Car comparison

AUDI S6 Avant (C7) 4.0 TFSI V8vsMercedes-Benz R-class (W251) AMG R 63 V8

Compare specs, acceleration, fuel consumption, dimensions, practicality, and estimated running costs side by side.

New comparison

AUDI S6 Avant (C7)

4.0 TFSI V8

420 hp3993 ccGasolineAWDAutomaticTurbochargedWagon / estate2012-2014
VS

Mercedes-Benz R-class (W251)

AMG R 63 V8

510 hp6208 ccGasolineAWDAutomaticNaturally aspiratedWagon / estate2006-2007

Comparison overview

Use the estimates as comparison hints and verify exact figures before making decisions.

Best choices

AUDI S6 Avant (C7) 4.0 TFSI V8

  • Quickest 0-100 km/h
    4.7 s
  • Fastest top speed
    260 km/h
    162 mph Unrestricted
    250 km/h
    155 mph Restricted
  • Lightest
    1,950 kg
    4,299 lb
  • Lowest combined fuel consumption
    9.7 L/100 km
    24.2 mpg US
    29.1 mpg UK
  • Lowest city consumption
    13.4 L/100 km
    17.6 mpg US
    21.1 mpg UK
  • Lowest highway consumption
    7.5 L/100 km
    31.4 mpg US
    37.7 mpg UK
  • Best estimated range
    773 km
    480 mi
  • Largest trunk
    565 L
  • Best economy score
    81/100
  • Best practicality score
    87/100

Specification comparison

Specification comparison
ModelAUDIS6 Avant (C7)4.0 TFSI V8Mercedes-BenzR-class (W251)AMG R 63 V8
Power
420hp313kW
510hp380kW
Torque
550Nm406lb-ft
630Nm465lb-ft
Curb weight
1,950kg4,299lb
2,330kg5,137lb
Gross weight
2,580kg5,688lb
2,900kg6,393lb
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Calculated
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Calculated
To 99% top speed
48.5s99% target: 257 km/h / 160 mph
Calculated
55.6s99% target: 257 km/h / 160 mph
Calculated
0-100 km/h
4.7s
5.0s
0-200 km/h
14.8s
Calculated
16.3s
Calculated
0-60 mph
4.5s
Calculated
4.8s
Calculated
Fuel consumption
9.7L/100 km24.2mpg US29.1mpg UK
16.3L/100 km14.4mpg US17.3mpg UK
Fuel consumption city
13.4L/100 km17.6mpg US21.1mpg UK
24.1L/100 km9.8mpg US11.7mpg UK
Fuel consumption highway
7.5L/100 km31.4mpg US37.7mpg UK
11.8L/100 km19.9mpg US23.9mpg UK
Quarter mile
12.7s
Calculated
13.0s
Calculated
Power-to-weight
215hp/t161kW/t98hp/1000 lb
Calculated
219hp/t163kW/t99hp/1000 lb
Calculated
Torque-to-weight
282Nm/t189lb-ft/ton
Calculated
270Nm/t181lb-ft/ton
Calculated
Estimated range
773km480mi
Calculated
491km305mi
Calculated
Displacement
3,993cc244cu in
6,208cc379cu in
Length
4,934mm194in
4,930mm194in
Width
1,874mm74in
1,922mm76in
Height
1,482mm58in
1,634mm64in
Wheelbase
2,916mm115in
2,980mm117in
Front track
1,627mm64in
1,665mm66in
Rear track
1,618mm64in
1,652mm65in
Trunk volume
565L
433L
Max trunk volume
1,680L
2,407L
Doors
5
5
Seats
5
6
Fuel tank
75L
80L
CO2 emissions
226g/km
-

Performance charts

Use the estimates as comparison hints and verify exact figures before making decisions.

Dyno simulation

Estimated stock-style power and torque curves by engine speed.

AUDI S6 Avant (C7) 4.0 TFSI V8Mercedes-Benz R-class (W251) AMG R 63 V8PowerTorque
  • AUDI S6 Avant (C7) 4.0 TFSI V8: Power / Torque
  • Mercedes-Benz R-class (W251) AMG R 63 V8: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
AUDIS6 Avant (C7)4.0 TFSI V85,500-6,400 rpm1,400-5,200 rpm6,650 rpm
Mercedes-BenzR-class (W251)AMG R 63 V86,800 rpm5,200 rpm7,050 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricAUDIS6 Avant (C7)4.0 TFSI V8Mercedes-BenzR-class (W251)AMG R 63 V8
Acceleration checkpoints
0-60 mph
0-97 km/h
4.5 s
4.8 s
0-100 km/h
0-62 mph
4.7 s
5.0 s
0-200 km/h
0-124 mph
14.8 s
16.3 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Likely limited
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Limited
Drag race simulation
60 ft
18 m
2.2 s
2.3 s
330 ft
101 m
5.7 s
5.8 s
1/8 mile
201 m
8.4 s
8.6 s
1000 ft
305 m
10.7 s
11.0 s
1/4 mile
402 m
12.7 s
13.0 s
Trap speed
1/4 mile
402 m
187 km/h
116 mph
181 km/h
112 mph

Power comparison

Bar comparison chart for Power. Higher is better · hp / kW

Chart data table
VehicleValue
AUDIS6 Avant (C7)4.0 TFSI V8
420 hp
313 kW
Mercedes-BenzR-class (W251)AMG R 63 V8
510 hp
380 kW

Mercedes-Benz R-class (W251) AMG R 63 V8 has 90 hp more than AUDI S6 Avant (C7) 4.0 TFSI V8.

The biggest power difference is between AUDI S6 Avant (C7) 4.0 TFSI V8 and Mercedes-Benz R-class (W251) AMG R 63 V8: 90 hp (67 kW).

Torque comparison

Bar comparison chart for Torque. Higher is better · Nm / lb-ft

Chart data table
VehicleValue
AUDIS6 Avant (C7)4.0 TFSI V8
550 Nm
406 lb-ft
Mercedes-BenzR-class (W251)AMG R 63 V8
630 Nm
465 lb-ft

Curb weight comparison

Bar comparison chart for Curb weight. Lower is better · kg / lb

Chart data table
VehicleValue
AUDIS6 Avant (C7)4.0 TFSI V8
1,950 kg
4,299 lb
Mercedes-BenzR-class (W251)AMG R 63 V8
2,330 kg
5,137 lb

Top speed without limiter comparison

Bar comparison chart for Top speed without limiter. Higher is better · km/h / mph

Chart data table
VehicleValue
AUDIS6 Avant (C7)4.0 TFSI V8
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Mercedes-BenzR-class (W251)AMG R 63 V8
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph

0-100 km/h comparison

Bar comparison chart for 0-100 km/h. Lower is better · seconds

Chart data table
VehicleValue
AUDIS6 Avant (C7)4.0 TFSI V84.7 s
Mercedes-BenzR-class (W251)AMG R 63 V85.0 s

Although Mercedes-Benz R-class (W251) AMG R 63 V8 has more power, AUDI S6 Avant (C7) 4.0 TFSI V8 is quicker from 0-100 km/h.

The biggest 0-100 km/h difference is between AUDI S6 Avant (C7) 4.0 TFSI V8 and Mercedes-Benz R-class (W251) AMG R 63 V8: 0.3 s.

Fuel consumption comparison

Bar comparison chart for Fuel consumption. Lower is better · L/100 km / mpg US / mpg UK

Chart data table
VehicleValue
AUDIS6 Avant (C7)4.0 TFSI V8
9.7 L/100 km
24.2 mpg US
29.1 mpg UK
Mercedes-BenzR-class (W251)AMG R 63 V8
16.3 L/100 km
14.4 mpg US
17.3 mpg UK

The biggest fuel consumption difference is between AUDI S6 Avant (C7) 4.0 TFSI V8 and Mercedes-Benz R-class (W251) AMG R 63 V8: 6.6 L/100 km.

Power-to-weight comparison

Bar comparison chart for Power-to-weight. Higher is better · hp/t / kW/t

Chart data table
VehicleValue
AUDIS6 Avant (C7)4.0 TFSI V8
215 hp/t
161 kW/t
4.6 kg/hp
Mercedes-BenzR-class (W251)AMG R 63 V8
219 hp/t
163 kW/t
4.6 kg/hp

Estimated range comparison

Bar comparison chart for Estimated range. Higher is better · km / mi

Chart data table
VehicleValue
AUDIS6 Avant (C7)4.0 TFSI V8
773 km
480 mi
Mercedes-BenzR-class (W251)AMG R 63 V8
491 km
305 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
AUDIS6 Avant (C7)4.0 TFSI V8
420 hp
313 kW
4.7 s
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Mercedes-BenzR-class (W251)AMG R 63 V8
510 hp
380 kW
5.0 s
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph

Most attractive quadrant

Scatter chart with performance score on the X axis and practicality score on the Y axis.

Chart data table
VehiclePerformance scorePracticality score
AUDIS6 Avant (C7)4.0 TFSI V8
Power
420 hp
313 kW
0-100 km/h4.7 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Doors/seats
5 doors
5 seats
Trunk
565 L
20.0 cu ft
Length
4,934 mm
194.3 in
Height
1,482 mm
58.3 in
Mercedes-BenzR-class (W251)AMG R 63 V8
Power
510 hp
380 kW
0-100 km/h5.0 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Doors/seats
5 doors
6 seats
Trunk
433 L
15.3 cu ft
Length
4,930 mm
194.1 in
Height
1,634 mm
64.3 in

Performance vs fuel economy

Cars closer to the top-right corner combine stronger performance with better fuel economy scores.

Performance vs fuel economy data table
VehiclePerformance scoreFuel economy score
AUDIS6 Avant (C7)4.0 TFSI V8
Power
420 hp
313 kW
0-100 km/h4.7 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
9.7 L/100 km
24.2 mpg US
29.1 mpg UK
Mercedes-BenzR-class (W251)AMG R 63 V8
Power
510 hp
380 kW
0-100 km/h5.0 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
16.3 L/100 km
14.4 mpg US
17.3 mpg UK

AUDI S6 Avant (C7) 4.0 TFSI V8 is closest to the top-right balance target for performance and fuel economy.

Acceleration vs fuel consumption

Cars closer to the lower-left corner offer a better mix of quick acceleration and low fuel consumption.

Acceleration vs fuel consumption data table
VehicleFuel consumption, L/100 km0-100 km/h, s
AUDIS6 Avant (C7)4.0 TFSI V8
9.7 L/100 km
24.2 mpg US
29.1 mpg UK
4.7 s
Mercedes-BenzR-class (W251)AMG R 63 V8
16.3 L/100 km
14.4 mpg US
17.3 mpg UK
5.0 s

Power-to-weight vs fuel consumption

The shaded area favors higher power-to-weight with lower combined fuel consumption.

Power-to-weight vs fuel consumption data table
VehiclePower-to-weight, hp/tFuel consumption, L/100 km
AUDIS6 Avant (C7)4.0 TFSI V8
215 hp/t
161 kW/t
4.6 kg/hp
9.7 L/100 km
24.2 mpg US
29.1 mpg UK
Mercedes-BenzR-class (W251)AMG R 63 V8
219 hp/t
163 kW/t
4.6 kg/hp
16.3 L/100 km
14.4 mpg US
17.3 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleAUDIS6 Avant (C7)4.0 TFSI V8Mercedes-BenzR-class (W251)AMG R 63 V8
Power
420 hp
313 kW
510 hp
380 kW
Torque
550 Nm
406 lb-ft
630 Nm
465 lb-ft
Acceleration
4.7 s
5.0 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Lightness
1,950 kg
4,299 lb
2,330 kg
5,137 lb
Fuel consumption
9.7 L/100 km
24.2 mpg US
29.1 mpg UK
16.3 L/100 km
14.4 mpg US
17.3 mpg UK
Practicality
Doors/seats
5 doors
5 seats
Trunk
565 L
20.0 cu ft
Length
4,934 mm
194.3 in
Height
1,482 mm
58.3 in
Doors/seats
5 doors
6 seats
Trunk
433 L
15.3 cu ft
Length
4,930 mm
194.1 in
Height
1,634 mm
64.3 in
Range score
773 km
480 mi
491 km
305 mi
CO2 score
226 g/km
-
Trunk score
565 L
20.0 cu ft
433 L
15.3 cu ft
Power-to-weight score
215 hp/t
161 kW/t
4.6 kg/hp
219 hp/t
163 kW/t
4.6 kg/hp
Overall
Fixed score
Fixed score

Fuel cost and annual usage

Estimate running costs from combined consumption, your annual distance, and the fuel price in your local currency.

Enter the fuel price in your local currency, for example €/L, $/gal, £/L or any other local currency.

LC = Local Currency

Fuel cost and annual usage
VehicleAUDI S6 Avant (C7) 4.0 TFSI V8Mercedes-Benz R-class (W251) AMG R 63 V8
Consumption9.7 L/100 km24.2 mpg US29.1 mpg UK16.3 L/100 km14.4 mpg US17.3 mpg UK
Cost / 100 km16.97 LC100 km28.53 LC100 km
Cost / 100 mi27.32 LC100 mi45.91 LC100 mi
Annual fuel used1,455 L384 US gal320 UK gal2,445 L646 US gal538 UK gal
Annual fuel cost2,546 LC/year4,279 LC/year

Head-to-head comparisons

AUDI S6 Avant (C7) 4.0 TFSI V8

  • Is 380 kg lighter
  • Is 0.3 s quicker from 0-100 km/h
  • Uses 6.6 L/100 km less fuel
  • Has 282 km (175 mi) more estimated range
  • Has 132 L more trunk volume

Pros

  • Quickest 0-100 km/h in this comparison
  • Highest top speed
  • Lightest
  • Lowest combined fuel consumption
  • Best estimated range
  • Largest trunk

Cons

  • Lowest power

Mercedes-Benz R-class (W251) AMG R 63 V8

  • Has 90 hp more
  • Has 80 Nm more
  • Has 3 hp/t better power-to-weight

Pros

  • Most powerful
  • Highest torque
  • Best power-to-weight ratio

Cons

  • Slowest 0-100 km/h
  • Highest combined fuel consumption
  • Heaviest
  • Smallest trunk

Choose cars to compare

Brand
Model
Generation
Engine or modification
AUDI S6 Avant (C7) 4.0 TFSI V8
Mercedes-Benz R-class (W251) AMG R 63 V8
Compare selected cars
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