Car comparison

Mercedes-Benz S-class Cabriolet (A217) S 500 V8vsRolls-Royce Dawn 6.6 V12

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

New comparison

Mercedes-Benz S-class Cabriolet (A217)

S 500 V8

456 hp4663 ccGasolineRWDAutomaticTwin-turboCabriolet / convertible2015-2017
VS

Rolls-Royce Dawn

6.6 V12

571 hp6592 ccGasolineRWDAutomaticTwin-turboCabriolet / convertible2015-present

Comparison overview

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

Best choices

Mercedes-Benz S-class Cabriolet (A217) S 500 V8

  • Quickest 0-100 km/h
    4.6 s
  • Fastest top speed
    260 km/h
    162 mph Unrestricted
    250 km/h
    155 mph Restricted
  • Lightest
    2,040 kg
    4,497 lb
  • Best power-to-weight
    224 hp/t
    167 kW/t
    4.5 kg/hp
  • Lowest combined fuel consumption
    9.1 L/100 km
    25.8 mpg US
    31.0 mpg UK
  • Lowest city consumption
    12.2 L/100 km
    19.3 mpg US
    23.2 mpg UK
  • Lowest highway consumption
    7.5 L/100 km
    31.4 mpg US
    37.7 mpg UK
  • Lowest CO2 emissions
    212 g/km
  • Largest trunk
    350 L
  • Best overall score
    70/100
  • Best performance score
    80/100
  • Best economy score
    82/100
  • Best practicality score
    48/100

Specification comparison

Specification comparison
ModelMercedes-BenzS-class Cabriolet (A217)S 500 V8Rolls-RoyceDawn6.6 V12
Power
456hp340kW
571hp426kW
Torque
700Nm516lb-ft
820Nm605lb-ft
Curb weight
2,040kg4,497lb
2,560kg5,644lb
Gross weight
2,590kg5,710lb
-
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Calculated
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Calculated
To 99% top speed
64.7s99% target: 257 km/h / 160 mph
Calculated
77.0s99% target: 257 km/h / 160 mph
Calculated
0-100 km/h
4.6s
5.0s
0-200 km/h
16.9s
Calculated
19.2s
Calculated
0-60 mph
4.4s
Calculated
4.7s
Calculated
Fuel consumption
9.1L/100 km25.8mpg US31.0mpg UK
14.4L/100 km16.3mpg US19.6mpg UK
Fuel consumption city
12.2L/100 km19.3mpg US23.2mpg UK
22.1L/100 km10.6mpg US12.8mpg UK
Fuel consumption highway
7.5L/100 km31.4mpg US37.7mpg UK
10L/100 km23.5mpg US28.2mpg UK
Quarter mile
12.8s
Calculated
13.2s
Calculated
Power-to-weight
224hp/t167kW/t101hp/1000 lb
Calculated
223hp/t166kW/t101hp/1000 lb
Calculated
Torque-to-weight
343Nm/t230lb-ft/ton
Calculated
320Nm/t214lb-ft/ton
Calculated
Estimated range
879km546mi
Calculated
-
Displacement
4,663cc285cu in
6,592cc402cu in
Length
5,027mm198in
5,285mm208in
Width
1,899mm75in
1,947mm77in
Height
1,417mm56in
1,502mm59in
Wheelbase
2,945mm116in
3,112mm123in
Front track
1,625mm64in
-
Rear track
1,649mm65in
-
Trunk volume
350L
321L
Doors
2
2
Seats
4
4
Fuel tank
80L
-
CO2 emissions
212g/km
330g/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.

Mercedes-Benz S-class Cabriolet (A217) S 500 V8Rolls-Royce Dawn 6.6 V12PowerTorque
  • Mercedes-Benz S-class Cabriolet (A217) S 500 V8: Power / Torque
  • Rolls-Royce Dawn 6.6 V12: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
Mercedes-BenzS-class Cabriolet (A217)S 500 V85,250-5,500 rpm1,800-3,500 rpm5,750 rpm
Rolls-RoyceDawn6.6 V125,250-6,000 rpm1,500-5,000 rpm6,250 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricMercedes-BenzS-class Cabriolet (A217)S 500 V8Rolls-RoyceDawn6.6 V12
Acceleration checkpoints
0-60 mph
0-97 km/h
4.4 s
4.7 s
0-100 km/h
0-62 mph
4.6 s
5.0 s
0-200 km/h
0-124 mph
16.9 s
19.2 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Likely limited
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Likely limited
Drag race simulation
60 ft
18 m
2.1 s
2.1 s
330 ft
101 m
5.5 s
5.7 s
1/8 mile
201 m
8.3 s
8.6 s
1000 ft
305 m
10.7 s
11.1 s
1/4 mile
402 m
12.8 s
13.2 s
Trap speed
1/4 mile
402 m
178 km/h
111 mph
172 km/h
107 mph

Power comparison

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

Chart data table
VehicleValue
Mercedes-BenzS-class Cabriolet (A217)S 500 V8
456 hp
340 kW
Rolls-RoyceDawn6.6 V12
571 hp
426 kW

Rolls-Royce Dawn 6.6 V12 has 115 hp more than Mercedes-Benz S-class Cabriolet (A217) S 500 V8.

The biggest power difference is between Mercedes-Benz S-class Cabriolet (A217) S 500 V8 and Rolls-Royce Dawn 6.6 V12: 115 hp (86 kW).

Torque comparison

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

Chart data table
VehicleValue
Mercedes-BenzS-class Cabriolet (A217)S 500 V8
700 Nm
516 lb-ft
Rolls-RoyceDawn6.6 V12
820 Nm
605 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
Mercedes-BenzS-class Cabriolet (A217)S 500 V8
2,040 kg
4,497 lb
Rolls-RoyceDawn6.6 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
Mercedes-BenzS-class Cabriolet (A217)S 500 V8
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Rolls-RoyceDawn6.6 V12
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
Mercedes-BenzS-class Cabriolet (A217)S 500 V84.6 s
Rolls-RoyceDawn6.6 V125.0 s

Although Rolls-Royce Dawn 6.6 V12 has more power, Mercedes-Benz S-class Cabriolet (A217) S 500 V8 is quicker from 0-100 km/h.

The biggest 0-100 km/h difference is between Mercedes-Benz S-class Cabriolet (A217) S 500 V8 and Rolls-Royce Dawn 6.6 V12: 0.4 s.

Fuel consumption comparison

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

Chart data table
VehicleValue
Mercedes-BenzS-class Cabriolet (A217)S 500 V8
9.1 L/100 km
25.8 mpg US
31.0 mpg UK
Rolls-RoyceDawn6.6 V12
14.4 L/100 km
16.3 mpg US
19.6 mpg UK

The biggest fuel consumption difference is between Mercedes-Benz S-class Cabriolet (A217) S 500 V8 and Rolls-Royce Dawn 6.6 V12: 5.3 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
Mercedes-BenzS-class Cabriolet (A217)S 500 V8
224 hp/t
167 kW/t
4.5 kg/hp
Rolls-RoyceDawn6.6 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
Mercedes-BenzS-class Cabriolet (A217)S 500 V8
456 hp
340 kW
4.6 s
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Rolls-RoyceDawn6.6 V12
571 hp
426 kW
5.0 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
Mercedes-BenzS-class Cabriolet (A217)S 500 V8
Power
456 hp
340 kW
0-100 km/h4.6 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Doors/seats
2 doors
4 seats
Trunk
350 L
12.4 cu ft
Length
5,027 mm
197.9 in
Height
1,417 mm
55.8 in
Rolls-RoyceDawn6.6 V12
Power
571 hp
426 kW
0-100 km/h5.0 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Doors/seats
2 doors
4 seats
Trunk
321 L
11.3 cu ft
Length
5,285 mm
208.1 in
Height
1,502 mm
59.1 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
Mercedes-BenzS-class Cabriolet (A217)S 500 V8
Power
456 hp
340 kW
0-100 km/h4.6 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
9.1 L/100 km
25.8 mpg US
31.0 mpg UK
Rolls-RoyceDawn6.6 V12
Power
571 hp
426 kW
0-100 km/h5.0 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
14.4 L/100 km
16.3 mpg US
19.6 mpg UK

Mercedes-Benz S-class Cabriolet (A217) S 500 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
Mercedes-BenzS-class Cabriolet (A217)S 500 V8
9.1 L/100 km
25.8 mpg US
31.0 mpg UK
4.6 s
Rolls-RoyceDawn6.6 V12
14.4 L/100 km
16.3 mpg US
19.6 mpg UK
5.0 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
Mercedes-BenzS-class Cabriolet (A217)S 500 V8
224 hp/t
167 kW/t
4.5 kg/hp
9.1 L/100 km
25.8 mpg US
31.0 mpg UK
Rolls-RoyceDawn6.6 V12
223 hp/t
166 kW/t
4.5 kg/hp
14.4 L/100 km
16.3 mpg US
19.6 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleMercedes-BenzS-class Cabriolet (A217)S 500 V8Rolls-RoyceDawn6.6 V12
Power
456 hp
340 kW
571 hp
426 kW
Torque
700 Nm
516 lb-ft
820 Nm
605 lb-ft
Acceleration
4.6 s
5.0 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Lightness
2,040 kg
4,497 lb
2,560 kg
5,644 lb
Fuel consumption
9.1 L/100 km
25.8 mpg US
31.0 mpg UK
14.4 L/100 km
16.3 mpg US
19.6 mpg UK
Practicality
Doors/seats
2 doors
4 seats
Trunk
350 L
12.4 cu ft
Length
5,027 mm
197.9 in
Height
1,417 mm
55.8 in
Doors/seats
2 doors
4 seats
Trunk
321 L
11.3 cu ft
Length
5,285 mm
208.1 in
Height
1,502 mm
59.1 in
Range score
879 km
546 mi
-
CO2 score
212 g/km
330 g/km
Trunk score
350 L
12.4 cu ft
321 L
11.3 cu ft
Power-to-weight score
224 hp/t
167 kW/t
4.5 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
VehicleMercedes-Benz S-class Cabriolet (A217) S 500 V8Rolls-Royce Dawn 6.6 V12
Consumption9.1 L/100 km25.8 mpg US31 mpg UK14.4 L/100 km16.3 mpg US19.6 mpg UK
Cost / 100 km15.92 LC100 km25.20 LC100 km
Cost / 100 mi25.63 LC100 mi40.56 LC100 mi
Annual fuel used1,365 L361 US gal300 UK gal2,160 L571 US gal475 UK gal
Annual fuel cost2,389 LC/year3,780 LC/year

Head-to-head comparisons

Mercedes-Benz S-class Cabriolet (A217) S 500 V8

  • Is 520 kg lighter
  • Is 0.4 s quicker from 0-100 km/h
  • Uses 5.3 L/100 km less fuel
  • Has 0 hp/t better power-to-weight
  • Has 29 L more trunk volume
  • Emits 118 g/km less CO2

Pros

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

Cons

  • Lowest power

Rolls-Royce Dawn 6.6 V12

  • Has 115 hp more
  • Has 120 Nm more

Pros

  • Most powerful
  • Highest torque

Cons

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

Choose cars to compare

Brand
Model
Generation
Engine or modification
Mercedes-Benz S-class Cabriolet (A217) S 500 V8
Rolls-Royce Dawn 6.6 V12
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