Car comparison

Mercedes-Benz SLK (R172) AMG SLK 55 V8vsMercedes-Benz SLK (R171) SLK 350 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 SLK (R171)

SLK 350 V6

272 hp3498 ccGasolineRWDAutomaticNaturally aspiratedRoadster2004-2007

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
  • Best power-to-weight
    274 hp/t
    205 kW/t
    3.6 kg/hp
  • 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
  • Best estimated range
    833 km
    518 mi
  • Largest trunk
    225 L
  • Best overall score
    62/100
  • Best performance score
    78/100
  • Best economy score
    84/100
  • Best practicality score
    29/100

Specification comparison

Specification comparison
ModelMercedes-BenzSLK (R172)AMG SLK 55 V8Mercedes-BenzSLK (R171)SLK 350 V6
Power
421hp314kW
272hp203kW
Torque
540Nm398lb-ft
350Nm258lb-ft
Curb weight
1,535kg3,384lb
1,390kg3,064lb
Gross weight
1,910kg4,211lb
1,780kg3,924lb
Top speed
Unrestricted
270 km/h168 mph
Restricted
250 km/h155 mph
Calculated
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Calculated
To 99% top speed
58.1s99% target: 267 km/h / 166 mph
Calculated
69.2s99% target: 257 km/h / 160 mph
Calculated
0-100 km/h
4.6s
5.5s
0-200 km/h
15.0s
Calculated
19.1s
Calculated
0-60 mph
4.4s
Calculated
5.2s
Calculated
Fuel consumption
8.4L/100 km28mpg US33.6mpg UK
10.1L/100 km23.3mpg US28.0mpg UK
Fuel consumption city
12L/100 km19.6mpg US23.5mpg UK
14.2L/100 km16.6mpg US19.9mpg UK
Fuel consumption highway
6.2L/100 km37.9mpg US45.6mpg UK
7.8L/100 km30.2mpg US36.2mpg UK
Quarter mile
12.6s
Calculated
13.6s
Calculated
Power-to-weight
274hp/t205kW/t124hp/1000 lb
Calculated
196hp/t146kW/t89hp/1000 lb
Calculated
Torque-to-weight
352Nm/t235lb-ft/ton
Calculated
252Nm/t168lb-ft/ton
Calculated
Estimated range
833km518mi
Calculated
693km431mi
Calculated
Displacement
5,461cc333cu in
3,498cc213cu in
Length
4,134mm163in
4,089mm161in
Width
1,810mm71in
1,788mm70in
Height
1,301mm51in
1,298mm51in
Wheelbase
2,430mm96in
2,430mm96in
Front track
1,559mm61in
1,526mm60in
Rear track
1,565mm62in
1,549mm61in
Trunk volume
225L
208L
Max trunk volume
335L
-
Doors
2
2
Seats
2
2
Fuel tank
70L
70L
CO2 emissions
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 SLK (R172) AMG SLK 55 V8Mercedes-Benz SLK (R171) SLK 350 V6PowerTorque
  • Mercedes-Benz SLK (R172) AMG SLK 55 V8: Power / Torque
  • Mercedes-Benz SLK (R171) SLK 350 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-BenzSLK (R171)SLK 350 V66,000 rpm2,400-5,000 rpm6,250 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricMercedes-BenzSLK (R172)AMG SLK 55 V8Mercedes-BenzSLK (R171)SLK 350 V6
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
5.5 s
0-200 km/h
0-124 mph
15.0 s
19.1 s
Top speed
Unrestricted
270 km/h168 mph
Restricted
250 km/h155 mph
Limited
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Limited
Drag race simulation
60 ft
18 m
2.2 s
2.3 s
330 ft
101 m
5.6 s
6.0 s
1/8 mile
201 m
8.3 s
8.9 s
1000 ft
305 m
10.7 s
11.5 s
1/4 mile
402 m
12.6 s
13.6 s
Trap speed
1/4 mile
402 m
185 km/h
115 mph
172 km/h
107 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-BenzSLK (R171)SLK 350 V6
272 hp
203 kW

Mercedes-Benz SLK (R172) AMG SLK 55 V8 has 149 hp more than Mercedes-Benz SLK (R171) SLK 350 V6.

The biggest power difference is between Mercedes-Benz SLK (R171) SLK 350 V6 and Mercedes-Benz SLK (R172) AMG SLK 55 V8: 149 hp (111 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-BenzSLK (R171)SLK 350 V6
350 Nm
258 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-BenzSLK (R171)SLK 350 V6
1,390 kg
3,064 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-BenzSLK (R171)SLK 350 V6
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-BenzSLK (R172)AMG SLK 55 V84.6 s
Mercedes-BenzSLK (R171)SLK 350 V65.5 s

The biggest 0-100 km/h difference is between Mercedes-Benz SLK (R172) AMG SLK 55 V8 and Mercedes-Benz SLK (R171) SLK 350 V6: 0.9 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-BenzSLK (R171)SLK 350 V6
10.1 L/100 km
23.3 mpg US
28.0 mpg UK

The biggest fuel consumption difference is between Mercedes-Benz SLK (R172) AMG SLK 55 V8 and Mercedes-Benz SLK (R171) SLK 350 V6: 1.7 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-BenzSLK (R171)SLK 350 V6
196 hp/t
146 kW/t
5.1 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-BenzSLK (R171)SLK 350 V6
693 km
431 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-BenzSLK (R171)SLK 350 V6
272 hp
203 kW
5.5 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-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-BenzSLK (R171)SLK 350 V6
Power
272 hp
203 kW
0-100 km/h5.5 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Doors/seats
2 doors
2 seats
Trunk
208 L
7.3 cu ft
Length
4,089 mm
161.0 in
Height
1,298 mm
51.1 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-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-BenzSLK (R171)SLK 350 V6
Power
272 hp
203 kW
0-100 km/h5.5 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
10.1 L/100 km
23.3 mpg US
28.0 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-BenzSLK (R171)SLK 350 V6
10.1 L/100 km
23.3 mpg US
28.0 mpg UK
5.5 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-BenzSLK (R171)SLK 350 V6
196 hp/t
146 kW/t
5.1 kg/hp
10.1 L/100 km
23.3 mpg US
28.0 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleMercedes-BenzSLK (R172)AMG SLK 55 V8Mercedes-BenzSLK (R171)SLK 350 V6
Power
421 hp
314 kW
272 hp
203 kW
Torque
540 Nm
398 lb-ft
350 Nm
258 lb-ft
Acceleration
4.6 s
5.5 s
Top speed
Unrestricted
270 km/h168 mph
Restricted
250 km/h155 mph
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Lightness
1,535 kg
3,384 lb
1,390 kg
3,064 lb
Fuel consumption
8.4 L/100 km
28.0 mpg US
33.6 mpg UK
10.1 L/100 km
23.3 mpg US
28.0 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
208 L
7.3 cu ft
Length
4,089 mm
161.0 in
Height
1,298 mm
51.1 in
Range score
833 km
518 mi
693 km
431 mi
CO2 score
195 g/km
-
Trunk score
225 L
7.9 cu ft
208 L
7.3 cu ft
Power-to-weight score
274 hp/t
205 kW/t
3.6 kg/hp
196 hp/t
146 kW/t
5.1 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 SLK (R171) SLK 350 V6
Consumption8.4 L/100 km28 mpg US33.6 mpg UK10.1 L/100 km23.3 mpg US28 mpg UK
Cost / 100 km14.70 LC100 km17.68 LC100 km
Cost / 100 mi23.66 LC100 mi28.45 LC100 mi
Annual fuel used1,260 L333 US gal277 UK gal1,515 L400 US gal333 UK gal
Annual fuel cost2,205 LC/year2,651 LC/year

Head-to-head comparisons

Mercedes-Benz SLK (R172) AMG SLK 55 V8

  • Has 149 hp more
  • Has 190 Nm more
  • Is 0.9 s quicker from 0-100 km/h
  • Has 10 km/h (6 mph) higher top speed
  • Uses 1.7 L/100 km less fuel
  • Has 79 hp/t better power-to-weight
  • Has 140 km (87 mi) more estimated range
  • Has 17 L more trunk volume

Pros

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

Cons

  • Heaviest

Choose cars to compare

Brand
Model
Generation
Engine or modification
Mercedes-Benz SLK (R172) AMG SLK 55 V8
Mercedes-Benz SLK (R171) SLK 350 V6
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