Car comparison

AUDI RS6 Avant (C8) GT 4.0 TFSI V8vsAUDI A6 Avant (C9) 3.0 TFSI V6

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

New comparison

AUDI RS6 Avant (C8)

GT 4.0 TFSI V8

630 hp3996 ccGasolineAWDAutomaticTurbochargedWagon / estate2024-2025
VS

AUDI A6 Avant (C9)

3.0 TFSI V6

367 hp2995 ccGasolineAWDAutomaticTurbochargedWagon / estate2025-present

Comparison overview

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

Best choices

AUDI RS6 Avant (C8) GT 4.0 TFSI V8

  • Quickest 0-100 km/h
    3.3 s
  • Fastest top speed
    305 km/h
    190 mph
  • Most powerful
    630 hp
    470 kW
  • Highest torque
    850 Nm
    627 lb-ft
  • Best power-to-weight
    304 hp/t
    226 kW/t
    3.3 kg/hp
  • Largest trunk
    548 L
  • Best overall score
    89/100
  • Best performance score
    90/100
  • Best practicality score
    86/100

AUDI A6 Avant (C9) 3.0 TFSI V6

  • Lightest
    2,000 kg
    4,409 lb
  • Lowest combined fuel consumption
    7.8 L/100 km
    30.2 mpg US
    36.2 mpg UK
  • Best estimated range
    782 km
    486 mi
  • Best economy score
    86/100

Specification comparison

Specification comparison
ModelAUDIRS6 Avant (C8)GT 4.0 TFSI V8AUDIA6 Avant (C9)3.0 TFSI V6
Power
630hp470kW
367hp274kW
Torque
850Nm627lb-ft
550Nm406lb-ft
Curb weight
2,075kg4,575lb
2,000kg4,409lb
Gross weight
2,740kg6,041lb
2,645kg5,831lb
Top speed
305 km/h
190 mph
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Calculated
To 99% top speed
39.1s99% target: 302 km/h / 188 mph
Calculated
49.4s99% target: 257 km/h / 160 mph
Calculated
0-100 km/h
3.3s
4.7s
0-200 km/h
8.9s
Calculated
14.9s
Calculated
0-60 mph
3.2s
Calculated
4.5s
Calculated
Fuel consumption
12.7L/100 km18.5mpg US22.2mpg UK
7.8L/100 km30.2mpg US36.2mpg UK
Quarter mile
10.8s
Calculated
12.7s
Calculated
Power-to-weight
304hp/t226kW/t138hp/1000 lb
Calculated
184hp/t137kW/t83hp/1000 lb
Calculated
Torque-to-weight
410Nm/t274lb-ft/ton
Calculated
275Nm/t184lb-ft/ton
Calculated
Estimated range
575km357mi
Calculated
782km486mi
Calculated
Displacement
3,996cc244cu in
2,995cc183cu in
Length
5,018mm198in
4,999mm197in
Width
1,951mm77in
1,875mm74in
Height
1,513mm60in
1,472mm58in
Wheelbase
2,934mm116in
2,923mm115in
Front track-
1,626mm64in
Rear track-
1,610mm63in
Trunk volume
548L
466L
Max trunk volume
1,658L
1,497L
Doors
5
5
Seats
5
5
Fuel tank
73L
61L

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 RS6 Avant (C8) GT 4.0 TFSI V8AUDI A6 Avant (C9) 3.0 TFSI V6PowerTorque
  • AUDI RS6 Avant (C8) GT 4.0 TFSI V8: Power / Torque
  • AUDI A6 Avant (C9) 3.0 TFSI V6: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
AUDIRS6 Avant (C8)GT 4.0 TFSI V86,000 rpm2,300-4,500 rpm6,250 rpm
AUDIA6 Avant (C9)3.0 TFSI V65,500-6,300 rpm1,700-4,000 rpm6,550 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricAUDIRS6 Avant (C8)GT 4.0 TFSI V8AUDIA6 Avant (C9)3.0 TFSI V6
Acceleration checkpoints
0-60 mph
0-97 km/h
3.2 s
4.5 s
0-100 km/h
0-62 mph
3.3 s
4.7 s
0-200 km/h
0-124 mph
8.9 s
14.9 s
Top speed
305 km/h
190 mph
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Limited
Drag race simulation
60 ft
18 m
2.0 s
2.2 s
330 ft
101 m
4.9 s
5.7 s
1/8 mile
201 m
7.2 s
8.4 s
1000 ft
305 m
9.2 s
10.7 s
1/4 mile
402 m
10.8 s
12.7 s
Trap speed
1/4 mile
402 m
221 km/h
137 mph
186 km/h
116 mph

Power comparison

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

Chart data table
VehicleValue
AUDIRS6 Avant (C8)GT 4.0 TFSI V8
630 hp
470 kW
AUDIA6 Avant (C9)3.0 TFSI V6
367 hp
274 kW

AUDI RS6 Avant (C8) GT 4.0 TFSI V8 has 263 hp more than AUDI A6 Avant (C9) 3.0 TFSI V6.

The biggest power difference is between AUDI A6 Avant (C9) 3.0 TFSI V6 and AUDI RS6 Avant (C8) GT 4.0 TFSI V8: 263 hp (196 kW).

Torque comparison

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

Chart data table
VehicleValue
AUDIRS6 Avant (C8)GT 4.0 TFSI V8
850 Nm
627 lb-ft
AUDIA6 Avant (C9)3.0 TFSI V6
550 Nm
406 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
AUDIRS6 Avant (C8)GT 4.0 TFSI V8
2,075 kg
4,575 lb
AUDIA6 Avant (C9)3.0 TFSI V6
2,000 kg
4,409 lb

Top speed without limiter comparison

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

Chart data table
VehicleValue
AUDIRS6 Avant (C8)GT 4.0 TFSI V8
305 km/h
190 mph
AUDIA6 Avant (C9)3.0 TFSI V6
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
AUDIRS6 Avant (C8)GT 4.0 TFSI V83.3 s
AUDIA6 Avant (C9)3.0 TFSI V64.7 s

The biggest 0-100 km/h difference is between AUDI RS6 Avant (C8) GT 4.0 TFSI V8 and AUDI A6 Avant (C9) 3.0 TFSI V6: 1.4 s.

Fuel consumption comparison

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

Chart data table
VehicleValue
AUDIRS6 Avant (C8)GT 4.0 TFSI V8
12.7 L/100 km
18.5 mpg US
22.2 mpg UK
AUDIA6 Avant (C9)3.0 TFSI V6
7.8 L/100 km
30.2 mpg US
36.2 mpg UK

The biggest fuel consumption difference is between AUDI A6 Avant (C9) 3.0 TFSI V6 and AUDI RS6 Avant (C8) GT 4.0 TFSI V8: 4.9 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
AUDIRS6 Avant (C8)GT 4.0 TFSI V8
304 hp/t
226 kW/t
3.3 kg/hp
AUDIA6 Avant (C9)3.0 TFSI V6
184 hp/t
137 kW/t
5.4 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
AUDIRS6 Avant (C8)GT 4.0 TFSI V8
575 km
357 mi
AUDIA6 Avant (C9)3.0 TFSI V6
782 km
486 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
AUDIRS6 Avant (C8)GT 4.0 TFSI V8
630 hp
470 kW
3.3 s
305 km/h
190 mph
AUDIA6 Avant (C9)3.0 TFSI V6
367 hp
274 kW
4.7 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
AUDIRS6 Avant (C8)GT 4.0 TFSI V8
Power
630 hp
470 kW
0-100 km/h3.3 s
Top speed
305 km/h
190 mph
Doors/seats
5 doors
5 seats
Trunk
548 L
19.4 cu ft
Length
5,018 mm
197.6 in
Height
1,513 mm
59.6 in
AUDIA6 Avant (C9)3.0 TFSI V6
Power
367 hp
274 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
466 L
16.5 cu ft
Length
4,999 mm
196.8 in
Height
1,472 mm
58.0 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
AUDIRS6 Avant (C8)GT 4.0 TFSI V8
Power
630 hp
470 kW
0-100 km/h3.3 s
Top speed
305 km/h
190 mph
12.7 L/100 km
18.5 mpg US
22.2 mpg UK
AUDIA6 Avant (C9)3.0 TFSI V6
Power
367 hp
274 kW
0-100 km/h4.7 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
7.8 L/100 km
30.2 mpg US
36.2 mpg UK

AUDI RS6 Avant (C8) GT 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
AUDIRS6 Avant (C8)GT 4.0 TFSI V8
12.7 L/100 km
18.5 mpg US
22.2 mpg UK
3.3 s
AUDIA6 Avant (C9)3.0 TFSI V6
7.8 L/100 km
30.2 mpg US
36.2 mpg UK
4.7 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
AUDIRS6 Avant (C8)GT 4.0 TFSI V8
304 hp/t
226 kW/t
3.3 kg/hp
12.7 L/100 km
18.5 mpg US
22.2 mpg UK
AUDIA6 Avant (C9)3.0 TFSI V6
184 hp/t
137 kW/t
5.4 kg/hp
7.8 L/100 km
30.2 mpg US
36.2 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleAUDIRS6 Avant (C8)GT 4.0 TFSI V8AUDIA6 Avant (C9)3.0 TFSI V6
Power
630 hp
470 kW
367 hp
274 kW
Torque
850 Nm
627 lb-ft
550 Nm
406 lb-ft
Acceleration
3.3 s
4.7 s
Top speed
305 km/h
190 mph
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Lightness
2,075 kg
4,575 lb
2,000 kg
4,409 lb
Fuel consumption
12.7 L/100 km
18.5 mpg US
22.2 mpg UK
7.8 L/100 km
30.2 mpg US
36.2 mpg UK
Practicality
Doors/seats
5 doors
5 seats
Trunk
548 L
19.4 cu ft
Length
5,018 mm
197.6 in
Height
1,513 mm
59.6 in
Doors/seats
5 doors
5 seats
Trunk
466 L
16.5 cu ft
Length
4,999 mm
196.8 in
Height
1,472 mm
58.0 in
Range score
575 km
357 mi
782 km
486 mi
Trunk score
548 L
19.4 cu ft
466 L
16.5 cu ft
Power-to-weight score
304 hp/t
226 kW/t
3.3 kg/hp
184 hp/t
137 kW/t
5.4 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 RS6 Avant (C8) GT 4.0 TFSI V8AUDI A6 Avant (C9) 3.0 TFSI V6
Consumption12.7 L/100 km18.5 mpg US22.2 mpg UK7.8 L/100 km30.2 mpg US36.2 mpg UK
Cost / 100 km22.22 LC100 km13.65 LC100 km
Cost / 100 mi35.77 LC100 mi21.97 LC100 mi
Annual fuel used1,905 L503 US gal419 UK gal1,170 L309 US gal257 UK gal
Annual fuel cost3,334 LC/year2,048 LC/year

Head-to-head comparisons

AUDI RS6 Avant (C8) GT 4.0 TFSI V8

  • Has 263 hp more
  • Has 300 Nm more
  • Is 1.4 s quicker from 0-100 km/h
  • Has 45 km/h (28 mph) higher top speed
  • Has 120 hp/t better power-to-weight
  • Has 82 L more trunk volume

Pros

  • Quickest 0-100 km/h in this comparison
  • Highest top speed
  • Most powerful
  • Highest torque
  • Best power-to-weight ratio
  • Largest trunk

Cons

  • Highest combined fuel consumption
  • Heaviest

AUDI A6 Avant (C9) 3.0 TFSI V6

  • Is 75 kg lighter
  • Uses 4.9 L/100 km less fuel
  • Has 207 km (129 mi) more estimated range

Pros

  • Lightest
  • Lowest combined fuel consumption
  • Best estimated range

Cons

  • Slowest 0-100 km/h
  • Lowest power
  • Lowest top speed
  • Smallest trunk

Choose cars to compare

Brand
Model
Generation
Engine or modification
AUDI RS6 Avant (C8) GT 4.0 TFSI V8
AUDI A6 Avant (C9) 3.0 TFSI V6
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2 vehicles selected

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