Car comparison

AUDI A8 (D5) · Facelift 2021 55 TFSI V6vsAUDI A8 (D3/4E) · Facelift 2007 4.2 BiTDI V8

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

New comparison

AUDI A8 (D5) · Facelift 2021

55 TFSI V6

340 hp2995 ccGasolineAWDAutomaticTurbochargedSedan2021-present
VS

AUDI A8 (D3/4E) · Facelift 2007

4.2 BiTDI V8

326 hp4134 ccDieselAWDAutomaticTwin-turboSedan2007-2009

Comparison overview

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

Best choices

AUDI A8 (D5) Facelift 2021 55 TFSI V6

  • Quickest 0-100 km/h
    5.6 s
  • Fastest top speed
    265 km/h
    165 mph Unrestricted
    250 km/h
    155 mph Restricted
  • Most powerful
    340 hp
    254 kW
  • Best power-to-weight
    173 hp/t
    129 kW/t
    5.8 kg/hp
  • 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
ModelAUDIA8 (D5)Facelift 202155 TFSI V6AUDIA8 (D3/4E)Facelift 20074.2 BiTDI V8
Power
340hp254kW
326hp243kW
Torque
500Nm369lb-ft
650Nm479lb-ft
Curb weight
1,960kg4,321lb
1,945kg4,288lb
Gross weight
2,710kg5,975lb
2,545kg5,611lb
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
58.5s99% target: 262 km/h / 163 mph
Calculated
61.9s99% target: 262 km/h / 163 mph
Calculated
0-100 km/h
5.6s
5.9s
0-200 km/h
17.2s
Calculated
18.2s
Calculated
0-60 mph
5.4s
Calculated
5.6s
Calculated
Fuel consumption
8.3L/100 km28.3mpg US34.0mpg UK
9.4L/100 km25mpg US30.1mpg UK
Fuel consumption city
11.3L/100 km20.8mpg US25.0mpg UK
13.3L/100 km17.7mpg US21.2mpg UK
Fuel consumption highway
6.6L/100 km35.6mpg US42.8mpg UK
7.2L/100 km32.7mpg US39.2mpg UK
Quarter mile
13.6s
Calculated
13.8s
Calculated
Power-to-weight
173hp/t129kW/t79hp/1000 lb
Calculated
168hp/t125kW/t76hp/1000 lb
Calculated
Torque-to-weight
255Nm/t171lb-ft/ton
Calculated
334Nm/t224lb-ft/ton
Calculated
Estimated range
988km614mi
Calculated
957km595mi
Calculated
Displacement
2,995cc183cu in
4,134cc252cu in
Length
5,190mm204in
5,062mm199in
Width
1,945mm77in
1,894mm75in
Height
1,473mm58in
1,444mm57in
Wheelbase
2,998mm118in
2,944mm116in
Front track
1,645mm65in
1,629mm64in
Rear track
1,633mm64in
1,615mm64in
Trunk volume
505L
500L
Doors
4
4
Seats
5
5
Fuel tank
82L
90L
CO2 emissions-
249g/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 A8 (D5) Facelift 2021 55 TFSI V6AUDI A8 (D3/4E) Facelift 2007 4.2 BiTDI V8PowerTorque
  • AUDI A8 (D5) Facelift 2021 55 TFSI V6: Power / Torque
  • AUDI A8 (D3/4E) Facelift 2007 4.2 BiTDI V8: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
AUDIA8 (D5)Facelift 202155 TFSI V65,000-6,400 rpm1,370-4,500 rpm6,650 rpm
AUDIA8 (D3/4E)Facelift 20074.2 BiTDI V83,750 rpm1,600-3,500 rpm4,000 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricAUDIA8 (D5)Facelift 202155 TFSI V6AUDIA8 (D3/4E)Facelift 20074.2 BiTDI V8
Acceleration checkpoints
0-60 mph
0-97 km/h
5.4 s
5.6 s
0-100 km/h
0-62 mph
5.6 s
5.9 s
0-200 km/h
0-124 mph
17.2 s
18.2 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Limited
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Likely limited
Drag race simulation
60 ft
18 m
2.5 s
2.5 s
330 ft
101 m
6.1 s
6.3 s
1/8 mile
201 m
9.0 s
9.2 s
1000 ft
305 m
11.5 s
11.8 s
1/4 mile
402 m
13.6 s
13.8 s
Trap speed
1/4 mile
402 m
178 km/h
111 mph
175 km/h
109 mph

Power comparison

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

Chart data table
VehicleValue
AUDIA8 (D5)Facelift 202155 TFSI V6
340 hp
254 kW
AUDIA8 (D3/4E)Facelift 20074.2 BiTDI V8
326 hp
243 kW

AUDI A8 (D5) Facelift 2021 55 TFSI V6 has 14 hp more than AUDI A8 (D3/4E) Facelift 2007 4.2 BiTDI V8.

The biggest power difference is between AUDI A8 (D3/4E) Facelift 2007 4.2 BiTDI V8 and AUDI A8 (D5) Facelift 2021 55 TFSI V6: 14 hp (10 kW).

Torque comparison

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

Chart data table
VehicleValue
AUDIA8 (D5)Facelift 202155 TFSI V6
500 Nm
369 lb-ft
AUDIA8 (D3/4E)Facelift 20074.2 BiTDI V8
650 Nm
479 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
AUDIA8 (D5)Facelift 202155 TFSI V6
1,960 kg
4,321 lb
AUDIA8 (D3/4E)Facelift 20074.2 BiTDI V8
1,945 kg
4,288 lb

Top speed without limiter comparison

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

Chart data table
VehicleValue
AUDIA8 (D5)Facelift 202155 TFSI V6
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
AUDIA8 (D3/4E)Facelift 20074.2 BiTDI V8
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
AUDIA8 (D5)Facelift 202155 TFSI V65.6 s
AUDIA8 (D3/4E)Facelift 20074.2 BiTDI V85.9 s

The biggest 0-100 km/h difference is between AUDI A8 (D5) Facelift 2021 55 TFSI V6 and AUDI A8 (D3/4E) Facelift 2007 4.2 BiTDI V8: 0.3 s.

Fuel consumption comparison

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

Chart data table
VehicleValue
AUDIA8 (D5)Facelift 202155 TFSI V6
8.3 L/100 km
28.3 mpg US
34.0 mpg UK
AUDIA8 (D3/4E)Facelift 20074.2 BiTDI V8
9.4 L/100 km
25.0 mpg US
30.1 mpg UK

The biggest fuel consumption difference is between AUDI A8 (D5) Facelift 2021 55 TFSI V6 and AUDI A8 (D3/4E) Facelift 2007 4.2 BiTDI V8: 1.1 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
AUDIA8 (D5)Facelift 202155 TFSI V6
173 hp/t
129 kW/t
5.8 kg/hp
AUDIA8 (D3/4E)Facelift 20074.2 BiTDI V8
168 hp/t
125 kW/t
6.0 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
AUDIA8 (D5)Facelift 202155 TFSI V6
988 km
614 mi
AUDIA8 (D3/4E)Facelift 20074.2 BiTDI V8
957 km
595 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
AUDIA8 (D5)Facelift 202155 TFSI V6
340 hp
254 kW
5.6 s
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
AUDIA8 (D3/4E)Facelift 20074.2 BiTDI V8
326 hp
243 kW
5.9 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
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
AUDIA8 (D3/4E)Facelift 20074.2 BiTDI V8
Power
326 hp
243 kW
0-100 km/h5.9 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Doors/seats
4 doors
5 seats
Trunk
500 L
17.7 cu ft
Length
5,062 mm
199.3 in
Height
1,444 mm
56.9 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
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
AUDIA8 (D3/4E)Facelift 20074.2 BiTDI V8
Power
326 hp
243 kW
0-100 km/h5.9 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
9.4 L/100 km
25.0 mpg US
30.1 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
AUDIA8 (D5)Facelift 202155 TFSI V6
8.3 L/100 km
28.3 mpg US
34.0 mpg UK
5.6 s
AUDIA8 (D3/4E)Facelift 20074.2 BiTDI V8
9.4 L/100 km
25.0 mpg US
30.1 mpg UK
5.9 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
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
AUDIA8 (D3/4E)Facelift 20074.2 BiTDI V8
168 hp/t
125 kW/t
6.0 kg/hp
9.4 L/100 km
25.0 mpg US
30.1 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleAUDIA8 (D5)Facelift 202155 TFSI V6AUDIA8 (D3/4E)Facelift 20074.2 BiTDI V8
Power
340 hp
254 kW
326 hp
243 kW
Torque
500 Nm
369 lb-ft
650 Nm
479 lb-ft
Acceleration
5.6 s
5.9 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Lightness
1,960 kg
4,321 lb
1,945 kg
4,288 lb
Fuel consumption
8.3 L/100 km
28.3 mpg US
34.0 mpg UK
9.4 L/100 km
25.0 mpg US
30.1 mpg UK
Practicality
Doors/seats
4 doors
5 seats
Trunk
505 L
17.8 cu ft
Length
5,190 mm
204.3 in
Height
1,473 mm
58.0 in
Doors/seats
4 doors
5 seats
Trunk
500 L
17.7 cu ft
Length
5,062 mm
199.3 in
Height
1,444 mm
56.9 in
Range score
988 km
614 mi
957 km
595 mi
CO2 score
-
249 g/km
Trunk score
505 L
17.8 cu ft
500 L
17.7 cu ft
Power-to-weight score
173 hp/t
129 kW/t
5.8 kg/hp
168 hp/t
125 kW/t
6.0 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 A8 (D5) Facelift 2021 55 TFSI V6AUDI A8 (D3/4E) Facelift 2007 4.2 BiTDI V8
Consumption8.3 L/100 km28.3 mpg US34 mpg UK9.4 L/100 km25 mpg US30.1 mpg UK
Cost / 100 km14.53 LC100 km16.45 LC100 km
Cost / 100 mi23.38 LC100 mi26.47 LC100 mi
Annual fuel used1,245 L329 US gal274 UK gal1,410 L372 US gal310 UK gal
Annual fuel cost2,179 LC/year2,468 LC/year

Head-to-head comparisons

AUDI A8 (D5) Facelift 2021 55 TFSI V6

  • Has 14 hp more
  • Is 0.3 s quicker from 0-100 km/h
  • Uses 1.1 L/100 km less fuel
  • Has 6 hp/t better power-to-weight
  • Has 31 km (19 mi) more estimated range
  • Has 5 L more trunk volume

Pros

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

Cons

  • Heaviest

Choose cars to compare

Brand
Model
Generation
Engine or modification
AUDI A8 (D5) 55 TFSI V6
AUDI A8 (D3/4E) 4.2 BiTDI V8
Compare selected cars
2 vehicles selected

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AUDI A8 (D5) · Facelift 2021 55 TFSI V6 vs AUDI A8 (D3/4E) · Facelift 2007 4.2 BiTDI V8 - car comparison - FastVsFaster