Car comparison

AUDI A6 (4F/C6) 4.2 FSI V8 40VvsCadillac STS 4.6 i V8

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

New comparison

AUDI A6 (4F/C6)

4.2 FSI V8 40V

350 hp4163 ccGasolineAWDAutomaticNaturally aspiratedSedan2006-2008
VS

Cadillac STS

4.6 i V8

325 hp4565 ccGasolineRWDAutomaticNaturally aspiratedSedan2004-2011

Comparison overview

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

Best choices

AUDI A6 (4F/C6) 4.2 FSI V8 40V

  • 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
    350 hp
    261 kW
  • Highest torque
    440 Nm
    325 lb-ft
  • Lightest
    1,770 kg
    3,902 lb
  • Best power-to-weight
    198 hp/t
    147 kW/t
    5.1 kg/hp
  • Lowest combined fuel consumption
    10.8 L/100 km
    21.8 mpg US
    26.2 mpg UK
  • Lowest city consumption
    15.6 L/100 km
    15.1 mpg US
    18.1 mpg UK
  • Lowest highway consumption
    8.1 L/100 km
    29.0 mpg US
    34.9 mpg UK
  • Lowest CO2 emissions
    257 g/km
  • Best estimated range
    741 km
    460 mi
  • Largest trunk
    546 L
  • Best overall score
    71/100
  • Best performance score
    68/100
  • Best economy score
    78/100
  • Best practicality score
    78/100

Specification comparison

Specification comparison
ModelAUDIA6 (4F/C6)4.2 FSI V8 40VCadillacSTS4.6 i V8
Power
350hp261kW
325hp242kW
Torque
440Nm325lb-ft
420Nm310lb-ft
Curb weight
1,770kg3,902lb
1,780kg3,924lb
Gross weight
2,350kg5,181lb
-
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
59.7s99% target: 262 km/h / 163 mph
Calculated
64.0s99% target: 262 km/h / 163 mph
Calculated
0-100 km/h
5.9s
6.2s
0-200 km/h
17.8s
Calculated
18.9s
Calculated
0-60 mph
5.6s
Calculated
5.9s
Calculated
Fuel consumption
10.8L/100 km21.8mpg US26.2mpg UK
14.4L/100 km16.3mpg US19.6mpg UK
Fuel consumption city
15.6L/100 km15.1mpg US18.1mpg UK
19.2L/100 km12.3mpg US14.7mpg UK
Fuel consumption highway
8.1L/100 km29mpg US34.9mpg UK
11.7L/100 km20.1mpg US24.1mpg UK
Quarter mile
13.8s
Calculated
14.1s
Calculated
Power-to-weight
198hp/t147kW/t90hp/1000 lb
Calculated
183hp/t136kW/t83hp/1000 lb
Calculated
Torque-to-weight
249Nm/t166lb-ft/ton
Calculated
236Nm/t158lb-ft/ton
Calculated
Estimated range
741km460mi
Calculated
458km285mi
Calculated
Displacement
4,163cc254cu in
4,565cc279cu in
Length
4,916mm194in
4,985mm196in
Width
1,855mm73in
1,843mm73in
Height
1,459mm57in
1,464mm58in
Wheelbase
2,843mm112in
2,957mm116in
Front track
1,612mm63in
1,596mm63in
Rear track
1,618mm64in
1,581mm62in
Trunk volume-
464L
Max trunk volume
546L
-
Doors
4
4
Seats
5
5
Fuel tank
80L
66L
CO2 emissions
257g/km
343g/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 (4F/C6) 4.2 FSI V8 40VCadillac STS 4.6 i V8PowerTorque
  • AUDI A6 (4F/C6) 4.2 FSI V8 40V: Power / Torque
  • Cadillac STS 4.6 i V8: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
AUDIA6 (4F/C6)4.2 FSI V8 40V6,800 rpm3,500 rpm7,050 rpm
CadillacSTS4.6 i V86,400 rpm4,400 rpm6,650 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricAUDIA6 (4F/C6)4.2 FSI V8 40VCadillacSTS4.6 i V8
Acceleration checkpoints
0-60 mph
0-97 km/h
5.6 s
5.9 s
0-100 km/h
0-62 mph
5.9 s
6.2 s
0-200 km/h
0-124 mph
17.8 s
18.9 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Likely limited
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Likely limited
Drag race simulation
60 ft
18 m
2.5 s
2.6 s
330 ft
101 m
6.3 s
6.4 s
1/8 mile
201 m
9.3 s
9.5 s
1000 ft
305 m
11.8 s
12.0 s
1/4 mile
402 m
13.8 s
14.1 s
Trap speed
1/4 mile
402 m
176 km/h
110 mph
173 km/h
107 mph

Power comparison

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

Chart data table
VehicleValue
AUDIA6 (4F/C6)4.2 FSI V8 40V
350 hp
261 kW
CadillacSTS4.6 i V8
325 hp
242 kW

AUDI A6 (4F/C6) 4.2 FSI V8 40V has 25 hp more than Cadillac STS 4.6 i V8.

The biggest power difference is between Cadillac STS 4.6 i V8 and AUDI A6 (4F/C6) 4.2 FSI V8 40V: 25 hp (19 kW).

Torque comparison

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

Chart data table
VehicleValue
AUDIA6 (4F/C6)4.2 FSI V8 40V
440 Nm
325 lb-ft
CadillacSTS4.6 i V8
420 Nm
310 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
AUDIA6 (4F/C6)4.2 FSI V8 40V
1,770 kg
3,902 lb
CadillacSTS4.6 i V8
1,780 kg
3,924 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 (4F/C6)4.2 FSI V8 40V
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
CadillacSTS4.6 i 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
AUDIA6 (4F/C6)4.2 FSI V8 40V5.9 s
CadillacSTS4.6 i V86.2 s

The biggest 0-100 km/h difference is between AUDI A6 (4F/C6) 4.2 FSI V8 40V and Cadillac STS 4.6 i 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
AUDIA6 (4F/C6)4.2 FSI V8 40V
10.8 L/100 km
21.8 mpg US
26.2 mpg UK
CadillacSTS4.6 i V8
14.4 L/100 km
16.3 mpg US
19.6 mpg UK

The biggest fuel consumption difference is between AUDI A6 (4F/C6) 4.2 FSI V8 40V and Cadillac STS 4.6 i V8: 3.6 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 (4F/C6)4.2 FSI V8 40V
198 hp/t
147 kW/t
5.1 kg/hp
CadillacSTS4.6 i V8
183 hp/t
136 kW/t
5.5 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
AUDIA6 (4F/C6)4.2 FSI V8 40V
741 km
460 mi
CadillacSTS4.6 i V8
458 km
285 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
AUDIA6 (4F/C6)4.2 FSI V8 40V
350 hp
261 kW
5.9 s
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
CadillacSTS4.6 i V8
325 hp
242 kW
6.2 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
AUDIA6 (4F/C6)4.2 FSI V8 40V
Power
350 hp
261 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
546 L
19.3 cu ft
Length
4,916 mm
193.5 in
Height
1,459 mm
57.4 in
CadillacSTS4.6 i V8
Power
325 hp
242 kW
0-100 km/h6.2 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Doors/seats
4 doors
5 seats
Trunk
464 L
16.4 cu ft
Length
4,985 mm
196.3 in
Height
1,464 mm
57.6 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 (4F/C6)4.2 FSI V8 40V
Power
350 hp
261 kW
0-100 km/h5.9 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
CadillacSTS4.6 i V8
Power
325 hp
242 kW
0-100 km/h6.2 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
14.4 L/100 km
16.3 mpg US
19.6 mpg UK

AUDI A6 (4F/C6) 4.2 FSI V8 40V 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 (4F/C6)4.2 FSI V8 40V
10.8 L/100 km
21.8 mpg US
26.2 mpg UK
5.9 s
CadillacSTS4.6 i V8
14.4 L/100 km
16.3 mpg US
19.6 mpg UK
6.2 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 (4F/C6)4.2 FSI V8 40V
198 hp/t
147 kW/t
5.1 kg/hp
10.8 L/100 km
21.8 mpg US
26.2 mpg UK
CadillacSTS4.6 i V8
183 hp/t
136 kW/t
5.5 kg/hp
14.4 L/100 km
16.3 mpg US
19.6 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleAUDIA6 (4F/C6)4.2 FSI V8 40VCadillacSTS4.6 i V8
Power
350 hp
261 kW
325 hp
242 kW
Torque
440 Nm
325 lb-ft
420 Nm
310 lb-ft
Acceleration
5.9 s
6.2 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Lightness
1,770 kg
3,902 lb
1,780 kg
3,924 lb
Fuel consumption
10.8 L/100 km
21.8 mpg US
26.2 mpg UK
14.4 L/100 km
16.3 mpg US
19.6 mpg UK
Practicality
Doors/seats
4 doors
5 seats
Trunk
546 L
19.3 cu ft
Length
4,916 mm
193.5 in
Height
1,459 mm
57.4 in
Doors/seats
4 doors
5 seats
Trunk
464 L
16.4 cu ft
Length
4,985 mm
196.3 in
Height
1,464 mm
57.6 in
Range score
741 km
460 mi
458 km
285 mi
CO2 score
257 g/km
343 g/km
Trunk score
546 L
19.3 cu ft
464 L
16.4 cu ft
Power-to-weight score
198 hp/t
147 kW/t
5.1 kg/hp
183 hp/t
136 kW/t
5.5 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 A6 (4F/C6) 4.2 FSI V8 40VCadillac STS 4.6 i V8
Consumption10.8 L/100 km21.8 mpg US26.2 mpg UK14.4 L/100 km16.3 mpg US19.6 mpg UK
Cost / 100 km18.90 LC100 km25.20 LC100 km
Cost / 100 mi30.42 LC100 mi40.56 LC100 mi
Annual fuel used1,620 L428 US gal356 UK gal2,160 L571 US gal475 UK gal
Annual fuel cost2,835 LC/year3,780 LC/year

Head-to-head comparisons

AUDI A6 (4F/C6) 4.2 FSI V8 40V

  • Has 25 hp more
  • Has 20 Nm more
  • Is 10 kg lighter
  • Is 0.3 s quicker from 0-100 km/h
  • Uses 3.6 L/100 km less fuel
  • Has 15 hp/t better power-to-weight
  • Has 282 km (175 mi) more estimated range
  • Has 82 L more trunk volume
  • Emits 86 g/km less CO2

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

Cadillac STS 4.6 i V8

No measurable advantages in the available data.

Cons

  • Slowest 0-100 km/h
  • Lowest power
  • Highest combined fuel consumption
  • Heaviest
  • Smallest trunk
  • Highest CO2 emissions

Choose cars to compare

Brand
Model
Generation
Engine or modification
AUDI A6 (4F/C6) 4.2 FSI V8 40V
Cadillac STS 4.6 i V8
Compare selected cars
2 vehicles selected

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