Car comparison

Cadillac CTS I V 5.7 i V8vsMercedes-Benz S-class (W221) S 500

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

New comparison

Cadillac CTS I

V 5.7 i V8

405 hp5665 ccGasolineRWDManualNaturally aspiratedSedan2004-2007
VS

Mercedes-Benz S-class (W221)

S 500

388 hp5461 ccGasolineRWDAutomaticNaturally aspiratedSedan2005-2009

Comparison overview

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

Best choices

Cadillac CTS I V 5.7 i V8

  • Quickest 0-100 km/h
    4.6 s
  • Fastest top speed
    265 km/h
    165 mph Unrestricted
    250 km/h
    155 mph Restricted
  • Most powerful
    405 hp
    302 kW
  • Highest torque
    536 Nm
    395 lb-ft
  • Lightest
    1,745 kg
    3,847 lb
  • Best power-to-weight
    232 hp/t
    173 kW/t
    4.3 kg/hp
  • Best performance score
    75/100

Mercedes-Benz S-class (W221) S 500

  • Lowest city consumption
    17.6 L/100 km
    13.4 mpg US
    16.1 mpg UK
  • Lowest highway consumption
    8.7 L/100 km
    27.0 mpg US
    32.5 mpg UK
  • Largest trunk
    560 L
  • Best overall score
    75/100
  • Best economy score
    75/100
  • Best practicality score
    78/100

Specification comparison

Specification comparison
ModelCadillacCTS IV 5.7 i V8Mercedes-BenzS-class (W221)S 500
Power
405hp302kW
388hp289kW
Torque
536Nm395lb-ft
530Nm391lb-ft
Curb weight
1,745kg3,847lb
1,865kg4,112lb
Gross weight-
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
46.5s99% target: 262 km/h / 163 mph
Calculated
52.3s99% target: 262 km/h / 163 mph
Calculated
0-100 km/h
4.6s
5.4s
0-200 km/h
13.9s
Calculated
16.0s
Calculated
0-60 mph
4.4s
Calculated
5.2s
Calculated
Fuel consumption-
11.9L/100 km19.8mpg US23.7mpg UK
Fuel consumption city
18L/100 km13.1mpg US15.7mpg UK
17.6L/100 km13.4mpg US16.1mpg UK
Fuel consumption highway
9L/100 km26.1mpg US31.4mpg UK
8.7L/100 km27mpg US32.5mpg UK
Quarter mile
12.5s
Calculated
13.3s
Calculated
Power-to-weight
232hp/t173kW/t105hp/1000 lb
Calculated
208hp/t155kW/t94hp/1000 lb
Calculated
Torque-to-weight
307Nm/t206lb-ft/ton
Calculated
284Nm/t190lb-ft/ton
Calculated
Estimated range-
756km470mi
Calculated
Displacement
5,665cc346cu in
5,461cc333cu in
Length
4,865mm192in
5,079mm200in
Width
1,793mm71in
1,872mm74in
Height
1,455mm57in
1,473mm58in
Wheelbase
2,880mm113in
3,035mm119in
Front track
1,555mm61in
1,604mm63in
Rear track
1,560mm61in
1,606mm63in
Trunk volume
360L
560L
Max trunk volume
430L
-
Doors
4
4
Seats
5
5
Fuel tank
66L
90L
CO2 emissions-
283g/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.

Cadillac CTS I V 5.7 i V8Mercedes-Benz S-class (W221) S 500PowerTorque
  • Cadillac CTS I V 5.7 i V8: Power / Torque
  • Mercedes-Benz S-class (W221) S 500: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
CadillacCTS IV 5.7 i V86,000 rpm4,800 rpm6,250 rpm
Mercedes-BenzS-class (W221)S 5006,000 rpm2,800 rpm6,250 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricCadillacCTS IV 5.7 i V8Mercedes-BenzS-class (W221)S 500
Acceleration checkpoints
0-60 mph
0-97 km/h
4.4 s
5.2 s
0-100 km/h
0-62 mph
4.6 s
5.4 s
0-200 km/h
0-124 mph
13.9 s
16.0 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
2.3 s
2.5 s
330 ft
101 m
5.6 s
6.1 s
1/8 mile
201 m
8.3 s
8.9 s
1000 ft
305 m
10.6 s
11.3 s
1/4 mile
402 m
12.5 s
13.3 s
Trap speed
1/4 mile
402 m
190 km/h
118 mph
183 km/h
114 mph

Power comparison

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

Chart data table
VehicleValue
CadillacCTS IV 5.7 i V8
405 hp
302 kW
Mercedes-BenzS-class (W221)S 500
388 hp
289 kW

Cadillac CTS I V 5.7 i V8 has 17 hp more than Mercedes-Benz S-class (W221) S 500.

The biggest power difference is between Mercedes-Benz S-class (W221) S 500 and Cadillac CTS I V 5.7 i V8: 17 hp (13 kW).

Torque comparison

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

Chart data table
VehicleValue
CadillacCTS IV 5.7 i V8
536 Nm
395 lb-ft
Mercedes-BenzS-class (W221)S 500
530 Nm
391 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
CadillacCTS IV 5.7 i V8
1,745 kg
3,847 lb
Mercedes-BenzS-class (W221)S 500
1,865 kg
4,112 lb

Top speed without limiter comparison

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

Chart data table
VehicleValue
CadillacCTS IV 5.7 i V8
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Mercedes-BenzS-class (W221)S 500
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
CadillacCTS IV 5.7 i V84.6 s
Mercedes-BenzS-class (W221)S 5005.4 s

The biggest 0-100 km/h difference is between Cadillac CTS I V 5.7 i V8 and Mercedes-Benz S-class (W221) S 500: 0.8 s.

Power-to-weight comparison

Bar comparison chart for Power-to-weight. Higher is better · hp/t / kW/t

Chart data table
VehicleValue
CadillacCTS IV 5.7 i V8
232 hp/t
173 kW/t
4.3 kg/hp
Mercedes-BenzS-class (W221)S 500
208 hp/t
155 kW/t
4.8 kg/hp

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
CadillacCTS IV 5.7 i V8
405 hp
302 kW
4.6 s
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Mercedes-BenzS-class (W221)S 500
388 hp
289 kW
5.4 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
CadillacCTS IV 5.7 i V8
Power
405 hp
302 kW
0-100 km/h4.6 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Doors/seats
4 doors
5 seats
Trunk
360 L
12.7 cu ft
Length
4,865 mm
191.5 in
Height
1,455 mm
57.3 in
Mercedes-BenzS-class (W221)S 500
Power
388 hp
289 kW
0-100 km/h5.4 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Doors/seats
4 doors
5 seats
Trunk
560 L
19.8 cu ft
Length
5,079 mm
200.0 in
Height
1,473 mm
58.0 in

Detailed score breakdown

Detailed score breakdown
VehicleCadillacCTS IV 5.7 i V8Mercedes-BenzS-class (W221)S 500
Power
405 hp
302 kW
388 hp
289 kW
Torque
536 Nm
395 lb-ft
530 Nm
391 lb-ft
Acceleration
4.6 s
5.4 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Lightness
1,745 kg
3,847 lb
1,865 kg
4,112 lb
Fuel consumption
-
11.9 L/100 km
19.8 mpg US
23.7 mpg UK
Practicality
Doors/seats
4 doors
5 seats
Trunk
360 L
12.7 cu ft
Length
4,865 mm
191.5 in
Height
1,455 mm
57.3 in
Doors/seats
4 doors
5 seats
Trunk
560 L
19.8 cu ft
Length
5,079 mm
200.0 in
Height
1,473 mm
58.0 in
Range score
-
756 km
470 mi
CO2 score
-
283 g/km
Trunk score
360 L
12.7 cu ft
560 L
19.8 cu ft
Power-to-weight score
232 hp/t
173 kW/t
4.3 kg/hp
208 hp/t
155 kW/t
4.8 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
VehicleMercedes-Benz S-class (W221) S 500
Consumption11.9 L/100 km19.8 mpg US23.7 mpg UK
Cost / 100 km20.83 LC100 km
Cost / 100 mi33.51 LC100 mi
Annual fuel used1,785 L472 US gal393 UK gal
Annual fuel cost3,124 LC/year

Head-to-head comparisons

Cadillac CTS I V 5.7 i V8

  • Has 17 hp more
  • Has 6 Nm more
  • Is 120 kg lighter
  • Is 0.8 s quicker from 0-100 km/h
  • Has 24 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

  • Smallest trunk

Choose cars to compare

Brand
Model
Generation
Engine or modification
Cadillac CTS I V 5.7 i V8
Mercedes-Benz S-class (W221) S 500
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