Car comparison

Mercedes-Benz SLK (R172) AMG SLK 55 V8vsMercedes-Benz SL (R231) · Facelift 2016 SL 400 V6

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

New comparison

Mercedes-Benz SLK (R172)

AMG SLK 55 V8

421 hp5461 ccGasolineRWDAutomaticNaturally aspiratedRoadster2012-2015
VS

Mercedes-Benz SL (R231) · Facelift 2016

SL 400 V6

367 hp2996 ccGasolineRWDAutomaticTwin-turboRoadster2016-2018

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

  • Quickest 0-100 km/h
    4.6 s
  • Fastest top speed
    270 km/h
    168 mph Unrestricted
    250 km/h
    155 mph Restricted
  • Most powerful
    421 hp
    314 kW
  • Highest torque
    540 Nm
    398 lb-ft
  • Lightest
    1,535 kg
    3,384 lb
  • Best power-to-weight
    274 hp/t
    205 kW/t
    3.6 kg/hp
  • Best overall score
    62/100
  • Best performance score
    78/100

Mercedes-Benz SL (R231) Facelift 2016 SL 400 V6

  • Lowest combined fuel consumption
    7.7 L/100 km
    30.5 mpg US
    36.7 mpg UK
  • Lowest city consumption
    10.5 L/100 km
    22.4 mpg US
    26.9 mpg UK
  • Lowest highway consumption
    6.0 L/100 km
    39.2 mpg US
    47.1 mpg UK
  • Lowest CO2 emissions
    175 g/km
  • Best estimated range
    844 km
    525 mi
  • Largest trunk
    345 L
  • Best economy score
    86/100
  • Best practicality score
    34/100

Specification comparison

Specification comparison
ModelMercedes-BenzSLK (R172)AMG SLK 55 V8Mercedes-BenzSL (R231)Facelift 2016SL 400 V6
Power
421hp314kW
367hp274kW
Torque
540Nm398lb-ft
500Nm369lb-ft
Curb weight
1,535kg3,384lb
1,660kg3,660lb
Gross weight
1,910kg4,211lb
2,115kg4,663lb
Top speed
Unrestricted
270 km/h168 mph
Restricted
250 km/h155 mph
Calculated
Unrestricted
270 km/h168 mph
Restricted
250 km/h155 mph
Calculated
To 99% top speed
58.1s99% target: 267 km/h / 166 mph
Calculated
65.6s99% target: 267 km/h / 166 mph
Calculated
0-100 km/h
4.6s
4.9s
0-200 km/h
15.0s
Calculated
16.4s
Calculated
0-60 mph
4.4s
Calculated
4.7s
Calculated
Fuel consumption
8.4L/100 km28mpg US33.6mpg UK
7.7L/100 km30.5mpg US36.7mpg UK
Fuel consumption city
12L/100 km19.6mpg US23.5mpg UK
10.5L/100 km22.4mpg US26.9mpg UK
Fuel consumption highway
6.2L/100 km37.9mpg US45.6mpg UK
6L/100 km39.2mpg US47.1mpg UK
Quarter mile
12.6s
Calculated
13.0s
Calculated
Power-to-weight
274hp/t205kW/t124hp/1000 lb
Calculated
221hp/t165kW/t100hp/1000 lb
Calculated
Torque-to-weight
352Nm/t235lb-ft/ton
Calculated
301Nm/t202lb-ft/ton
Calculated
Estimated range
833km518mi
Calculated
844km525mi
Calculated
Displacement
5,461cc333cu in
2,996cc183cu in
Length
4,134mm163in
4,631mm182in
Width
1,810mm71in
1,877mm74in
Height
1,301mm51in
1,315mm52in
Wheelbase
2,430mm96in
2,585mm102in
Front track
1,559mm61in
1,600mm63in
Rear track
1,565mm62in
1,604mm63in
Trunk volume
225L
345L
Max trunk volume
335L
485L
Doors
2
2
Seats
2
2
Fuel tank
70L
65L
CO2 emissions
195g/km
175g/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 SLK (R172) AMG SLK 55 V8Mercedes-Benz SL (R231) Facelift 2016 SL 400 V6PowerTorque
  • Mercedes-Benz SLK (R172) AMG SLK 55 V8: Power / Torque
  • Mercedes-Benz SL (R231) Facelift 2016 SL 400 V6: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
Mercedes-BenzSLK (R172)AMG SLK 55 V86,800 rpm4,500 rpm7,050 rpm
Mercedes-BenzSL (R231)Facelift 2016SL 400 V65,500-6,000 rpm2,000-4,200 rpm6,250 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricMercedes-BenzSLK (R172)AMG SLK 55 V8Mercedes-BenzSL (R231)Facelift 2016SL 400 V6
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
4.9 s
0-200 km/h
0-124 mph
15.0 s
16.4 s
Top speed
Unrestricted
270 km/h168 mph
Restricted
250 km/h155 mph
Limited
Unrestricted
270 km/h168 mph
Restricted
250 km/h155 mph
Likely limited
Drag race simulation
60 ft
18 m
2.2 s
2.2 s
330 ft
101 m
5.6 s
5.7 s
1/8 mile
201 m
8.3 s
8.5 s
1000 ft
305 m
10.7 s
10.9 s
1/4 mile
402 m
12.6 s
13.0 s
Trap speed
1/4 mile
402 m
185 km/h
115 mph
180 km/h
112 mph

Power comparison

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

Chart data table
VehicleValue
Mercedes-BenzSLK (R172)AMG SLK 55 V8
421 hp
314 kW
Mercedes-BenzSL (R231)Facelift 2016SL 400 V6
367 hp
274 kW

Mercedes-Benz SLK (R172) AMG SLK 55 V8 has 54 hp more than Mercedes-Benz SL (R231) Facelift 2016 SL 400 V6.

The biggest power difference is between Mercedes-Benz SL (R231) Facelift 2016 SL 400 V6 and Mercedes-Benz SLK (R172) AMG SLK 55 V8: 54 hp (40 kW).

Torque comparison

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

Chart data table
VehicleValue
Mercedes-BenzSLK (R172)AMG SLK 55 V8
540 Nm
398 lb-ft
Mercedes-BenzSL (R231)Facelift 2016SL 400 V6
500 Nm
369 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
Mercedes-BenzSLK (R172)AMG SLK 55 V8
1,535 kg
3,384 lb
Mercedes-BenzSL (R231)Facelift 2016SL 400 V6
1,660 kg
3,660 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-BenzSLK (R172)AMG SLK 55 V8
Unrestricted
270 km/h168 mph
Restricted
250 km/h155 mph
Mercedes-BenzSL (R231)Facelift 2016SL 400 V6
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-BenzSLK (R172)AMG SLK 55 V84.6 s
Mercedes-BenzSL (R231)Facelift 2016SL 400 V64.9 s

The biggest 0-100 km/h difference is between Mercedes-Benz SLK (R172) AMG SLK 55 V8 and Mercedes-Benz SL (R231) Facelift 2016 SL 400 V6: 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
Mercedes-BenzSLK (R172)AMG SLK 55 V8
8.4 L/100 km
28.0 mpg US
33.6 mpg UK
Mercedes-BenzSL (R231)Facelift 2016SL 400 V6
7.7 L/100 km
30.5 mpg US
36.7 mpg UK

The biggest fuel consumption difference is between Mercedes-Benz SL (R231) Facelift 2016 SL 400 V6 and Mercedes-Benz SLK (R172) AMG SLK 55 V8: 0.7 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-BenzSLK (R172)AMG SLK 55 V8
274 hp/t
205 kW/t
3.6 kg/hp
Mercedes-BenzSL (R231)Facelift 2016SL 400 V6
221 hp/t
165 kW/t
4.5 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
Mercedes-BenzSLK (R172)AMG SLK 55 V8
833 km
518 mi
Mercedes-BenzSL (R231)Facelift 2016SL 400 V6
844 km
525 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
Mercedes-BenzSLK (R172)AMG SLK 55 V8
421 hp
314 kW
4.6 s
Unrestricted
270 km/h168 mph
Restricted
250 km/h155 mph
Mercedes-BenzSL (R231)Facelift 2016SL 400 V6
367 hp
274 kW
4.9 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-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
Mercedes-BenzSL (R231)Facelift 2016SL 400 V6
Power
367 hp
274 kW
0-100 km/h4.9 s
Top speed
Unrestricted
270 km/h168 mph
Restricted
250 km/h155 mph
Doors/seats
2 doors
2 seats
Trunk
345 L
12.2 cu ft
Length
4,631 mm
182.3 in
Height
1,315 mm
51.8 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-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-BenzSL (R231)Facelift 2016SL 400 V6
Power
367 hp
274 kW
0-100 km/h4.9 s
Top speed
Unrestricted
270 km/h168 mph
Restricted
250 km/h155 mph
7.7 L/100 km
30.5 mpg US
36.7 mpg UK

Mercedes-Benz SLK (R172) AMG SLK 55 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-BenzSLK (R172)AMG SLK 55 V8
8.4 L/100 km
28.0 mpg US
33.6 mpg UK
4.6 s
Mercedes-BenzSL (R231)Facelift 2016SL 400 V6
7.7 L/100 km
30.5 mpg US
36.7 mpg UK
4.9 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
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
Mercedes-BenzSL (R231)Facelift 2016SL 400 V6
221 hp/t
165 kW/t
4.5 kg/hp
7.7 L/100 km
30.5 mpg US
36.7 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleMercedes-BenzSLK (R172)AMG SLK 55 V8Mercedes-BenzSL (R231)Facelift 2016SL 400 V6
Power
421 hp
314 kW
367 hp
274 kW
Torque
540 Nm
398 lb-ft
500 Nm
369 lb-ft
Acceleration
4.6 s
4.9 s
Top speed
Unrestricted
270 km/h168 mph
Restricted
250 km/h155 mph
Unrestricted
270 km/h168 mph
Restricted
250 km/h155 mph
Lightness
1,535 kg
3,384 lb
1,660 kg
3,660 lb
Fuel consumption
8.4 L/100 km
28.0 mpg US
33.6 mpg UK
7.7 L/100 km
30.5 mpg US
36.7 mpg UK
Practicality
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
Doors/seats
2 doors
2 seats
Trunk
345 L
12.2 cu ft
Length
4,631 mm
182.3 in
Height
1,315 mm
51.8 in
Range score
833 km
518 mi
844 km
525 mi
CO2 score
195 g/km
175 g/km
Trunk score
225 L
7.9 cu ft
345 L
12.2 cu ft
Power-to-weight score
274 hp/t
205 kW/t
3.6 kg/hp
221 hp/t
165 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 SLK (R172) AMG SLK 55 V8Mercedes-Benz SL (R231) Facelift 2016 SL 400 V6
Consumption8.4 L/100 km28 mpg US33.6 mpg UK7.7 L/100 km30.5 mpg US36.7 mpg UK
Cost / 100 km14.70 LC100 km13.48 LC100 km
Cost / 100 mi23.66 LC100 mi21.69 LC100 mi
Annual fuel used1,260 L333 US gal277 UK gal1,155 L305 US gal254 UK gal
Annual fuel cost2,205 LC/year2,021 LC/year

Head-to-head comparisons

Mercedes-Benz SLK (R172) AMG SLK 55 V8

  • Has 54 hp more
  • Has 40 Nm more
  • Is 125 kg lighter
  • Is 0.3 s quicker from 0-100 km/h
  • Has 53 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
  • Highest CO2 emissions

Mercedes-Benz SL (R231) Facelift 2016 SL 400 V6

  • Uses 0.7 L/100 km less fuel
  • Has 11 km (7 mi) more estimated range
  • Has 120 L more trunk volume
  • Emits 20 g/km less CO2

Pros

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

Cons

  • Slowest 0-100 km/h
  • Lowest power
  • Heaviest

Choose cars to compare

Brand
Model
Generation
Engine or modification
Mercedes-Benz SLK (R172) AMG SLK 55 V8
Mercedes-Benz SL (R231) SL 400 V6
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2 vehicles selected

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