Car comparison

AUDI A8 (D3/4E) · Facelift 2005 4.2 BiTDI V8vsAUDI A8 (D5) · Facelift 2021 50 TDI V6

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

New comparison

AUDI A8 (D3/4E) · Facelift 2005

4.2 BiTDI V8

326 hp4134 ccDieselAWDAutomaticTwin-turboSedan2005-2007
VS

AUDI A8 (D5) · Facelift 2021

50 TDI V6

286 hp2967 ccDieselAWDAutomaticTurbochargedSedan2021-present

Comparison overview

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

Best choices

AUDI A8 (D3/4E) Facelift 2005 4.2 BiTDI V8

  • Quickest 0-100 km/h
    5.9 s
  • Fastest top speed
    265 km/h
    165 mph Unrestricted
    250 km/h
    155 mph Restricted
  • Most powerful
    326 hp
    243 kW
  • Highest torque
    650 Nm
    479 lb-ft
  • Lightest
    1,945 kg
    4,288 lb
  • Best power-to-weight
    168 hp/t
    125 kW/t
    6.0 kg/hp
  • Best overall score
    72/100
  • Best performance score
    70/100
  • Best practicality score
    76/100

AUDI A8 (D5) Facelift 2021 50 TDI V6

  • Lowest combined fuel consumption
    6.7 L/100 km
    35.1 mpg US
    42.2 mpg UK
  • Lowest city consumption
    8.8 L/100 km
    26.7 mpg US
    32.1 mpg UK
  • Lowest highway consumption
    5.5 L/100 km
    42.8 mpg US
    51.4 mpg UK
  • Best estimated range
    1,224 km
    760 mi
  • Largest trunk
    505 L
  • Best economy score
    89/100

Specification comparison

Specification comparison
ModelAUDIA8 (D3/4E)Facelift 20054.2 BiTDI V8AUDIA8 (D5)Facelift 202150 TDI V6
Power
326hp243kW
286hp213kW
Torque
650Nm479lb-ft
600Nm443lb-ft
Curb weight
1,945kg4,288lb
2,020kg4,453lb
Gross weight
2,545kg5,611lb
2,710kg5,975lb
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Calculated
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Calculated
To 99% top speed
61.9s99% target: 262 km/h / 163 mph
Calculated
63.3s99% target: 257 km/h / 160 mph
Calculated
0-100 km/h
5.9s
5.9s
0-200 km/h
18.2s
Calculated
18.9s
Calculated
0-60 mph
5.6s
Calculated
5.6s
Calculated
Fuel consumption
9.6L/100 km24.5mpg US29.4mpg UK
6.7L/100 km35.1mpg US42.2mpg UK
Fuel consumption city
13.5L/100 km17.4mpg US20.9mpg UK
8.8L/100 km26.7mpg US32.1mpg UK
Fuel consumption highway
7.3L/100 km32.2mpg US38.7mpg UK
5.5L/100 km42.8mpg US51.4mpg UK
Quarter mile
13.8s
Calculated
13.9s
Calculated
Power-to-weight
168hp/t125kW/t76hp/1000 lb
Calculated
142hp/t106kW/t64hp/1000 lb
Calculated
Torque-to-weight
334Nm/t224lb-ft/ton
Calculated
297Nm/t199lb-ft/ton
Calculated
Estimated range
938km583mi
Calculated
1,224km760mi
Calculated
Displacement
4,134cc252cu in
2,967cc181cu in
Length
5,062mm199in
5,190mm204in
Width
1,894mm75in
1,945mm77in
Height
1,444mm57in
1,473mm58in
Wheelbase
2,944mm116in
2,998mm118in
Front track
1,629mm64in
1,645mm65in
Rear track
1,615mm64in
1,633mm64in
Trunk volume
500L
505L
Doors
4
4
Seats
5
5
Fuel tank
90L
82L
CO2 emissions
258g/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 (D3/4E) Facelift 2005 4.2 BiTDI V8AUDI A8 (D5) Facelift 2021 50 TDI V6PowerTorque
  • AUDI A8 (D3/4E) Facelift 2005 4.2 BiTDI V8: Power / Torque
  • AUDI A8 (D5) Facelift 2021 50 TDI V6: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
AUDIA8 (D3/4E)Facelift 20054.2 BiTDI V83,750 rpm1,600-3,500 rpm4,000 rpm
AUDIA8 (D5)Facelift 202150 TDI V63,500-4,000 rpm1,750-3,250 rpm4,250 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricAUDIA8 (D3/4E)Facelift 20054.2 BiTDI V8AUDIA8 (D5)Facelift 202150 TDI V6
Acceleration checkpoints
0-60 mph
0-97 km/h
5.6 s
5.6 s
0-100 km/h
0-62 mph
5.9 s
5.9 s
0-200 km/h
0-124 mph
18.2 s
18.9 s
Top speed
Unrestricted
265 km/h165 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
2.5 s
2.5 s
330 ft
101 m
6.3 s
6.3 s
1/8 mile
201 m
9.2 s
9.2 s
1000 ft
305 m
11.8 s
11.8 s
1/4 mile
402 m
13.8 s
13.9 s
Trap speed
1/4 mile
402 m
175 km/h
109 mph
173 km/h
107 mph

Power comparison

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

Chart data table
VehicleValue
AUDIA8 (D3/4E)Facelift 20054.2 BiTDI V8
326 hp
243 kW
AUDIA8 (D5)Facelift 202150 TDI V6
286 hp
213 kW

AUDI A8 (D3/4E) Facelift 2005 4.2 BiTDI V8 has 40 hp more than AUDI A8 (D5) Facelift 2021 50 TDI V6.

The biggest power difference is between AUDI A8 (D5) Facelift 2021 50 TDI V6 and AUDI A8 (D3/4E) Facelift 2005 4.2 BiTDI V8: 40 hp (30 kW).

Torque comparison

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

Chart data table
VehicleValue
AUDIA8 (D3/4E)Facelift 20054.2 BiTDI V8
650 Nm
479 lb-ft
AUDIA8 (D5)Facelift 202150 TDI V6
600 Nm
443 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
AUDIA8 (D3/4E)Facelift 20054.2 BiTDI V8
1,945 kg
4,288 lb
AUDIA8 (D5)Facelift 202150 TDI V6
2,020 kg
4,453 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 (D3/4E)Facelift 20054.2 BiTDI V8
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
AUDIA8 (D5)Facelift 202150 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
AUDIA8 (D3/4E)Facelift 20054.2 BiTDI V85.9 s
AUDIA8 (D5)Facelift 202150 TDI V65.9 s

Fuel consumption comparison

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

Chart data table
VehicleValue
AUDIA8 (D3/4E)Facelift 20054.2 BiTDI V8
9.6 L/100 km
24.5 mpg US
29.4 mpg UK
AUDIA8 (D5)Facelift 202150 TDI V6
6.7 L/100 km
35.1 mpg US
42.2 mpg UK

The biggest fuel consumption difference is between AUDI A8 (D5) Facelift 2021 50 TDI V6 and AUDI A8 (D3/4E) Facelift 2005 4.2 BiTDI V8: 2.9 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
AUDIA8 (D3/4E)Facelift 20054.2 BiTDI V8
168 hp/t
125 kW/t
6.0 kg/hp
AUDIA8 (D5)Facelift 202150 TDI V6
142 hp/t
106 kW/t
7.1 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
AUDIA8 (D3/4E)Facelift 20054.2 BiTDI V8
938 km
583 mi
AUDIA8 (D5)Facelift 202150 TDI V6
1,224 km
760 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
AUDIA8 (D3/4E)Facelift 20054.2 BiTDI V8
326 hp
243 kW
5.9 s
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
AUDIA8 (D5)Facelift 202150 TDI V6
286 hp
213 kW
5.9 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
AUDIA8 (D3/4E)Facelift 20054.2 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
AUDIA8 (D5)Facelift 202150 TDI V6
Power
286 hp
213 kW
0-100 km/h5.9 s
Top speed
Unrestricted
260 km/h162 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
AUDIA8 (D3/4E)Facelift 20054.2 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
9.6 L/100 km
24.5 mpg US
29.4 mpg UK
AUDIA8 (D5)Facelift 202150 TDI V6
Power
286 hp
213 kW
0-100 km/h5.9 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
6.7 L/100 km
35.1 mpg US
42.2 mpg UK

AUDI A8 (D5) Facelift 2021 50 TDI 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 (D3/4E)Facelift 20054.2 BiTDI V8
9.6 L/100 km
24.5 mpg US
29.4 mpg UK
5.9 s
AUDIA8 (D5)Facelift 202150 TDI V6
6.7 L/100 km
35.1 mpg US
42.2 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 (D3/4E)Facelift 20054.2 BiTDI V8
168 hp/t
125 kW/t
6.0 kg/hp
9.6 L/100 km
24.5 mpg US
29.4 mpg UK
AUDIA8 (D5)Facelift 202150 TDI V6
142 hp/t
106 kW/t
7.1 kg/hp
6.7 L/100 km
35.1 mpg US
42.2 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleAUDIA8 (D3/4E)Facelift 20054.2 BiTDI V8AUDIA8 (D5)Facelift 202150 TDI V6
Power
326 hp
243 kW
286 hp
213 kW
Torque
650 Nm
479 lb-ft
600 Nm
443 lb-ft
Acceleration
5.9 s
5.9 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Lightness
1,945 kg
4,288 lb
2,020 kg
4,453 lb
Fuel consumption
9.6 L/100 km
24.5 mpg US
29.4 mpg UK
6.7 L/100 km
35.1 mpg US
42.2 mpg UK
Practicality
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
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
938 km
583 mi
1,224 km
760 mi
CO2 score
258 g/km
-
Trunk score
500 L
17.7 cu ft
505 L
17.8 cu ft
Power-to-weight score
168 hp/t
125 kW/t
6.0 kg/hp
142 hp/t
106 kW/t
7.1 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 (D3/4E) Facelift 2005 4.2 BiTDI V8AUDI A8 (D5) Facelift 2021 50 TDI V6
Consumption9.6 L/100 km24.5 mpg US29.4 mpg UK6.7 L/100 km35.1 mpg US42.2 mpg UK
Cost / 100 km16.80 LC100 km11.73 LC100 km
Cost / 100 mi27.04 LC100 mi18.87 LC100 mi
Annual fuel used1,440 L380 US gal317 UK gal1,005 L265 US gal221 UK gal
Annual fuel cost2,520 LC/year1,759 LC/year

Head-to-head comparisons

AUDI A8 (D3/4E) Facelift 2005 4.2 BiTDI V8

  • Has 40 hp more
  • Has 50 Nm more
  • Is 75 kg lighter
  • Has 5 km/h (3 mph) higher top speed
  • Has 26 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 50 TDI V6

  • Uses 2.9 L/100 km less fuel
  • Has 286 km (178 mi) more estimated range
  • Has 5 L more trunk volume

Pros

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

Cons

  • Lowest power
  • Heaviest
  • Lowest top speed

Choose cars to compare

Brand
Model
Generation
Engine or modification
AUDI A8 (D3/4E) 4.2 BiTDI V8
AUDI A8 (D5) 50 TDI V6
Compare selected cars
2 vehicles selected

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