Car comparison

Mercedes-Benz AMG GT Roadster (R190) 4.0 V8vsMercedes-Benz SLK (R172) AMG SLK 55 V8

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

New comparison

Mercedes-Benz AMG GT Roadster (R190)

4.0 V8

476 hp3982 ccGasolineRWDDual-clutchTwin-turboRoadster2017-2021
VS

Mercedes-Benz SLK (R172)

AMG SLK 55 V8

421 hp5461 ccGasolineRWDAutomaticNaturally aspiratedRoadster2012-2015

Comparison overview

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

Best choices

Mercedes-Benz SLK (R172) AMG SLK 55 V8

  • Lightest
    1,535 kg
    3,384 lb
  • Lowest combined fuel consumption
    8.4 L/100 km
    28.0 mpg US
    33.6 mpg UK
  • Lowest city consumption
    12.0 L/100 km
    19.6 mpg US
    23.5 mpg UK
  • Lowest highway consumption
    6.2 L/100 km
    37.9 mpg US
    45.6 mpg UK
  • Lowest CO2 emissions
    195 g/km
  • Best estimated range
    833 km
    518 mi
  • Largest trunk
    225 L
  • Best economy score
    84/100
  • Best practicality score
    29/100

Mercedes-Benz AMG GT Roadster (R190) 4.0 V8

  • Quickest 0-100 km/h
    4.0 s
  • Fastest top speed
    302 km/h
    188 mph
  • Most powerful
    476 hp
    355 kW
  • Highest torque
    630 Nm
    465 lb-ft
  • Best power-to-weight
    298 hp/t
    223 kW/t
    3.4 kg/hp
  • Best overall score
    67/100
  • Best performance score
    86/100

Specification comparison

Specification comparison
ModelMercedes-BenzAMG GT Roadster (R190)4.0 V8Mercedes-BenzSLK (R172)AMG SLK 55 V8
Power
476hp355kW
421hp314kW
Torque
630Nm465lb-ft
540Nm398lb-ft
Curb weight
1,595kg3,516lb
1,535kg3,384lb
Gross weight
1,940kg4,277lb
1,910kg4,211lb
Top speed
302 km/h
188 mph
Unrestricted
270 km/h168 mph
Restricted
250 km/h155 mph
Calculated
To 99% top speed
61.8s99% target: 299 km/h / 186 mph
Calculated
58.1s99% target: 267 km/h / 166 mph
Calculated
0-100 km/h
4.0s
4.6s
0-200 km/h
12.2s
Calculated
15.0s
Calculated
0-60 mph
3.8s
Calculated
4.4s
Calculated
Fuel consumption
9.4L/100 km25mpg US30.1mpg UK
8.4L/100 km28mpg US33.6mpg UK
Fuel consumption city
12.2L/100 km19.3mpg US23.2mpg UK
12L/100 km19.6mpg US23.5mpg UK
Fuel consumption highway
7.8L/100 km30.2mpg US36.2mpg UK
6.2L/100 km37.9mpg US45.6mpg UK
Quarter mile
11.9s
Calculated
12.6s
Calculated
Power-to-weight
298hp/t223kW/t135hp/1000 lb
Calculated
274hp/t205kW/t124hp/1000 lb
Calculated
Torque-to-weight
395Nm/t264lb-ft/ton
Calculated
352Nm/t235lb-ft/ton
Calculated
Estimated range
691km430mi
Calculated
833km518mi
Calculated
Displacement
3,982cc243cu in
5,461cc333cu in
Length
4,544mm179in
4,134mm163in
Width
1,939mm76in
1,810mm71in
Height
1,259mm50in
1,301mm51in
Wheelbase
2,630mm104in
2,430mm96in
Front track
1,684mm66in
1,559mm61in
Rear track
1,651mm65in
1,565mm62in
Trunk volume
165L
225L
Max trunk volume-
335L
Doors
2
2
Seats
2
2
Fuel tank
65L
70L
CO2 emissions
219g/km
195g/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 AMG GT Roadster (R190) 4.0 V8Mercedes-Benz SLK (R172) AMG SLK 55 V8PowerTorque
  • Mercedes-Benz AMG GT Roadster (R190) 4.0 V8: Power / Torque
  • Mercedes-Benz SLK (R172) AMG SLK 55 V8: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
Mercedes-BenzAMG GT Roadster (R190)4.0 V86,000 rpm1,700-5,000 rpm6,250 rpm
Mercedes-BenzSLK (R172)AMG SLK 55 V86,800 rpm4,500 rpm7,050 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricMercedes-BenzAMG GT Roadster (R190)4.0 V8Mercedes-BenzSLK (R172)AMG SLK 55 V8
Acceleration checkpoints
0-60 mph
0-97 km/h
3.8 s
4.4 s
0-100 km/h
0-62 mph
4.0 s
4.6 s
0-200 km/h
0-124 mph
12.2 s
15.0 s
Top speed
302 km/h
188 mph
Unrestricted
270 km/h168 mph
Restricted
250 km/h155 mph
Limited
Drag race simulation
60 ft
18 m
2.0 s
2.2 s
330 ft
101 m
5.2 s
5.6 s
1/8 mile
201 m
7.8 s
8.3 s
1000 ft
305 m
10.0 s
10.7 s
1/4 mile
402 m
11.9 s
12.6 s
Trap speed
1/4 mile
402 m
197 km/h
123 mph
185 km/h
115 mph

Power comparison

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

Chart data table
VehicleValue
Mercedes-BenzAMG GT Roadster (R190)4.0 V8
476 hp
355 kW
Mercedes-BenzSLK (R172)AMG SLK 55 V8
421 hp
314 kW

Mercedes-Benz AMG GT Roadster (R190) 4.0 V8 has 55 hp more than Mercedes-Benz SLK (R172) AMG SLK 55 V8.

The biggest power difference is between Mercedes-Benz SLK (R172) AMG SLK 55 V8 and Mercedes-Benz AMG GT Roadster (R190) 4.0 V8: 55 hp (41 kW).

Torque comparison

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

Chart data table
VehicleValue
Mercedes-BenzAMG GT Roadster (R190)4.0 V8
630 Nm
465 lb-ft
Mercedes-BenzSLK (R172)AMG SLK 55 V8
540 Nm
398 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
Mercedes-BenzAMG GT Roadster (R190)4.0 V8
1,595 kg
3,516 lb
Mercedes-BenzSLK (R172)AMG SLK 55 V8
1,535 kg
3,384 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-BenzAMG GT Roadster (R190)4.0 V8
302 km/h
188 mph
Mercedes-BenzSLK (R172)AMG SLK 55 V8
Unrestricted
270 km/h168 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-BenzAMG GT Roadster (R190)4.0 V84.0 s
Mercedes-BenzSLK (R172)AMG SLK 55 V84.6 s

The biggest 0-100 km/h difference is between Mercedes-Benz AMG GT Roadster (R190) 4.0 V8 and Mercedes-Benz SLK (R172) AMG SLK 55 V8: 0.6 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-BenzAMG GT Roadster (R190)4.0 V8
9.4 L/100 km
25.0 mpg US
30.1 mpg UK
Mercedes-BenzSLK (R172)AMG SLK 55 V8
8.4 L/100 km
28.0 mpg US
33.6 mpg UK

The biggest fuel consumption difference is between Mercedes-Benz SLK (R172) AMG SLK 55 V8 and Mercedes-Benz AMG GT Roadster (R190) 4.0 V8: 1.0 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-BenzAMG GT Roadster (R190)4.0 V8
298 hp/t
223 kW/t
3.4 kg/hp
Mercedes-BenzSLK (R172)AMG SLK 55 V8
274 hp/t
205 kW/t
3.6 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
Mercedes-BenzAMG GT Roadster (R190)4.0 V8
691 km
430 mi
Mercedes-BenzSLK (R172)AMG SLK 55 V8
833 km
518 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
Mercedes-BenzAMG GT Roadster (R190)4.0 V8
476 hp
355 kW
4.0 s
302 km/h
188 mph
Mercedes-BenzSLK (R172)AMG SLK 55 V8
421 hp
314 kW
4.6 s
Unrestricted
270 km/h168 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-BenzAMG GT Roadster (R190)4.0 V8
Power
476 hp
355 kW
0-100 km/h4.0 s
Top speed
302 km/h
188 mph
Doors/seats
2 doors
2 seats
Trunk
165 L
5.8 cu ft
Length
4,544 mm
178.9 in
Height
1,259 mm
49.6 in
Mercedes-BenzSLK (R172)AMG SLK 55 V8
Power
421 hp
314 kW
0-100 km/h4.6 s
Top speed
Unrestricted
270 km/h168 mph
Restricted
250 km/h155 mph
Doors/seats
2 doors
2 seats
Trunk
225 L
7.9 cu ft
Length
4,134 mm
162.8 in
Height
1,301 mm
51.2 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-BenzAMG GT Roadster (R190)4.0 V8
Power
476 hp
355 kW
0-100 km/h4.0 s
Top speed
302 km/h
188 mph
9.4 L/100 km
25.0 mpg US
30.1 mpg UK
Mercedes-BenzSLK (R172)AMG SLK 55 V8
Power
421 hp
314 kW
0-100 km/h4.6 s
Top speed
Unrestricted
270 km/h168 mph
Restricted
250 km/h155 mph
8.4 L/100 km
28.0 mpg US
33.6 mpg UK

Mercedes-Benz AMG GT Roadster (R190) 4.0 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-BenzAMG GT Roadster (R190)4.0 V8
9.4 L/100 km
25.0 mpg US
30.1 mpg UK
4.0 s
Mercedes-BenzSLK (R172)AMG SLK 55 V8
8.4 L/100 km
28.0 mpg US
33.6 mpg UK
4.6 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-BenzAMG GT Roadster (R190)4.0 V8
298 hp/t
223 kW/t
3.4 kg/hp
9.4 L/100 km
25.0 mpg US
30.1 mpg UK
Mercedes-BenzSLK (R172)AMG SLK 55 V8
274 hp/t
205 kW/t
3.6 kg/hp
8.4 L/100 km
28.0 mpg US
33.6 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleMercedes-BenzAMG GT Roadster (R190)4.0 V8Mercedes-BenzSLK (R172)AMG SLK 55 V8
Power
476 hp
355 kW
421 hp
314 kW
Torque
630 Nm
465 lb-ft
540 Nm
398 lb-ft
Acceleration
4.0 s
4.6 s
Top speed
302 km/h
188 mph
Unrestricted
270 km/h168 mph
Restricted
250 km/h155 mph
Lightness
1,595 kg
3,516 lb
1,535 kg
3,384 lb
Fuel consumption
9.4 L/100 km
25.0 mpg US
30.1 mpg UK
8.4 L/100 km
28.0 mpg US
33.6 mpg UK
Practicality
Doors/seats
2 doors
2 seats
Trunk
165 L
5.8 cu ft
Length
4,544 mm
178.9 in
Height
1,259 mm
49.6 in
Doors/seats
2 doors
2 seats
Trunk
225 L
7.9 cu ft
Length
4,134 mm
162.8 in
Height
1,301 mm
51.2 in
Range score
691 km
430 mi
833 km
518 mi
CO2 score
219 g/km
195 g/km
Trunk score
165 L
5.8 cu ft
225 L
7.9 cu ft
Power-to-weight score
298 hp/t
223 kW/t
3.4 kg/hp
274 hp/t
205 kW/t
3.6 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 AMG GT Roadster (R190) 4.0 V8Mercedes-Benz SLK (R172) AMG SLK 55 V8
Consumption9.4 L/100 km25 mpg US30.1 mpg UK8.4 L/100 km28 mpg US33.6 mpg UK
Cost / 100 km16.45 LC100 km14.70 LC100 km
Cost / 100 mi26.47 LC100 mi23.66 LC100 mi
Annual fuel used1,410 L372 US gal310 UK gal1,260 L333 US gal277 UK gal
Annual fuel cost2,468 LC/year2,205 LC/year

Head-to-head comparisons

Mercedes-Benz AMG GT Roadster (R190) 4.0 V8

  • Has 55 hp more
  • Has 90 Nm more
  • Is 0.6 s quicker from 0-100 km/h
  • Has 32 km/h (20 mph) higher top speed
  • Has 24 hp/t better power-to-weight

Pros

  • Quickest 0-100 km/h in this comparison
  • Highest top speed
  • Most powerful
  • Highest torque
  • Best power-to-weight ratio

Cons

  • Highest combined fuel consumption
  • Heaviest
  • Smallest trunk
  • Highest CO2 emissions

Mercedes-Benz SLK (R172) AMG SLK 55 V8

  • Is 60 kg lighter
  • Uses 1.0 L/100 km less fuel
  • Has 142 km (88 mi) more estimated range
  • Has 60 L more trunk volume
  • Emits 24 g/km less CO2

Pros

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

Cons

  • Slowest 0-100 km/h
  • Lowest power
  • Lowest top speed

Choose cars to compare

Brand
Model
Generation
Engine or modification
Mercedes-Benz AMG GT Roadster (R190) 4.0 V8
Mercedes-Benz SLK (R172) AMG SLK 55 V8
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