Car comparison

AUDI S4 (B9) · Facelift 2019 3.0 TFSI V6vsAUDI A8 (D5) · Facelift 2021 55 TFSI V6

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

New comparison

AUDI S4 (B9) · Facelift 2019

3.0 TFSI V6

354 hp2995 ccGasolineAWDAutomaticTurbochargedSedan2020-2024
VS

AUDI A8 (D5) · Facelift 2021

55 TFSI V6

340 hp2995 ccGasolineAWDAutomaticTurbochargedSedan2021-present

Comparison overview

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

Best choices

AUDI S4 (B9) Facelift 2019 3.0 TFSI V6

  • Quickest 0-100 km/h
    4.7 s
  • Fastest top speed
    265 km/h
    165 mph Unrestricted
    250 km/h
    155 mph Restricted
  • Most powerful
    354 hp
    264 kW
  • Highest torque
    500 Nm
    369 lb-ft
  • Lightest
    1,800 kg
    3,968 lb
  • Best power-to-weight
    197 hp/t
    147 kW/t
    5.1 kg/hp
  • Best overall score
    73/100
  • Best performance score
    72/100

AUDI A8 (D5) Facelift 2021 55 TFSI V6

  • Lowest combined fuel consumption
    8.3 L/100 km
    28.3 mpg US
    34.0 mpg UK
  • Lowest city consumption
    11.3 L/100 km
    20.8 mpg US
    25.0 mpg UK
  • Lowest highway consumption
    6.6 L/100 km
    35.6 mpg US
    42.8 mpg UK
  • Best estimated range
    988 km
    614 mi
  • Largest trunk
    505 L
  • Best economy score
    85/100
  • Best practicality score
    76/100

Specification comparison

Specification comparison
ModelAUDIS4 (B9)Facelift 20193.0 TFSI V6AUDIA8 (D5)Facelift 202155 TFSI V6
Power
354hp264kW
340hp254kW
Torque
500Nm369lb-ft
500Nm369lb-ft
Curb weight
1,800kg3,968lb
1,960kg4,321lb
Gross weight-
2,710kg5,975lb
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Calculated
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Calculated
To 99% top speed
47.0s99% target: 262 km/h / 163 mph
Calculated
58.5s99% target: 262 km/h / 163 mph
Calculated
0-100 km/h
4.7s
5.6s
0-200 km/h
14.1s
Calculated
17.2s
Calculated
0-60 mph
4.5s
Calculated
5.4s
Calculated
Fuel consumption
10.2L/100 km23.1mpg US27.7mpg UK
8.3L/100 km28.3mpg US34.0mpg UK
Fuel consumption city
11.8L/100 km19.9mpg US23.9mpg UK
11.3L/100 km20.8mpg US25.0mpg UK
Fuel consumption highway
8.7L/100 km27mpg US32.5mpg UK
6.6L/100 km35.6mpg US42.8mpg UK
Quarter mile
12.6s
Calculated
13.6s
Calculated
Power-to-weight
197hp/t147kW/t89hp/1000 lb
Calculated
173hp/t129kW/t79hp/1000 lb
Calculated
Torque-to-weight
278Nm/t186lb-ft/ton
Calculated
255Nm/t171lb-ft/ton
Calculated
Estimated range
569km353mi
Calculated
988km614mi
Calculated
Displacement
2,995cc183cu in
2,995cc183cu in
Length
4,770mm188in
5,190mm204in
Width
1,847mm73in
1,945mm77in
Height
1,401mm55in
1,473mm58in
Wheelbase
2,825mm111in
2,998mm118in
Front track
1,565mm62in
1,645mm65in
Rear track
1,546mm61in
1,633mm64in
Trunk volume
460L
505L
Doors
4
4
Seats
5
5
Fuel tank
58L
82L

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 S4 (B9) Facelift 2019 3.0 TFSI V6AUDI A8 (D5) Facelift 2021 55 TFSI V6PowerTorque
  • AUDI S4 (B9) Facelift 2019 3.0 TFSI V6: Power / Torque
  • AUDI A8 (D5) Facelift 2021 55 TFSI V6: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
AUDIS4 (B9)Facelift 20193.0 TFSI V65,400-6,400 rpm1,370-4,500 rpm6,650 rpm
AUDIA8 (D5)Facelift 202155 TFSI V65,000-6,400 rpm1,370-4,500 rpm6,650 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricAUDIS4 (B9)Facelift 20193.0 TFSI V6AUDIA8 (D5)Facelift 202155 TFSI V6
Acceleration checkpoints
0-60 mph
0-97 km/h
4.5 s
5.4 s
0-100 km/h
0-62 mph
4.7 s
5.6 s
0-200 km/h
0-124 mph
14.1 s
17.2 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Limited
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Limited
Drag race simulation
60 ft
18 m
2.3 s
2.5 s
330 ft
101 m
5.7 s
6.1 s
1/8 mile
201 m
8.4 s
9.0 s
1000 ft
305 m
10.7 s
11.5 s
1/4 mile
402 m
12.6 s
13.6 s
Trap speed
1/4 mile
402 m
190 km/h
118 mph
178 km/h
111 mph

Power comparison

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

Chart data table
VehicleValue
AUDIS4 (B9)Facelift 20193.0 TFSI V6
354 hp
264 kW
AUDIA8 (D5)Facelift 202155 TFSI V6
340 hp
254 kW

AUDI S4 (B9) Facelift 2019 3.0 TFSI V6 has 14 hp more than AUDI A8 (D5) Facelift 2021 55 TFSI V6.

The biggest power difference is between AUDI A8 (D5) Facelift 2021 55 TFSI V6 and AUDI S4 (B9) Facelift 2019 3.0 TFSI V6: 14 hp (10 kW).

Torque comparison

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

Chart data table
VehicleValue
AUDIS4 (B9)Facelift 20193.0 TFSI V6
500 Nm
369 lb-ft
AUDIA8 (D5)Facelift 202155 TFSI V6
500 Nm
369 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
AUDIS4 (B9)Facelift 20193.0 TFSI V6
1,800 kg
3,968 lb
AUDIA8 (D5)Facelift 202155 TFSI V6
1,960 kg
4,321 lb

Top speed without limiter comparison

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

Chart data table
VehicleValue
AUDIS4 (B9)Facelift 20193.0 TFSI V6
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
AUDIA8 (D5)Facelift 202155 TFSI V6
Unrestricted
265 km/h165 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
AUDIS4 (B9)Facelift 20193.0 TFSI V64.7 s
AUDIA8 (D5)Facelift 202155 TFSI V65.6 s

The biggest 0-100 km/h difference is between AUDI S4 (B9) Facelift 2019 3.0 TFSI V6 and AUDI A8 (D5) Facelift 2021 55 TFSI V6: 0.9 s.

Fuel consumption comparison

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

Chart data table
VehicleValue
AUDIS4 (B9)Facelift 20193.0 TFSI V6
10.2 L/100 km
23.1 mpg US
27.7 mpg UK
AUDIA8 (D5)Facelift 202155 TFSI V6
8.3 L/100 km
28.3 mpg US
34.0 mpg UK

The biggest fuel consumption difference is between AUDI A8 (D5) Facelift 2021 55 TFSI V6 and AUDI S4 (B9) Facelift 2019 3.0 TFSI V6: 1.9 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
AUDIS4 (B9)Facelift 20193.0 TFSI V6
197 hp/t
147 kW/t
5.1 kg/hp
AUDIA8 (D5)Facelift 202155 TFSI V6
173 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
AUDIS4 (B9)Facelift 20193.0 TFSI V6
569 km
353 mi
AUDIA8 (D5)Facelift 202155 TFSI V6
988 km
614 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
AUDIS4 (B9)Facelift 20193.0 TFSI V6
354 hp
264 kW
4.7 s
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
AUDIA8 (D5)Facelift 202155 TFSI V6
340 hp
254 kW
5.6 s
Unrestricted
265 km/h165 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
AUDIS4 (B9)Facelift 20193.0 TFSI V6
Power
354 hp
264 kW
0-100 km/h4.7 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Doors/seats
4 doors
5 seats
Trunk
460 L
16.2 cu ft
Length
4,770 mm
187.8 in
Height
1,401 mm
55.2 in
AUDIA8 (D5)Facelift 202155 TFSI V6
Power
340 hp
254 kW
0-100 km/h5.6 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Doors/seats
4 doors
5 seats
Trunk
505 L
17.8 cu ft
Length
5,190 mm
204.3 in
Height
1,473 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
AUDIS4 (B9)Facelift 20193.0 TFSI V6
Power
354 hp
264 kW
0-100 km/h4.7 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
10.2 L/100 km
23.1 mpg US
27.7 mpg UK
AUDIA8 (D5)Facelift 202155 TFSI V6
Power
340 hp
254 kW
0-100 km/h5.6 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
8.3 L/100 km
28.3 mpg US
34.0 mpg UK

AUDI A8 (D5) Facelift 2021 55 TFSI V6 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
AUDIS4 (B9)Facelift 20193.0 TFSI V6
10.2 L/100 km
23.1 mpg US
27.7 mpg UK
4.7 s
AUDIA8 (D5)Facelift 202155 TFSI V6
8.3 L/100 km
28.3 mpg US
34.0 mpg UK
5.6 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
AUDIS4 (B9)Facelift 20193.0 TFSI V6
197 hp/t
147 kW/t
5.1 kg/hp
10.2 L/100 km
23.1 mpg US
27.7 mpg UK
AUDIA8 (D5)Facelift 202155 TFSI V6
173 hp/t
129 kW/t
5.8 kg/hp
8.3 L/100 km
28.3 mpg US
34.0 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleAUDIS4 (B9)Facelift 20193.0 TFSI V6AUDIA8 (D5)Facelift 202155 TFSI V6
Power
354 hp
264 kW
340 hp
254 kW
Torque
500 Nm
369 lb-ft
500 Nm
369 lb-ft
Acceleration
4.7 s
5.6 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Lightness
1,800 kg
3,968 lb
1,960 kg
4,321 lb
Fuel consumption
10.2 L/100 km
23.1 mpg US
27.7 mpg UK
8.3 L/100 km
28.3 mpg US
34.0 mpg UK
Practicality
Doors/seats
4 doors
5 seats
Trunk
460 L
16.2 cu ft
Length
4,770 mm
187.8 in
Height
1,401 mm
55.2 in
Doors/seats
4 doors
5 seats
Trunk
505 L
17.8 cu ft
Length
5,190 mm
204.3 in
Height
1,473 mm
58.0 in
Range score
569 km
353 mi
988 km
614 mi
Trunk score
460 L
16.2 cu ft
505 L
17.8 cu ft
Power-to-weight score
197 hp/t
147 kW/t
5.1 kg/hp
173 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 S4 (B9) Facelift 2019 3.0 TFSI V6AUDI A8 (D5) Facelift 2021 55 TFSI V6
Consumption10.2 L/100 km23.1 mpg US27.7 mpg UK8.3 L/100 km28.3 mpg US34 mpg UK
Cost / 100 km17.85 LC100 km14.53 LC100 km
Cost / 100 mi28.73 LC100 mi23.38 LC100 mi
Annual fuel used1,530 L404 US gal337 UK gal1,245 L329 US gal274 UK gal
Annual fuel cost2,678 LC/year2,179 LC/year

Head-to-head comparisons

AUDI S4 (B9) Facelift 2019 3.0 TFSI V6

  • Has 14 hp more
  • Is 160 kg lighter
  • Is 0.9 s quicker from 0-100 km/h
  • Has 23 hp/t better power-to-weight

Pros

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

Cons

  • Highest combined fuel consumption
  • Smallest trunk

AUDI A8 (D5) Facelift 2021 55 TFSI V6

  • Uses 1.9 L/100 km less fuel
  • Has 419 km (261 mi) more estimated range
  • Has 45 L more trunk volume

Pros

  • 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 S4 (B9) 3.0 TFSI V6
AUDI A8 (D5) 55 TFSI V6
Compare selected cars
2 vehicles selected

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AUDI S4 (B9) · Facelift 2019 3.0 TFSI V6 vs AUDI A8 (D5) · Facelift 2021 55 TFSI V6 - car comparison - FastVsFaster