Audi S6 vs. BMW M3
iSeeCars' unbiased and data-driven comparison of the Audi S6 and BMW M3 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 Audi S6 and the BMW M3.
When we compare the Audi S6's and the BMW M3's specifications and ratings, the Audi S6 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 interior volume. The BMW M3 has the advantage in the areas of resale value and base engine power. Based on this comparison of the Audi S6's and the BMW M3's specifications and ratings, the Audi S6 is a better car than the BMW M3.
Pricing: A used 2025 Audi S6 ranges from $72,992 to $84,694 while a used 2025 BMW M3 is priced between $81,919 to $109,870. For a new model, the Audi S6's price is between $81,378 and $99,959, with the BMW M3 priced between $83,110 and $112,475.
Resale/Retained Value: Looking at the 5-year depreciation rate for both models, the Audi S6 loses 57.7 percent of its value and the BMW M3 loses 54.2 percent of its value. This means the BMW M3 retains 3.5 percentage points more of its value and has the advantage of higher resale value versus the Audi S6.
Engine Power and Fuel Efficiency Comparison: For engine performance, the Audi S6’s base engine makes 444 horsepower, and the BMW M3 base engine makes 473 horsepower. The S6 is rated to deliver an average of 22 miles per gallon, with a highway range of 521 miles. The M3 is rated to deliver an average of 19 miles per gallon, with a highway range of 359 miles. This gives the Audi S6 the fuel efficiency and maximum range advantage over the BMW M3. Both models use premium unleaded.
Passenger Space Comparison: The Audi S6, 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 M3, a compact car, has the advantage in the areas of front head room, front leg room and cargo space.
New Car Pricing
Asking Price:
81378 - 99959
Starting MSRP:
75900
Category Avg Starting MSRP:
(Luxury Midsize Cars)
79467
Category Starting MSRP Range:
(Luxury Midsize Cars)
42140 - 200195
New Car Pricing
Asking Price:
83110 - 112475
Starting MSRP:
76700
Category Avg Starting MSRP:
(Luxury Compact Cars)
49451
Category Starting MSRP Range:
(Luxury Compact Cars)
33000 - 79900
Used Car Pricing
Avg Used Car Price:
79388
Price Range:
72992 - 84694
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:
Used Car Pricing
Avg Used Car Price:
95081
Price Range:
81919 - 109870
Category Avg Price:
(Luxury Compact Cars)
51959
Category Avg Price Range:
(Luxury Compact Cars)
34107 - 95081
# Used Cars for Sale Nationally:
Avg Mileage of Used Cars for Sale:
# Good or Great Deals:
5-year Depreciation
Depreciation $:
43983
Depreciation %:
0.57948844
Resale Value $:
31917
Typical Category Depreciation %:
(Luxury Midsize Cars)
0.49394848
Category Depreciation Range:
(Luxury Midsize Cars)
0.39819597 - 0.61156182
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
Audi S6 Scores & Rankings
Overall Score:
Not available
Reliability:
Not available
Retained Value:
7.3 / 10
Safety:
Not available
BMW M3 Scores & Rankings
Overall Score:
7.3 / 10
Reliability:
7.0 / 10
Retained Value:
7.5 / 10
Safety:
Not available
iSeeCars Reliability Insights for Audi S6
Avg Life Expectancy (years):
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:
iSeeCars Reliability Insights for BMW M3
Avg Life Expectancy (years):
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:
Expected 30-year Lifetime Recalls
Expected Lifetime Recalls:
2.052602770352568
Typical Category Recalls:
(Luxury Midsize Cars)
3.0
Category Range for Recalls:
(Luxury Midsize Cars)
1.5 - 35.8
Expected 30-year Lifetime Recalls
Expected Lifetime Recalls:
6.96382201764952
Typical Category Recalls:
(Luxury Compact Cars)
2.2
Category Range for Recalls:
(Luxury Compact Cars)
1.5 - 10.4
Audi S6 Rankings
Ranking
9 out of / 24Ranking
9 out of / 24Ranking
12 out of / 18Ranking
14 out of / 24Ranking
15 out of / 24Ranking
16 out of / 24BMW M3 Rankings
Ranking
1 out of / 3Ranking
1 out of / 2Ranking
2 out of / 36Ranking
2 out of / 36Ranking
7 out of / 36Ranking
9 out of / 36Ranking
20 out of / 36Ranking
20 out of / 36Ranking
30 out of / 36Ranking
30 out of / 32Available Body Styles
Sedan
Available Body Styles
Sedan
Available Drivetrain Options
Gasoline
Available Drivetrain Options
Gasoline
Audi S6 Trim Levels
2.9T quattro Premium, 2.9T quattro Premium Plus, 2.9T quattro Prestige
BMW M3 Trim Levels
Base, Competition, Competition xDrive
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:
5 out of 5 Stars
2025 NHTSA Front Crash Overall Rating:
Not yet available
2025 NHTSA Side Crash Overall Rating:
Not yet available
2025 NHTSA Rollover Rating:
5 out of 5 Stars
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:
444 hp @ 5900 rpm
Torque:
442 foot-lbs @ 2700 rpm
Power-to-Weight Ratio (higher is better):
0.098 hp per pound
Base Drivetrain Specs
Horsepower:
473 hp @ 6250 rpm
Torque:
406 foot-lbs @ 2650 rpm
Power-to-Weight Ratio (higher is better):
0.123 hp per pound
Engine Specifications
Engine Size:
2.9 liters
Engine Configuration:
V
Number of Cylinders:
6
Transmission:
Automatic
Standard/Optional Drivetrain Type:
AWD
EPA Fuel Economy
(City/Highway/Combined MPG):
19 / 27 / 22
Range (city/hwy):
367 / 521 miles
Recommended Fuel Type:
Premium Unleaded
Engine Specifications
Engine Size:
3 liters
Engine Configuration:
Inline
Number of Cylinders:
6
Transmission:
Manual
Standard/Optional Drivetrain Type:
RWD / AWD
EPA Fuel Economy
(City/Highway/Combined MPG):
16 / 23 / 19
Range (city/hwy):
250 / 359 miles
Recommended Fuel Type:
Premium Unleaded
Standard/Optional Features
Air Suspension:
Standard
Alloy wheels:
Standard
Android Auto:
Standard
Apple CarPlay:
Standard
Bench Seats:
Standard
Bluetooth:
Standard
Heated Seats
Standard
Heated Steering Wheel:
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
Adaptive Cruise Control:
Available
Automatic Parking:
Available
Cooled/Ventilated Seats:
Available
Massage Seats:
Available
Wireless Smartphone Charging:
Available
Captain's seat:
N/A
Front Bench Seats:
N/A
Panoramic Sunroof/Moonroof
N/A
Quad Seats:
N/A
Roof Rack:
N/A
Trailer Hitch:
N/A
Standard/Optional Features
Air Suspension:
N/A
Alloy wheels:
Standard
Android Auto:
Standard
Apple CarPlay:
Standard
Bench Seats:
Standard
Bluetooth:
Standard
Heated Seats
Standard
Heated Steering Wheel:
Available
Internet Radio:
Standard
Keyless Entry:
Standard
Keyless Ignition:
Standard
Leather Upholstery:
Standard
Navigation System:
Standard
Paddle Shifters:
Available
Parking Sensors:
Standard
Power Lift Gate:
Available
Power outlet:
Standard
Roadside assistance:
Standard
Satellite radio:
Standard
Sunroof/Moonroof:
Available
Voice Recognition:
Standard
Wifi:
Standard
Adaptive Cruise Control:
Available
Automatic Parking:
Available
Cooled/Ventilated Seats:
Available
Massage Seats:
N/A
Wireless Smartphone Charging:
Standard
Captain's seat:
N/A
Front Bench Seats:
N/A
Panoramic Sunroof/Moonroof
N/A
Quad Seats:
N/A
Roof Rack:
N/A
Trailer Hitch:
N/A
Safety Features
Backup camera:
Standard
Driver Attention Monitoring:
Standard
Forward Collision Warning:
Standard
Lane Departure Warning:
Standard
Lane Keeping Assist:
Standard
Pedestrian Detection:
Standard
360-Degree Camera:
Available
Blind Spot Monitoring:
Available
Rear Cross-Traffic Alert:
Available
Rear Seat Reminder:
N/A
Safety Features
Backup camera:
Standard
Driver Attention Monitoring:
Standard
Forward Collision Warning:
Standard
Lane Departure Warning:
Standard
Lane Keeping Assist:
Standard
Pedestrian Detection:
Standard
360-Degree Camera:
Available
Blind Spot Monitoring:
Standard
Rear Cross-Traffic Alert:
Standard
Rear Seat Reminder:
Standard
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:
98.0 cubic feet
Interior Dimensions
Front Head Room:
40.6 inches
Front Leg Room:
41.6 inches
Front Shoulder Room:
56 inches
Rear Head Room:
37.8 inches
Rear Leg Room:
35.6 inches
Rear Shoulder Room:
54.6 inches
Cargo Space:
16.9 cubic feet
Overall Interior Volume:
95.0 cubic feet
Exterior Dimensions
Curb Weight:
4519 lbs
Width:
83.1 inches
Height:
56.9 inches
Length:
195 inches
Wheelbase:
115.3 inches
Ground Clearance:
Not yet available
Exterior Dimensions
Curb Weight:
3840 lbs
Width:
81.4 inches
Height:
56.6 inches
Length:
189.1 inches
Wheelbase:
112.5 inches
Ground Clearance:
4.7 inches
Standard Wheel/Tire Information
Wheel Size:
21.0 x 8.5 inches
Wheel Type:
aluminum alloy
Tire Size:
255/35R21
Standard Wheel/Tire Information
Wheel Size:
18.0 x 9.5 inches
Wheel Type:
painted aluminum alloy
Tire Size:
275/40R18
Exterior Colors
Black
Brilliant Black / Mythos Black Metallic
Blue
Ascari Blue Metallic / Firmament Blue Metallic
Gray
Chronos Gray Metallic / Daytona Gray Pearl Effect
Red
Grenadine Red Metallic
Silver
Florett Silver Metallic
White
Glacier White Metallic
Green
Not available
Yellow
Not available
Exterior Colors
Black
Black Sapphire Metallic
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
Red
Aventurin Red Metallic / Toronto Red Metallic
Silver
Not available
White
Alpine White / Frozen Brilliant White Metallic
Green
Isle of Man Green Metallic
Yellow
Sao Paulo Yellow
Interior Colors
Black
Black w/ Rock Gray Stitching
Gray
Rotor Gray w/ Anthracite Stitching
Red
Arras Red w/ Agate Gray Stitching
Blue
Not available
Brown
Not available
Orange
Not available
White
Not available
Interior Colors
Black
Black
Gray
Silverstone/Black
Red
Fiona Red/Black
Blue
Fjord Blue/Black / Yas Marina Blue/Black w/ Yellow Accent
Brown
Tartufo
Orange
Kyalami Orange/Black
White
Ivory White
