof/Moonroof
N/A
Quad Seats:
N/A
Roof Rack:
N/A
Trailer Hitch:
N/A
Safety Features
Backup camera:
Standard
Blind Spot Monitoring:
Standard
Driver Attention Monitoring:
Standard
Forward Collision Warning:
Standard
Lane Departure Warning:
Standard
Pedestrian Detection:
Standard
Rear Cross-Traffic Alert:
Standard
Rear Seat Reminder:
Standard
360-Degree Camera:
N/A
Lane Keeping Assist:
N/A
Safety Features
Backup camera:
Standard
Blind Spot Monitoring:
Available
Driver Attention Monitoring:
Standard
Forward Collision Warning:
Standard
Lane Departure Warning:
Standard
Pedestrian Detection:
Standard
Rear Cross-Traffic Alert:
Available
Rear Seat Reminder:
N/A
360-Degree Camera:
Available
Lane Keeping Assist:
Standard
Interior Dimensions
Front Head Room:
38.6 inches
Front Leg Room:
41.5 inches
Front Shoulder Room:
55.2 inches
Rear Head Room:
36.6 inches
Rear Leg Room:
34.9 inches
Rear Shoulder Room:
54.3 inches
Cargo Space:
16.6 cubic feet
Overall Interior Volume:
91.0 cubic feet
Interior Dimensions
Front Head Room:
38 inches
Front Leg Room:
41.3 inches
Front Shoulder Room:
57.8 inches
Rear Head Room:
38.1 inches
Rear Leg Room:
37.4 inches
Rear Shoulder Room:
56.5 inches
Cargo Space:
13.7 cubic feet
Overall Interior Volume:
99.0 cubic feet
Exterior Dimensions
Curb Weight:
3898 lbs
Width:
81.6 inches
Height:
56.8 inches
Length:
188.5 inches
Wheelbase:
112.4 inches
Ground Clearance:
5.5 inches
Exterior Dimensions
Curb Weight:
4101 lbs
Width:
83.1 inches
Height:
57.4 inches
Length:
194.4 inches
Wheelbase:
115.1 inches
Ground Clearance:
4.2 inches
Standard Wheel/Tire Information
Wheel Size:
18.0 x 8.5 inches
Wheel Type:
painted aluminum alloy
Tire Size:
245/45R18
Standard Wheel/Tire Information
Wheel Size:
19.0 x 8.5 inches
Wheel Type:
aluminum alloy
Tire Size:
245/45R19
Exterior Colors
Black
Black Sapphire Metallic / Jet Black
Blue
Frozen Portimao Blue Metallic / Portimao Blue Metallic / Tanzanite Blue II Metallic
Gray
Brooklyn Grey Metallic / Dravit Grey Metallic / Frozen Pure Grey II Metallic / Skyscraper Grey Metallic
Green
Cape York Green Metallic
Red
Vegas Red Metallic
White
Alpine White / Mineral White Metallic
Brown
Not available
Silver
Not available
Exterior Colors
Black
Brilliant Black / Mythos Black Metallic
Blue
Firmament Blue Metallic
Gray
Chronos Gray Metallic / Manhattan Gray Metallic
Green
Not available
Red
Not available
White
Arkona White / Glacier White Metallic
Brown
Madeira Brown Metallic
Silver
Florett Silver Metallic
Interior Colors
Beige
Canberra Beige
Black
Black / Black w/ Blue Contrast Stitching / Black w/ Red Highlight
Brown
Cognac / Mocha
Gray
Oyster
Red
Tacora Red
Interior Colors
Beige
Pearl Beige w/ Agate Gray Stitching
Black
Black
Brown
Okapi Brown w/ Steel Gray Stitching
Gray
Not available
Red
Not available
