Car comparison

AUDI RS4 Avant (B9) 2.9 TFSIvsAUDI A6 allroad (C8) 55 TDI V6

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

New comparison

AUDI RS4 Avant (B9)

2.9 TFSI

450 hp2894 ccGasolineAWDAutomaticTwin-turboWagon / estate2017-2019
VS

AUDI A6 allroad (C8)

55 TDI V6

349 hp2967 ccDieselAWDAutomaticTurbochargedWagon / estate2019-2020

Comparison overview

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

Best choices

AUDI A6 allroad (C8) 55 TDI V6

  • Highest torque
    700 Nm
    516 lb-ft
  • Lowest combined fuel consumption
    6.6 L/100 km
    35.6 mpg US
    42.8 mpg UK
  • Lowest city consumption
    7.9 L/100 km
    29.8 mpg US
    35.8 mpg UK
  • Lowest highway consumption
    5.8 L/100 km
    40.6 mpg US
    48.7 mpg UK
  • Best estimated range
    955 km
    593 mi
  • Largest trunk
    565 L
  • Best economy score
    89/100
  • Best practicality score
    87/100

AUDI RS4 Avant (B9) 2.9 TFSI

  • Quickest 0-100 km/h
    4.1 s
  • Fastest top speed
    260 km/h
    162 mph Unrestricted
    250 km/h
    155 mph Restricted
  • Most powerful
    450 hp
    336 kW
  • Lightest
    1,715 kg
    3,781 lb
  • Best power-to-weight
    262 hp/t
    196 kW/t
    3.8 kg/hp
  • Best overall score
    81/100
  • Best performance score
    80/100

Specification comparison

Specification comparison
ModelAUDIRS4 Avant (B9)2.9 TFSIAUDIA6 allroad (C8)55 TDI V6
Power
450hp336kW
349hp260kW
Torque
600Nm443lb-ft
700Nm516lb-ft
Curb weight
1,715kg3,781lb
2,010kg4,431lb
Gross weight
2,305kg5,082lb
2,695kg5,941lb
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
38.6s99% target: 257 km/h / 160 mph
Calculated
58.6s99% target: 257 km/h / 160 mph
Calculated
0-100 km/h
4.1s
5.2s
0-200 km/h
12.3s
Calculated
17.1s
Calculated
0-60 mph
3.9s
Calculated
5.0s
Calculated
Fuel consumption
8.8L/100 km26.7mpg US32.1mpg UK
6.6L/100 km35.6mpg US42.8mpg UK
Fuel consumption city
11.6L/100 km20.3mpg US24.4mpg UK
7.9L/100 km29.8mpg US35.8mpg UK
Fuel consumption highway
7.2L/100 km32.7mpg US39.2mpg UK
5.8L/100 km40.6mpg US48.7mpg UK
Quarter mile
12.0s
Calculated
13.2s
Calculated
Power-to-weight
262hp/t196kW/t119hp/1000 lb
Calculated
174hp/t129kW/t79hp/1000 lb
Calculated
Torque-to-weight
350Nm/t234lb-ft/ton
Calculated
348Nm/t233lb-ft/ton
Calculated
Estimated range
659km410mi
Calculated
955km593mi
Calculated
Displacement
2,894cc177cu in
2,967cc181cu in
Length
4,781mm188in
4,951mm195in
Width
1,866mm73in
1,902mm75in
Height
1,404mm55in
1,542mm61in
Wheelbase
2,826mm111in
2,925mm115in
Front track
1,580mm62in
1,645mm65in
Rear track
1,575mm62in
1,611mm63in
Ground clearance-
184mm7in
Trunk volume
505L
565L
Max trunk volume-
1,680L
Doors
5
5
Seats
5
5
Fuel tank
58L
63L
CO2 emissions
200g/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 RS4 Avant (B9) 2.9 TFSIAUDI A6 allroad (C8) 55 TDI V6PowerTorque
  • AUDI RS4 Avant (B9) 2.9 TFSI: Power / Torque
  • AUDI A6 allroad (C8) 55 TDI V6: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
AUDIRS4 Avant (B9)2.9 TFSI5,700-6,700 rpm1,900-5,000 rpm6,950 rpm
AUDIA6 allroad (C8)55 TDI V63,850 rpm2,500-3,100 rpm4,100 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricAUDIRS4 Avant (B9)2.9 TFSIAUDIA6 allroad (C8)55 TDI V6
Acceleration checkpoints
0-60 mph
0-97 km/h
3.9 s
5.0 s
0-100 km/h
0-62 mph
4.1 s
5.2 s
0-200 km/h
0-124 mph
12.3 s
17.1 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
5.4 s
5.9 s
1/8 mile
201 m
7.9 s
8.7 s
1000 ft
305 m
10.1 s
11.2 s
1/4 mile
402 m
12.0 s
13.2 s
Trap speed
1/4 mile
402 m
197 km/h
123 mph
178 km/h
111 mph

Power comparison

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

Chart data table
VehicleValue
AUDIRS4 Avant (B9)2.9 TFSI
450 hp
336 kW
AUDIA6 allroad (C8)55 TDI V6
349 hp
260 kW

AUDI RS4 Avant (B9) 2.9 TFSI has 101 hp more than AUDI A6 allroad (C8) 55 TDI V6.

The biggest power difference is between AUDI A6 allroad (C8) 55 TDI V6 and AUDI RS4 Avant (B9) 2.9 TFSI: 101 hp (75 kW).

Torque comparison

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

Chart data table
VehicleValue
AUDIRS4 Avant (B9)2.9 TFSI
600 Nm
443 lb-ft
AUDIA6 allroad (C8)55 TDI V6
700 Nm
516 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
AUDIRS4 Avant (B9)2.9 TFSI
1,715 kg
3,781 lb
AUDIA6 allroad (C8)55 TDI V6
2,010 kg
4,431 lb

Top speed without limiter comparison

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

Chart data table
VehicleValue
AUDIRS4 Avant (B9)2.9 TFSI
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
AUDIA6 allroad (C8)55 TDI 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
AUDIRS4 Avant (B9)2.9 TFSI4.1 s
AUDIA6 allroad (C8)55 TDI V65.2 s

The biggest 0-100 km/h difference is between AUDI RS4 Avant (B9) 2.9 TFSI and AUDI A6 allroad (C8) 55 TDI V6: 1.1 s.

Fuel consumption comparison

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

Chart data table
VehicleValue
AUDIRS4 Avant (B9)2.9 TFSI
8.8 L/100 km
26.7 mpg US
32.1 mpg UK
AUDIA6 allroad (C8)55 TDI V6
6.6 L/100 km
35.6 mpg US
42.8 mpg UK

The biggest fuel consumption difference is between AUDI A6 allroad (C8) 55 TDI V6 and AUDI RS4 Avant (B9) 2.9 TFSI: 2.2 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
AUDIRS4 Avant (B9)2.9 TFSI
262 hp/t
196 kW/t
3.8 kg/hp
AUDIA6 allroad (C8)55 TDI V6
174 hp/t
129 kW/t
5.8 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
AUDIRS4 Avant (B9)2.9 TFSI
659 km
410 mi
AUDIA6 allroad (C8)55 TDI V6
955 km
593 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
AUDIRS4 Avant (B9)2.9 TFSI
450 hp
336 kW
4.1 s
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
AUDIA6 allroad (C8)55 TDI V6
349 hp
260 kW
5.2 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
AUDIRS4 Avant (B9)2.9 TFSI
Power
450 hp
336 kW
0-100 km/h4.1 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Doors/seats
5 doors
5 seats
Trunk
505 L
17.8 cu ft
Length
4,781 mm
188.2 in
Height
1,404 mm
55.3 in
AUDIA6 allroad (C8)55 TDI V6
Power
349 hp
260 kW
0-100 km/h5.2 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
4,951 mm
194.9 in
Height
1,542 mm
60.7 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
AUDIRS4 Avant (B9)2.9 TFSI
Power
450 hp
336 kW
0-100 km/h4.1 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
8.8 L/100 km
26.7 mpg US
32.1 mpg UK
AUDIA6 allroad (C8)55 TDI V6
Power
349 hp
260 kW
0-100 km/h5.2 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
6.6 L/100 km
35.6 mpg US
42.8 mpg UK

AUDI RS4 Avant (B9) 2.9 TFSI 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
AUDIRS4 Avant (B9)2.9 TFSI
8.8 L/100 km
26.7 mpg US
32.1 mpg UK
4.1 s
AUDIA6 allroad (C8)55 TDI V6
6.6 L/100 km
35.6 mpg US
42.8 mpg UK
5.2 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
AUDIRS4 Avant (B9)2.9 TFSI
262 hp/t
196 kW/t
3.8 kg/hp
8.8 L/100 km
26.7 mpg US
32.1 mpg UK
AUDIA6 allroad (C8)55 TDI V6
174 hp/t
129 kW/t
5.8 kg/hp
6.6 L/100 km
35.6 mpg US
42.8 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleAUDIRS4 Avant (B9)2.9 TFSIAUDIA6 allroad (C8)55 TDI V6
Power
450 hp
336 kW
349 hp
260 kW
Torque
600 Nm
443 lb-ft
700 Nm
516 lb-ft
Acceleration
4.1 s
5.2 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Lightness
1,715 kg
3,781 lb
2,010 kg
4,431 lb
Fuel consumption
8.8 L/100 km
26.7 mpg US
32.1 mpg UK
6.6 L/100 km
35.6 mpg US
42.8 mpg UK
Practicality
Doors/seats
5 doors
5 seats
Trunk
505 L
17.8 cu ft
Length
4,781 mm
188.2 in
Height
1,404 mm
55.3 in
Doors/seats
5 doors
5 seats
Trunk
565 L
20.0 cu ft
Length
4,951 mm
194.9 in
Height
1,542 mm
60.7 in
Range score
659 km
410 mi
955 km
593 mi
CO2 score
200 g/km
-
Trunk score
505 L
17.8 cu ft
565 L
20.0 cu ft
Power-to-weight score
262 hp/t
196 kW/t
3.8 kg/hp
174 hp/t
129 kW/t
5.8 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 RS4 Avant (B9) 2.9 TFSIAUDI A6 allroad (C8) 55 TDI V6
Consumption8.8 L/100 km26.7 mpg US32.1 mpg UK6.6 L/100 km35.6 mpg US42.8 mpg UK
Cost / 100 km15.40 LC100 km11.55 LC100 km
Cost / 100 mi24.78 LC100 mi18.59 LC100 mi
Annual fuel used1,320 L349 US gal290 UK gal990 L262 US gal218 UK gal
Annual fuel cost2,310 LC/year1,733 LC/year

Head-to-head comparisons

AUDI RS4 Avant (B9) 2.9 TFSI

  • Has 101 hp more
  • Is 295 kg lighter
  • Is 1.1 s quicker from 0-100 km/h
  • Has 89 hp/t better power-to-weight

Pros

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

Cons

  • Highest combined fuel consumption
  • Smallest trunk

AUDI A6 allroad (C8) 55 TDI V6

  • Has 100 Nm more
  • Uses 2.2 L/100 km less fuel
  • Has 295 km (184 mi) more estimated range
  • Has 60 L more trunk volume

Pros

  • Highest torque
  • Lowest combined fuel consumption
  • Best estimated range
  • Largest trunk

Cons

  • Slowest 0-100 km/h
  • Lowest power
  • Heaviest

Choose cars to compare

Brand
Model
Generation
Engine or modification
AUDI RS4 Avant (B9) 2.9 TFSI
AUDI A6 allroad (C8) 55 TDI V6
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