The Comparative Analysis :

Audi S6 (08 - 10) vs. BMW M550i xDrive Steptronic (17 - 18)

€ 86,800
Audi S6 (08 - 10) Audi S6
€ 86,300
 BMW M550i xDrive Steptronic (17 - 18) BMW M550i
€ 86,800
Base Price ⓘBase price of a new vehicle with standard equipment in Germany at market launch.
€ 86,300

ⓘBase price of a new vehicle with standard equipment in Germany at market launch. Price Info

Vehicle Dimensions

The Audi S6 is a little smaller in every dimension. It's 0.9 inches shorter, 0.2 inches narrower and an inch lower than the BMW M550i.
Audi S6
BMW M550i
56.8
Blueprint Audi S6 (08 - 10)
73.4
79.9
57.8
Blueprint BMW M550i xDrive Steptronic (17 - 18)
73.5
83.7
73.4 in
Width
73.5 in
79.9 in
Width Incl. Mirrors
83.7 in
56.8 in
Height
57.8 in
Blueprint Audi S6 (08 - 10)
112.1
194.4
Blueprint BMW M550i xDrive Steptronic (17 - 18)
117.1
195.4
194.4 in
Length
195.4 in
112.1 in
Wheelbase
117.1 in

Vehicle Weight

Audi S6
BMW M550i
4376 lb
Curb Weight
4156 lb
5490 lb
Gross Vehicle
Weight
5423 lb
Audi S6 (08 - 10)
Weight Difference:
220 lb
5.03 %
BMW M550i xDrive Steptronic (17 - 18)

General

Audi S6
BMW M550i
C6 (4F)
Generation
G30
Sedan
Car Body Style
Sedan
Premium Unleaded
Fuel Type
Premium Unleaded
Permanent all-wheel drive (AWD)
Drivetrain
Permanent all-wheel drive (AWD)
6-speed automatic transmission
Transmission
8-speed automatic transmission

Engine

Audi S6
BMW M550i
V10 gasoline engine (nat­u­ral­ly as­pi­rat­ed engine)
Engine Type
V8 gasoline engine with two tur­bo­chargers (bi­turbo)
Engine Series
BMW N63
BXA
Engine Code
N63-B44
4
Valves
4
10
Cylinders
8
5.2 L / 254 cu in
Displacement
4.4 L / 215 cu in
429 hp
at 6800 rpm
Power
456 hp
at 5500 rpm
Audi S6
429 hp
456 hp
BMW M550i
398 lb‑ft
at 3000 rpm
Max. Torque
479 lb‑ft
at 1800 rpm
Audi S6
398 lb‑ft
479 lb‑ft
BMW M550i

Performance

Audi S6
BMW M550i
155 mph
Maximum Speed
155 mph
5.2 sec
Acceleration 0 to 62 mph
4 sec
62 mph 62
mph

236 ft
0.000 sec

Audi S6

62 mph 62
mph

184 ft
0.000 sec

BMW M550i

▶ REPLAY
10.2 lb/hp
Weight-to-Power Ratio
9.11 lb/hp
Audi S6
10.2 lb/hp
9.11 lb/hp
BMW M550i

Fuel Economy / Emissions

Audi S6
BMW M550i
Fuel Economy
19 mpg
combined
26 mpg
Audi S6
19 mpg
26 mpg
BMW M550i
13 mpg
city
19 mpg
No data
highway
No data
Kraftstoffanzeige
21.1 gal
Fuel Tank Capacity
18 gal
Kraftstoffanzeige
395 mi
Range
475 mi
Audi S6
395 mi
475 mi
BMW M550i
Environmental Impact
238.7 kWh
Total Energy Consumption
per 100 miles ⓘThe total energy consumption per 100 miles is the amount of energy consumed by a vehicle when burning fuel or using electricity per 100 miles (final energy), and the energy required to produce the appropriate amount of fuel or electricity (primary energy).
168.7 kWh
Audi S6
238.7 kWh
168.7 kWh
BMW M550i
Euro 4
Emission Standard
Euro 6c (NEFZ)
481 g/mi (NEFZ)
CO2 Emissions
328 g/mi (NEFZ)

Practical Convenience

Audi S6
BMW M550i
4
Doors
4
5
No. of Seats
5
1113 lb
Maximum Payload
1268 lb
15.5 cu ft
Trunk Volume
15 cu ft
No data
Cargo Volume (Seats Down)
No data