Car comparison

AUDI S8 (D5) · Facelift 2021 4.0 TFSI V8vsRolls-Royce Phantom VIII 6.7 V12

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

New comparison

AUDI S8 (D5) · Facelift 2021

4.0 TFSI V8

571 hp3996 ccGasolineAWDAutomaticTwin-turboSedan2021-present
VS

Rolls-Royce Phantom VIII

6.7 V12

571 hp6749 ccGasolineRWDAutomaticTwin-turboSedan2017-present

Comparison overview

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

Best choices

AUDI S8 (D5) Facelift 2021 4.0 TFSI V8

  • Quickest 0-100 km/h
    3.8 s
  • Fastest top speed
    265 km/h
    165 mph Unrestricted
    250 km/h
    155 mph Restricted
  • Most powerful
    571 hp
    426 kW
  • Lightest
    2,220 kg
    4,894 lb
  • Best power-to-weight
    257 hp/t
    192 kW/t
    3.9 kg/hp
  • Lowest combined fuel consumption
    10.8 L/100 km
    21.8 mpg US
    26.2 mpg UK
  • Lowest city consumption
    15.1 L/100 km
    15.6 mpg US
    18.7 mpg UK
  • Lowest highway consumption
    8.2 L/100 km
    28.7 mpg US
    34.4 mpg UK
  • Best overall score
    82/100
  • Best performance score
    85/100
  • Best economy score
    78/100
  • Best practicality score
    76/100

Specification comparison

Specification comparison
ModelAUDIS8 (D5)Facelift 20214.0 TFSI V8Rolls-RoycePhantom VIII6.7 V12
Power
571hp426kW
571hp426kW
Torque
800Nm590lb-ft
900Nm664lb-ft
Curb weight
2,220kg4,894lb
2,560kg5,644lb
Gross weight
2,835kg6,250lb
-
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
36.7s99% target: 262 km/h / 163 mph
Calculated
57.3s99% target: 262 km/h / 163 mph
Calculated
0-100 km/h
3.8s
5.3s
0-200 km/h
11.2s
Calculated
16.6s
Calculated
0-60 mph
3.6s
Calculated
5.1s
Calculated
Fuel consumption
10.8L/100 km21.8mpg US26.2mpg UK
13.9L/100 km16.9mpg US20.3mpg UK
Fuel consumption city
15.1L/100 km15.6mpg US18.7mpg UK
21.3L/100 km11mpg US13.3mpg UK
Fuel consumption highway
8.2L/100 km28.7mpg US34.4mpg UK
9.7L/100 km24.2mpg US29.1mpg UK
Quarter mile
11.6s
Calculated
13.3s
Calculated
Power-to-weight
257hp/t192kW/t117hp/1000 lb
Calculated
223hp/t166kW/t101hp/1000 lb
Calculated
Torque-to-weight
360Nm/t241lb-ft/ton
Calculated
352Nm/t235lb-ft/ton
Calculated
Estimated range
759km472mi
Calculated
-
Displacement
3,996cc244cu in
6,749cc412cu in
Length
5,190mm204in
5,762mm227in
Width
1,945mm77in
2,018mm79in
Height
1,475mm58in
1,646mm65in
Wheelbase
2,998mm118in
3,552mm140in
Front track
1,629mm64in
-
Rear track
1,614mm64in
-
Trunk volume
505L
548L
Doors
4
4
Seats
5
4
Fuel tank
82L
-
CO2 emissions-
318g/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 S8 (D5) Facelift 2021 4.0 TFSI V8Rolls-Royce Phantom VIII 6.7 V12PowerTorque
  • AUDI S8 (D5) Facelift 2021 4.0 TFSI V8: Power / Torque
  • Rolls-Royce Phantom VIII 6.7 V12: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
AUDIS8 (D5)Facelift 20214.0 TFSI V86,000 rpm2,050-4,500 rpm6,250 rpm
Rolls-RoycePhantom VIII6.7 V125,000 rpm1,700 rpm5,250 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricAUDIS8 (D5)Facelift 20214.0 TFSI V8Rolls-RoycePhantom VIII6.7 V12
Acceleration checkpoints
0-60 mph
0-97 km/h
3.6 s
5.1 s
0-100 km/h
0-62 mph
3.8 s
5.3 s
0-200 km/h
0-124 mph
11.2 s
16.6 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Limited
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Likely limited
Drag race simulation
60 ft
18 m
2.1 s
2.4 s
330 ft
101 m
5.2 s
6.0 s
1/8 mile
201 m
7.7 s
8.8 s
1000 ft
305 m
9.8 s
11.3 s
1/4 mile
402 m
11.6 s
13.3 s
Trap speed
1/4 mile
402 m
203 km/h
126 mph
180 km/h
112 mph

Power comparison

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

Chart data table
VehicleValue
AUDIS8 (D5)Facelift 20214.0 TFSI V8
571 hp
426 kW
Rolls-RoycePhantom VIII6.7 V12
571 hp
426 kW

Torque comparison

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

Chart data table
VehicleValue
AUDIS8 (D5)Facelift 20214.0 TFSI V8
800 Nm
590 lb-ft
Rolls-RoycePhantom VIII6.7 V12
900 Nm
664 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
AUDIS8 (D5)Facelift 20214.0 TFSI V8
2,220 kg
4,894 lb
Rolls-RoycePhantom VIII6.7 V12
2,560 kg
5,644 lb

Top speed without limiter comparison

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

Chart data table
VehicleValue
AUDIS8 (D5)Facelift 20214.0 TFSI V8
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Rolls-RoycePhantom VIII6.7 V12
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
AUDIS8 (D5)Facelift 20214.0 TFSI V83.8 s
Rolls-RoycePhantom VIII6.7 V125.3 s

The biggest 0-100 km/h difference is between AUDI S8 (D5) Facelift 2021 4.0 TFSI V8 and Rolls-Royce Phantom VIII 6.7 V12: 1.5 s.

Fuel consumption comparison

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

Chart data table
VehicleValue
AUDIS8 (D5)Facelift 20214.0 TFSI V8
10.8 L/100 km
21.8 mpg US
26.2 mpg UK
Rolls-RoycePhantom VIII6.7 V12
13.9 L/100 km
16.9 mpg US
20.3 mpg UK

The biggest fuel consumption difference is between AUDI S8 (D5) Facelift 2021 4.0 TFSI V8 and Rolls-Royce Phantom VIII 6.7 V12: 3.1 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
AUDIS8 (D5)Facelift 20214.0 TFSI V8
257 hp/t
192 kW/t
3.9 kg/hp
Rolls-RoycePhantom VIII6.7 V12
223 hp/t
166 kW/t
4.5 kg/hp

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
AUDIS8 (D5)Facelift 20214.0 TFSI V8
571 hp
426 kW
3.8 s
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Rolls-RoycePhantom VIII6.7 V12
571 hp
426 kW
5.3 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
AUDIS8 (D5)Facelift 20214.0 TFSI V8
Power
571 hp
426 kW
0-100 km/h3.8 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
1,475 mm
58.1 in
Rolls-RoycePhantom VIII6.7 V12
Power
571 hp
426 kW
0-100 km/h5.3 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Doors/seats
4 doors
4 seats
Trunk
548 L
19.4 cu ft
Length
5,762 mm
226.9 in
Height
1,646 mm
64.8 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
AUDIS8 (D5)Facelift 20214.0 TFSI V8
Power
571 hp
426 kW
0-100 km/h3.8 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
10.8 L/100 km
21.8 mpg US
26.2 mpg UK
Rolls-RoycePhantom VIII6.7 V12
Power
571 hp
426 kW
0-100 km/h5.3 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
13.9 L/100 km
16.9 mpg US
20.3 mpg UK

AUDI S8 (D5) Facelift 2021 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
AUDIS8 (D5)Facelift 20214.0 TFSI V8
10.8 L/100 km
21.8 mpg US
26.2 mpg UK
3.8 s
Rolls-RoycePhantom VIII6.7 V12
13.9 L/100 km
16.9 mpg US
20.3 mpg UK
5.3 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
AUDIS8 (D5)Facelift 20214.0 TFSI V8
257 hp/t
192 kW/t
3.9 kg/hp
10.8 L/100 km
21.8 mpg US
26.2 mpg UK
Rolls-RoycePhantom VIII6.7 V12
223 hp/t
166 kW/t
4.5 kg/hp
13.9 L/100 km
16.9 mpg US
20.3 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleAUDIS8 (D5)Facelift 20214.0 TFSI V8Rolls-RoycePhantom VIII6.7 V12
Power
571 hp
426 kW
571 hp
426 kW
Torque
800 Nm
590 lb-ft
900 Nm
664 lb-ft
Acceleration
3.8 s
5.3 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Lightness
2,220 kg
4,894 lb
2,560 kg
5,644 lb
Fuel consumption
10.8 L/100 km
21.8 mpg US
26.2 mpg UK
13.9 L/100 km
16.9 mpg US
20.3 mpg UK
Practicality
Doors/seats
4 doors
5 seats
Trunk
505 L
17.8 cu ft
Length
5,190 mm
204.3 in
Height
1,475 mm
58.1 in
Doors/seats
4 doors
4 seats
Trunk
548 L
19.4 cu ft
Length
5,762 mm
226.9 in
Height
1,646 mm
64.8 in
Range score
759 km
472 mi
-
CO2 score
-
318 g/km
Trunk score
505 L
17.8 cu ft
548 L
19.4 cu ft
Power-to-weight score
257 hp/t
192 kW/t
3.9 kg/hp
223 hp/t
166 kW/t
4.5 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 S8 (D5) Facelift 2021 4.0 TFSI V8Rolls-Royce Phantom VIII 6.7 V12
Consumption10.8 L/100 km21.8 mpg US26.2 mpg UK13.9 L/100 km16.9 mpg US20.3 mpg UK
Cost / 100 km18.90 LC100 km24.33 LC100 km
Cost / 100 mi30.42 LC100 mi39.15 LC100 mi
Annual fuel used1,620 L428 US gal356 UK gal2,085 L551 US gal459 UK gal
Annual fuel cost2,835 LC/year3,649 LC/year

Head-to-head comparisons

AUDI S8 (D5) Facelift 2021 4.0 TFSI V8

  • Is 340 kg lighter
  • Is 1.5 s quicker from 0-100 km/h
  • Uses 3.1 L/100 km less fuel
  • Has 34 hp/t better power-to-weight

Pros

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

Cons

  • Smallest trunk

Rolls-Royce Phantom VIII 6.7 V12

  • Has 100 Nm more
  • Has 43 L more trunk volume

Pros

  • Highest torque
  • Largest trunk

Cons

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

Choose cars to compare

Brand
Model
Generation
Engine or modification
AUDI S8 (D5) 4.0 TFSI V8
Rolls-Royce Phantom VIII 6.7 V12
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