Car comparison

AUDI A6 Sedan (C8) 40 TDIvsAUDI A6 Avant (C9) 2.0 TFSI

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

New comparison

AUDI A6 Sedan (C8)

40 TDI

204 hp1968 ccDieselFWDAutomaticTurbochargedSedan2018-2023
VS

AUDI A6 Avant (C9)

2.0 TFSI

204 hp1984 ccGasolineFWDAutomaticTurbochargedWagon / estate2025-present

Comparison overview

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

Best choices

AUDI A6 Sedan (C8) 40 TDI

  • Quickest 0-100 km/h
    8.1 s
  • Fastest top speed
    246 km/h
    153 mph
  • Most powerful
    204 hp
    152 kW
  • Highest torque
    400 Nm
    295 lb-ft
  • Lightest
    1,645 kg
    3,627 lb
  • Best power-to-weight
    124 hp/t
    92 kW/t
    8.1 kg/hp
  • Lowest combined fuel consumption
    4.7 L/100 km
    50.0 mpg US
    60.1 mpg UK
  • Best estimated range
    1,340 km
    833 mi
  • Largest trunk
    530 L
  • Best overall score
    61/100
  • Best performance score
    53/100
  • Best economy score
    94/100

Specification comparison

Specification comparison
ModelAUDIA6 Sedan (C8)40 TDIAUDIA6 Avant (C9)2.0 TFSI
Power
204hp152kW
204hp152kW
Torque
400Nm295lb-ft
340Nm251lb-ft
Curb weight
1,645kg3,627lb
1,790kg3,946lb
Gross weight
2,255kg4,971lb
2,415kg5,324lb
Top speed
246 km/h
153 mph
240 km/h
149 mph
To 99% top speed
80.4s99% target: 244 km/h / 151 mph
Calculated
84.7s99% target: 238 km/h / 148 mph
Calculated
0-100 km/h
8.1s
8.3s
0-200 km/h
27.7s
Calculated
30.5s
Calculated
0-60 mph
7.7s
Calculated
7.9s
Calculated
Fuel consumption
4.7L/100 km50mpg US60.1mpg UK
8L/100 km29.4mpg US35.3mpg UK
Fuel consumption city
5.2L/100 km45.2mpg US54.3mpg UK
-
Fuel consumption highway
4.4L/100 km53.5mpg US64.2mpg UK
-
Quarter mile
15.8s
Calculated
16.0s
Calculated
Power-to-weight
124hp/t92kW/t56hp/1000 lb
Calculated
114hp/t85kW/t52hp/1000 lb
Calculated
Torque-to-weight
243Nm/t163lb-ft/ton
Calculated
190Nm/t127lb-ft/ton
Calculated
Estimated range
1,340km833mi
Calculated
763km474mi
Calculated
Displacement
1,968cc120cu in
1,984cc121cu in
Length
4,939mm194in
4,999mm197in
Width
1,886mm74in
1,875mm74in
Height
1,457mm57in
1,472mm58in
Wheelbase
2,924mm115in
2,923mm115in
Front track
1,630mm64in
1,631mm64in
Rear track
1,617mm64in
1,616mm64in
Trunk volume
530L
503L
Max trunk volume-
1,534L
Doors
4
5
Seats
5
5
Fuel tank
63L
61L
CO2 emissions
124g/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 A6 Sedan (C8) 40 TDIAUDI A6 Avant (C9) 2.0 TFSIPowerTorque
  • AUDI A6 Sedan (C8) 40 TDI: Power / Torque
  • AUDI A6 Avant (C9) 2.0 TFSI: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
AUDIA6 Sedan (C8)40 TDI3,750-4,200 rpm1,750-3,000 rpm4,450 rpm
AUDIA6 Avant (C9)2.0 TFSI4,300-6,000 rpm2,000-4,000 rpm6,250 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricAUDIA6 Sedan (C8)40 TDIAUDIA6 Avant (C9)2.0 TFSI
Acceleration checkpoints
0-60 mph
0-97 km/h
7.7 s
7.9 s
0-100 km/h
0-62 mph
8.1 s
8.3 s
0-200 km/h
0-124 mph
27.7 s
30.5 s
Top speed
246 km/h
153 mph
240 km/h
149 mph
Drag race simulation
60 ft
18 m
2.9 s
2.8 s
330 ft
101 m
7.2 s
7.2 s
1/8 mile
201 m
10.6 s
10.6 s
1000 ft
305 m
13.4 s
13.6 s
1/4 mile
402 m
15.8 s
16.0 s
Trap speed
1/4 mile
402 m
154 km/h
96 mph
151 km/h
94 mph

Power comparison

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

Chart data table
VehicleValue
AUDIA6 Sedan (C8)40 TDI
204 hp
152 kW
AUDIA6 Avant (C9)2.0 TFSI
204 hp
152 kW

Torque comparison

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

Chart data table
VehicleValue
AUDIA6 Sedan (C8)40 TDI
400 Nm
295 lb-ft
AUDIA6 Avant (C9)2.0 TFSI
340 Nm
251 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
AUDIA6 Sedan (C8)40 TDI
1,645 kg
3,627 lb
AUDIA6 Avant (C9)2.0 TFSI
1,790 kg
3,946 lb

Top speed without limiter comparison

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

Chart data table
VehicleValue
AUDIA6 Sedan (C8)40 TDI
246 km/h
153 mph
AUDIA6 Avant (C9)2.0 TFSI
240 km/h
149 mph

0-100 km/h comparison

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

Chart data table
VehicleValue
AUDIA6 Sedan (C8)40 TDI8.1 s
AUDIA6 Avant (C9)2.0 TFSI8.3 s

The biggest 0-100 km/h difference is between AUDI A6 Sedan (C8) 40 TDI and AUDI A6 Avant (C9) 2.0 TFSI: 0.2 s.

Fuel consumption comparison

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

Chart data table
VehicleValue
AUDIA6 Sedan (C8)40 TDI
4.7 L/100 km
50.0 mpg US
60.1 mpg UK
AUDIA6 Avant (C9)2.0 TFSI
8.0 L/100 km
29.4 mpg US
35.3 mpg UK

The biggest fuel consumption difference is between AUDI A6 Sedan (C8) 40 TDI and AUDI A6 Avant (C9) 2.0 TFSI: 3.3 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
AUDIA6 Sedan (C8)40 TDI
124 hp/t
92 kW/t
8.1 kg/hp
AUDIA6 Avant (C9)2.0 TFSI
114 hp/t
85 kW/t
8.8 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
AUDIA6 Sedan (C8)40 TDI
1,340 km
833 mi
AUDIA6 Avant (C9)2.0 TFSI
763 km
474 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
AUDIA6 Sedan (C8)40 TDI
204 hp
152 kW
8.1 s
246 km/h
153 mph
AUDIA6 Avant (C9)2.0 TFSI
204 hp
152 kW
8.3 s
240 km/h
149 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
AUDIA6 Sedan (C8)40 TDI
Power
204 hp
152 kW
0-100 km/h8.1 s
Top speed
246 km/h
153 mph
Doors/seats
4 doors
5 seats
Trunk
530 L
18.7 cu ft
Length
4,939 mm
194.4 in
Height
1,457 mm
57.4 in
AUDIA6 Avant (C9)2.0 TFSI
Power
204 hp
152 kW
0-100 km/h8.3 s
Top speed
240 km/h
149 mph
Doors/seats
5 doors
5 seats
Trunk
503 L
17.8 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
AUDIA6 Sedan (C8)40 TDI
Power
204 hp
152 kW
0-100 km/h8.1 s
Top speed
246 km/h
153 mph
4.7 L/100 km
50.0 mpg US
60.1 mpg UK
AUDIA6 Avant (C9)2.0 TFSI
Power
204 hp
152 kW
0-100 km/h8.3 s
Top speed
240 km/h
149 mph
8.0 L/100 km
29.4 mpg US
35.3 mpg UK

AUDI A6 Sedan (C8) 40 TDI 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
AUDIA6 Sedan (C8)40 TDI
4.7 L/100 km
50.0 mpg US
60.1 mpg UK
8.1 s
AUDIA6 Avant (C9)2.0 TFSI
8.0 L/100 km
29.4 mpg US
35.3 mpg UK
8.3 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
AUDIA6 Sedan (C8)40 TDI
124 hp/t
92 kW/t
8.1 kg/hp
4.7 L/100 km
50.0 mpg US
60.1 mpg UK
AUDIA6 Avant (C9)2.0 TFSI
114 hp/t
85 kW/t
8.8 kg/hp
8.0 L/100 km
29.4 mpg US
35.3 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleAUDIA6 Sedan (C8)40 TDIAUDIA6 Avant (C9)2.0 TFSI
Power
204 hp
152 kW
204 hp
152 kW
Torque
400 Nm
295 lb-ft
340 Nm
251 lb-ft
Acceleration
8.1 s
8.3 s
Top speed
246 km/h
153 mph
240 km/h
149 mph
Lightness
1,645 kg
3,627 lb
1,790 kg
3,946 lb
Fuel consumption
4.7 L/100 km
50.0 mpg US
60.1 mpg UK
8.0 L/100 km
29.4 mpg US
35.3 mpg UK
Practicality
Doors/seats
4 doors
5 seats
Trunk
530 L
18.7 cu ft
Length
4,939 mm
194.4 in
Height
1,457 mm
57.4 in
Doors/seats
5 doors
5 seats
Trunk
503 L
17.8 cu ft
Length
4,999 mm
196.8 in
Height
1,472 mm
58.0 in
Range score
1,340 km
833 mi
763 km
474 mi
CO2 score
124 g/km
-
Trunk score
530 L
18.7 cu ft
503 L
17.8 cu ft
Power-to-weight score
124 hp/t
92 kW/t
8.1 kg/hp
114 hp/t
85 kW/t
8.8 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 A6 Sedan (C8) 40 TDIAUDI A6 Avant (C9) 2.0 TFSI
Consumption4.7 L/100 km50 mpg US60.1 mpg UK8 L/100 km29.4 mpg US35.3 mpg UK
Cost / 100 km8.23 LC100 km14.00 LC100 km
Cost / 100 mi13.24 LC100 mi22.53 LC100 mi
Annual fuel used705 L186 US gal155 UK gal1,200 L317 US gal264 UK gal
Annual fuel cost1,234 LC/year2,100 LC/year

Head-to-head comparisons

AUDI A6 Sedan (C8) 40 TDI

  • Has 60 Nm more
  • Is 145 kg lighter
  • Is 0.2 s quicker from 0-100 km/h
  • Has 6 km/h (4 mph) higher top speed
  • Uses 3.3 L/100 km less fuel
  • Has 10 hp/t better power-to-weight
  • Has 578 km (359 mi) more estimated range
  • Has 27 L more trunk volume

Pros

  • Quickest 0-100 km/h in this comparison
  • Highest top speed
  • Most powerful
  • Highest torque
  • Lightest
  • Lowest combined fuel consumption
  • Best power-to-weight ratio
  • Best estimated range
  • Largest trunk

AUDI A6 Avant (C9) 2.0 TFSI

No measurable advantages in the available data.

Cons

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

Choose cars to compare

Brand
Model
Generation
Engine or modification
AUDI A6 Sedan (C8) 40 TDI
AUDI A6 Avant (C9) 2.0 TFSI
Compare selected cars
2 vehicles selected

Popular comparisons

40 TDI
40 TDI
VS
AUDIA6 Sedan (C8)40 TDIvsAUDIA6 Sedan (C8)Facelift 202340 TDI
2.0 TFSI
40 TDI
VS
AUDIA6 Avant (C9)2.0 TFSIvsAUDIA6 Avant (C8)Facelift 202340 TDI
40 TDI
40 TDI
VS
AUDIA6 Sedan (C8)40 TDIvsAUDIA6 Avant (C8)40 TDI
2.0 TFSI
40 TDI
VS
AUDIA6 Avant (C9)2.0 TFSIvsAUDIA6 allroad (C8)40 TDI
40 TDI
2.8 V6 30V
VS
AUDIA6 Sedan (C8)40 TDIvsAUDIA6 (4A/C4)2.8 V6 30V
2.0 TFSI
1.8 TFSI ultra
VS
AUDIA6 Avant (C9)2.0 TFSIvsAUDIA6 Avant (4G/C7)Facelift 20161.8 TFSI ultra
2.0 TFSI
1.8 TFSI ultra
VS
AUDIA6 Avant (C9)2.0 TFSIvsAUDIA6 Avant (4G/C7)Facelift 20141.8 TFSI ultra
40 TDI
2.0 TDI
VS
AUDIA6 Sedan (C8)40 TDIvsAUDIA6 Avant (C9)2.0 TDI
2.0 TFSI
3.0 TDI V6
VS
AUDIA6 Avant (C9)2.0 TFSIvsAUDIA6 allroad (C9)3.0 TDI V6
40 TDI
2.7 V6
VS
AUDIA6 Sedan (C8)40 TDIvsAUDIA6 (4B/C5)Facelift 20012.7 V6
2.0 TFSI
2.8 V6 30V
VS
AUDIA6 Avant (C9)2.0 TFSIvsAUDIA6 Avant (4A/C4)2.8 V6 30V
40 TDI
2.7 T V6
VS
AUDIA6 Sedan (C8)40 TDIvsAUDIA6 (4B/C5)2.7 T V6
AUDI A6 Sedan (C8) 40 TDI vs AUDI A6 Avant (C9) 2.0 TFSI - car comparison - FastVsFaster