Car comparison

Mercedes-Benz SLK (R171) · Facelift 2008 SLK 350 V6vsMercedes-Benz SLK (R172) SLK 250

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

New comparison

Mercedes-Benz SLK (R171) · Facelift 2008

SLK 350 V6

305 hp3498 ccGasolineRWDManualNaturally aspiratedRoadster2008-2011
VS

Mercedes-Benz SLK (R172)

SLK 250

204 hp1796 ccGasolineRWDAutomaticTurbochargedRoadster2011-2015

Comparison overview

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

Best choices

Mercedes-Benz SLK (R171) Facelift 2008 SLK 350 V6

  • Quickest 0-100 km/h
    5.4 s
  • Fastest top speed
    270 km/h
    168 mph Unrestricted
    250 km/h
    155 mph Restricted
  • Most powerful
    305 hp
    227 kW
  • Highest torque
    360 Nm
    266 lb-ft
  • Best power-to-weight
    213 hp/t
    159 kW/t
    4.7 kg/hp
  • Best overall score
    55/100
  • Best performance score
    67/100
  • Best practicality score
    29/100

Mercedes-Benz SLK (R172) SLK 250

  • Lightest
    1,425 kg
    3,142 lb
  • Lowest combined fuel consumption
    6.6 L/100 km
    35.6 mpg US
    42.8 mpg UK
  • Lowest city consumption
    8.7 L/100 km
    27.0 mpg US
    32.5 mpg UK
  • Lowest highway consumption
    5.4 L/100 km
    43.6 mpg US
    52.3 mpg UK
  • Best estimated range
    909 km
    565 mi
  • Largest trunk
    225 L
  • Best economy score
    89/100

Specification comparison

Specification comparison
ModelMercedes-BenzSLK (R171)Facelift 2008SLK 350 V6Mercedes-BenzSLK (R172)SLK 250
Power
305hp227kW
204hp152kW
Torque
360Nm266lb-ft
310Nm229lb-ft
Curb weight
1,430kg3,153lb
1,425kg3,142lb
Gross weight
1,800kg3,968lb
1,815kg4,001lb
Top speed
Unrestricted
270 km/h168 mph
Restricted
250 km/h155 mph
Calculated
243 km/h
151 mph
To 99% top speed
70.5s99% target: 267 km/h / 166 mph
Calculated
80.9s99% target: 241 km/h / 149 mph
Calculated
0-100 km/h
5.4s
6.6s
0-200 km/h
17.9s
Calculated
26.0s
Calculated
0-60 mph
5.1s
Calculated
6.3s
Calculated
Fuel consumption
9.7L/100 km24.2mpg US29.1mpg UK
6.6L/100 km35.6mpg US42.8mpg UK
Fuel consumption city
14.5L/100 km16.2mpg US19.5mpg UK
8.7L/100 km27mpg US32.5mpg UK
Fuel consumption highway
7L/100 km33.6mpg US40.4mpg UK
5.4L/100 km43.6mpg US52.3mpg UK
Quarter mile
13.4s
Calculated
14.6s
Calculated
Power-to-weight
213hp/t159kW/t97hp/1000 lb
Calculated
143hp/t107kW/t65hp/1000 lb
Calculated
Torque-to-weight
252Nm/t168lb-ft/ton
Calculated
218Nm/t146lb-ft/ton
Calculated
Estimated range
722km448mi
Calculated
909km565mi
Calculated
Displacement
3,498cc213cu in
1,796cc110cu in
Length
4,107mm162in
4,134mm163in
Width
1,788mm70in
1,810mm71in
Height
1,298mm51in
1,303mm51in
Wheelbase
2,430mm96in
2,430mm96in
Front track
1,526mm60in
1,551mm61in
Rear track
1,549mm61in
1,568mm62in
Trunk volume
208L
225L
Max trunk volume-
335L
Doors
2
2
Seats
2
2
Fuel tank
70L
60L

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 (R171) Facelift 2008 SLK 350 V6Mercedes-Benz SLK (R172) SLK 250PowerTorque
  • Mercedes-Benz SLK (R171) Facelift 2008 SLK 350 V6: Power / Torque
  • Mercedes-Benz SLK (R172) SLK 250: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
Mercedes-BenzSLK (R171)Facelift 2008SLK 350 V66,500 rpm4,900 rpm6,750 rpm
Mercedes-BenzSLK (R172)SLK 2505,500 rpm2,000-4,300 rpm5,750 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricMercedes-BenzSLK (R171)Facelift 2008SLK 350 V6Mercedes-BenzSLK (R172)SLK 250
Acceleration checkpoints
0-60 mph
0-97 km/h
5.1 s
6.3 s
0-100 km/h
0-62 mph
5.4 s
6.6 s
0-200 km/h
0-124 mph
17.9 s
26.0 s
Top speed
Unrestricted
270 km/h168 mph
Restricted
250 km/h155 mph
Limited
243 km/h
151 mph
Drag race simulation
60 ft
18 m
2.3 s
2.4 s
330 ft
101 m
5.9 s
6.4 s
1/8 mile
201 m
8.9 s
9.6 s
1000 ft
305 m
11.4 s
12.3 s
1/4 mile
402 m
13.4 s
14.6 s
Trap speed
1/4 mile
402 m
175 km/h
109 mph
158 km/h
98 mph

Power comparison

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

Chart data table
VehicleValue
Mercedes-BenzSLK (R171)Facelift 2008SLK 350 V6
305 hp
227 kW
Mercedes-BenzSLK (R172)SLK 250
204 hp
152 kW

Mercedes-Benz SLK (R171) Facelift 2008 SLK 350 V6 has 101 hp more than Mercedes-Benz SLK (R172) SLK 250.

The biggest power difference is between Mercedes-Benz SLK (R172) SLK 250 and Mercedes-Benz SLK (R171) Facelift 2008 SLK 350 V6: 101 hp (75 kW).

Torque comparison

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

Chart data table
VehicleValue
Mercedes-BenzSLK (R171)Facelift 2008SLK 350 V6
360 Nm
266 lb-ft
Mercedes-BenzSLK (R172)SLK 250
310 Nm
229 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
Mercedes-BenzSLK (R171)Facelift 2008SLK 350 V6
1,430 kg
3,153 lb
Mercedes-BenzSLK (R172)SLK 250
1,425 kg
3,142 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 (R171)Facelift 2008SLK 350 V6
Unrestricted
270 km/h168 mph
Restricted
250 km/h155 mph
Mercedes-BenzSLK (R172)SLK 250
243 km/h
151 mph

0-100 km/h comparison

Bar comparison chart for 0-100 km/h. Lower is better · seconds

Chart data table
VehicleValue
Mercedes-BenzSLK (R171)Facelift 2008SLK 350 V65.4 s
Mercedes-BenzSLK (R172)SLK 2506.6 s

The biggest 0-100 km/h difference is between Mercedes-Benz SLK (R171) Facelift 2008 SLK 350 V6 and Mercedes-Benz SLK (R172) SLK 250: 1.2 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 (R171)Facelift 2008SLK 350 V6
9.7 L/100 km
24.2 mpg US
29.1 mpg UK
Mercedes-BenzSLK (R172)SLK 250
6.6 L/100 km
35.6 mpg US
42.8 mpg UK

The biggest fuel consumption difference is between Mercedes-Benz SLK (R172) SLK 250 and Mercedes-Benz SLK (R171) Facelift 2008 SLK 350 V6: 3.1 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 (R171)Facelift 2008SLK 350 V6
213 hp/t
159 kW/t
4.7 kg/hp
Mercedes-BenzSLK (R172)SLK 250
143 hp/t
107 kW/t
7.0 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
Mercedes-BenzSLK (R171)Facelift 2008SLK 350 V6
722 km
448 mi
Mercedes-BenzSLK (R172)SLK 250
909 km
565 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
Mercedes-BenzSLK (R171)Facelift 2008SLK 350 V6
305 hp
227 kW
5.4 s
Unrestricted
270 km/h168 mph
Restricted
250 km/h155 mph
Mercedes-BenzSLK (R172)SLK 250
204 hp
152 kW
6.6 s
243 km/h
151 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 (R171)Facelift 2008SLK 350 V6
Power
305 hp
227 kW
0-100 km/h5.4 s
Top speed
Unrestricted
270 km/h168 mph
Restricted
250 km/h155 mph
Doors/seats
2 doors
2 seats
Trunk
208 L
7.3 cu ft
Length
4,107 mm
161.7 in
Height
1,298 mm
51.1 in
Mercedes-BenzSLK (R172)SLK 250
Power
204 hp
152 kW
0-100 km/h6.6 s
Top speed
243 km/h
151 mph
Doors/seats
2 doors
2 seats
Trunk
225 L
7.9 cu ft
Length
4,134 mm
162.8 in
Height
1,303 mm
51.3 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 (R171)Facelift 2008SLK 350 V6
Power
305 hp
227 kW
0-100 km/h5.4 s
Top speed
Unrestricted
270 km/h168 mph
Restricted
250 km/h155 mph
9.7 L/100 km
24.2 mpg US
29.1 mpg UK
Mercedes-BenzSLK (R172)SLK 250
Power
204 hp
152 kW
0-100 km/h6.6 s
Top speed
243 km/h
151 mph
6.6 L/100 km
35.6 mpg US
42.8 mpg UK

Mercedes-Benz SLK (R171) Facelift 2008 SLK 350 V6 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 (R171)Facelift 2008SLK 350 V6
9.7 L/100 km
24.2 mpg US
29.1 mpg UK
5.4 s
Mercedes-BenzSLK (R172)SLK 250
6.6 L/100 km
35.6 mpg US
42.8 mpg UK
6.6 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-BenzSLK (R171)Facelift 2008SLK 350 V6
213 hp/t
159 kW/t
4.7 kg/hp
9.7 L/100 km
24.2 mpg US
29.1 mpg UK
Mercedes-BenzSLK (R172)SLK 250
143 hp/t
107 kW/t
7.0 kg/hp
6.6 L/100 km
35.6 mpg US
42.8 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleMercedes-BenzSLK (R171)Facelift 2008SLK 350 V6Mercedes-BenzSLK (R172)SLK 250
Power
305 hp
227 kW
204 hp
152 kW
Torque
360 Nm
266 lb-ft
310 Nm
229 lb-ft
Acceleration
5.4 s
6.6 s
Top speed
Unrestricted
270 km/h168 mph
Restricted
250 km/h155 mph
243 km/h
151 mph
Lightness
1,430 kg
3,153 lb
1,425 kg
3,142 lb
Fuel consumption
9.7 L/100 km
24.2 mpg US
29.1 mpg UK
6.6 L/100 km
35.6 mpg US
42.8 mpg UK
Practicality
Doors/seats
2 doors
2 seats
Trunk
208 L
7.3 cu ft
Length
4,107 mm
161.7 in
Height
1,298 mm
51.1 in
Doors/seats
2 doors
2 seats
Trunk
225 L
7.9 cu ft
Length
4,134 mm
162.8 in
Height
1,303 mm
51.3 in
Range score
722 km
448 mi
909 km
565 mi
Trunk score
208 L
7.3 cu ft
225 L
7.9 cu ft
Power-to-weight score
213 hp/t
159 kW/t
4.7 kg/hp
143 hp/t
107 kW/t
7.0 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 (R171) Facelift 2008 SLK 350 V6Mercedes-Benz SLK (R172) SLK 250
Consumption9.7 L/100 km24.2 mpg US29.1 mpg UK6.6 L/100 km35.6 mpg US42.8 mpg UK
Cost / 100 km16.97 LC100 km11.55 LC100 km
Cost / 100 mi27.32 LC100 mi18.59 LC100 mi
Annual fuel used1,455 L384 US gal320 UK gal990 L262 US gal218 UK gal
Annual fuel cost2,546 LC/year1,733 LC/year

Head-to-head comparisons

Mercedes-Benz SLK (R171) Facelift 2008 SLK 350 V6

  • Has 101 hp more
  • Has 50 Nm more
  • Is 1.2 s quicker from 0-100 km/h
  • Has 27 km/h (17 mph) higher top speed
  • Has 70 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

Mercedes-Benz SLK (R172) SLK 250

  • Is 5 kg lighter
  • Uses 3.1 L/100 km less fuel
  • Has 187 km (116 mi) more estimated range
  • Has 17 L more trunk volume

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

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Model
Generation
Engine or modification
Mercedes-Benz SLK (R171) SLK 350 V6
Mercedes-Benz SLK (R172) SLK 250
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Mercedes-Benz SLK (R171) · Facelift 2008 SLK 350 V6 vs Mercedes-Benz SLK (R172) SLK 250 - car comparison - FastVsFaster