Car comparison

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

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 ccGasolineRWDAutomaticNaturally aspiratedRoadster2008-2011
VS

Mercedes-Benz SLK (R172)

SLK 250 CDI

204 hp2143 ccDieselRWDManualTwin-turboRoadster2012-2015

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
    265 km/h
    165 mph Unrestricted
    250 km/h
    155 mph Restricted
  • Most powerful
    305 hp
    227 kW
  • Lightest
    1,430 kg
    3,153 lb
  • Best power-to-weight
    213 hp/t
    159 kW/t
    4.7 kg/hp
  • Best overall score
    54/100
  • Best performance score
    66/100
  • Best practicality score
    29/100

Mercedes-Benz SLK (R172) SLK 250 CDI

  • Highest torque
    500 Nm
    369 lb-ft
  • Lowest combined fuel consumption
    5.0 L/100 km
    47.0 mpg US
    56.5 mpg UK
  • Lowest city consumption
    6.4 L/100 km
    36.8 mpg US
    44.1 mpg UK
  • Lowest highway consumption
    4.1 L/100 km
    57.4 mpg US
    68.9 mpg UK
  • Best estimated range
    1,200 km
    746 mi
  • Largest trunk
    225 L
  • Best economy score
    93/100

Specification comparison

Specification comparison
ModelMercedes-BenzSLK (R171)Facelift 2008SLK 350 V6Mercedes-BenzSLK (R172)SLK 250 CDI
Power
305hp227kW
204hp152kW
Torque
360Nm266lb-ft
500Nm369lb-ft
Curb weight
1,430kg3,153lb
1,495kg3,296lb
Gross weight
1,800kg3,968lb
1,885kg4,156lb
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Calculated
244 km/h
152 mph
To 99% top speed
68.7s99% target: 262 km/h / 163 mph
Calculated
79.3s99% target: 242 km/h / 150 mph
Calculated
0-100 km/h
5.4s
6.5s
0-200 km/h
18.2s
Calculated
25.3s
Calculated
0-60 mph
5.1s
Calculated
6.2s
Calculated
Fuel consumption
9L/100 km26.1mpg US31.4mpg UK
5L/100 km47mpg US56.5mpg UK
Fuel consumption city
12.6L/100 km18.7mpg US22.4mpg UK
6.4L/100 km36.8mpg US44.1mpg UK
Fuel consumption highway
6.9L/100 km34.1mpg US40.9mpg UK
4.1L/100 km57.4mpg US68.9mpg UK
Quarter mile
13.5s
Calculated
14.6s
Calculated
Power-to-weight
213hp/t159kW/t97hp/1000 lb
Calculated
136hp/t102kW/t62hp/1000 lb
Calculated
Torque-to-weight
252Nm/t168lb-ft/ton
Calculated
334Nm/t224lb-ft/ton
Calculated
Estimated range
778km483mi
Calculated
1,200km746mi
Calculated
Displacement
3,498cc213cu in
2,143cc131cu in
Length
4,107mm162in
4,134mm163in
Width
1,788mm70in
1,810mm71in
Height
1,298mm51in
1,301mm51in
Wheelbase
2,430mm96in
2,430mm96in
Front track
1,525mm60in
1,559mm61in
Rear track
1,550mm61in
1,565mm62in
Trunk volume
208L
225L
Max trunk volume-
335L
Doors
2
2
Seats
2
2
Fuel tank
70L
60L
CO2 emissions-
129g/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 (R171) Facelift 2008 SLK 350 V6Mercedes-Benz SLK (R172) SLK 250 CDIPowerTorque
  • Mercedes-Benz SLK (R171) Facelift 2008 SLK 350 V6: Power / Torque
  • Mercedes-Benz SLK (R172) SLK 250 CDI: 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 250 CDI3,800 rpm1,600-1,800 rpm4,050 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 CDI
Acceleration checkpoints
0-60 mph
0-97 km/h
5.1 s
6.2 s
0-100 km/h
0-62 mph
5.4 s
6.5 s
0-200 km/h
0-124 mph
18.2 s
25.3 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Limited
244 km/h
152 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
9.5 s
1000 ft
305 m
11.4 s
12.3 s
1/4 mile
402 m
13.5 s
14.6 s
Trap speed
1/4 mile
402 m
174 km/h
108 mph
159 km/h
99 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 CDI
204 hp
152 kW

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

The biggest power difference is between Mercedes-Benz SLK (R172) SLK 250 CDI 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 CDI
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 (R171)Facelift 2008SLK 350 V6
1,430 kg
3,153 lb
Mercedes-BenzSLK (R172)SLK 250 CDI
1,495 kg
3,296 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
265 km/h165 mph
Restricted
250 km/h155 mph
Mercedes-BenzSLK (R172)SLK 250 CDI
244 km/h
152 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 250 CDI6.5 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 CDI: 1.1 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
9.0 L/100 km
26.1 mpg US
31.4 mpg UK
Mercedes-BenzSLK (R172)SLK 250 CDI
5.0 L/100 km
47.0 mpg US
56.5 mpg UK

The biggest fuel consumption difference is between Mercedes-Benz SLK (R172) SLK 250 CDI and Mercedes-Benz SLK (R171) Facelift 2008 SLK 350 V6: 4.0 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-BenzSLK (R171)Facelift 2008SLK 350 V6
213 hp/t
159 kW/t
4.7 kg/hp
Mercedes-BenzSLK (R172)SLK 250 CDI
136 hp/t
102 kW/t
7.3 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
778 km
483 mi
Mercedes-BenzSLK (R172)SLK 250 CDI
1,200 km
746 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
265 km/h165 mph
Restricted
250 km/h155 mph
Mercedes-BenzSLK (R172)SLK 250 CDI
204 hp
152 kW
6.5 s
244 km/h
152 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
265 km/h165 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 CDI
Power
204 hp
152 kW
0-100 km/h6.5 s
Top speed
244 km/h
152 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-BenzSLK (R171)Facelift 2008SLK 350 V6
Power
305 hp
227 kW
0-100 km/h5.4 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
9.0 L/100 km
26.1 mpg US
31.4 mpg UK
Mercedes-BenzSLK (R172)SLK 250 CDI
Power
204 hp
152 kW
0-100 km/h6.5 s
Top speed
244 km/h
152 mph
5.0 L/100 km
47.0 mpg US
56.5 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
9.0 L/100 km
26.1 mpg US
31.4 mpg UK
5.4 s
Mercedes-BenzSLK (R172)SLK 250 CDI
5.0 L/100 km
47.0 mpg US
56.5 mpg UK
6.5 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 (R171)Facelift 2008SLK 350 V6
213 hp/t
159 kW/t
4.7 kg/hp
9.0 L/100 km
26.1 mpg US
31.4 mpg UK
Mercedes-BenzSLK (R172)SLK 250 CDI
136 hp/t
102 kW/t
7.3 kg/hp
5.0 L/100 km
47.0 mpg US
56.5 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleMercedes-BenzSLK (R171)Facelift 2008SLK 350 V6Mercedes-BenzSLK (R172)SLK 250 CDI
Power
305 hp
227 kW
204 hp
152 kW
Torque
360 Nm
266 lb-ft
500 Nm
369 lb-ft
Acceleration
5.4 s
6.5 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
244 km/h
152 mph
Lightness
1,430 kg
3,153 lb
1,495 kg
3,296 lb
Fuel consumption
9.0 L/100 km
26.1 mpg US
31.4 mpg UK
5.0 L/100 km
47.0 mpg US
56.5 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
1,301 mm
51.2 in
Range score
778 km
483 mi
1,200 km
746 mi
CO2 score
-
129 g/km
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
136 hp/t
102 kW/t
7.3 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 CDI
Consumption9 L/100 km26.1 mpg US31.4 mpg UK5 L/100 km47 mpg US56.5 mpg UK
Cost / 100 km15.75 LC100 km8.75 LC100 km
Cost / 100 mi25.35 LC100 mi14.08 LC100 mi
Annual fuel used1,350 L357 US gal297 UK gal750 L198 US gal165 UK gal
Annual fuel cost2,363 LC/year1,313 LC/year

Head-to-head comparisons

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

  • Has 101 hp more
  • Is 65 kg lighter
  • Is 1.1 s quicker from 0-100 km/h
  • Has 21 km/h (13 mph) higher top speed
  • Has 77 hp/t better power-to-weight

Pros

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

Cons

  • Highest combined fuel consumption
  • Smallest trunk

Mercedes-Benz SLK (R172) SLK 250 CDI

  • Has 140 Nm more
  • Uses 4.0 L/100 km less fuel
  • Has 422 km (262 mi) more estimated range
  • Has 17 L more trunk volume

Pros

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

Cons

  • Slowest 0-100 km/h
  • Lowest power
  • Heaviest
  • 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 CDI
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Mercedes-Benz SLK (R171) · Facelift 2008 SLK 350 V6 vs Mercedes-Benz SLK (R172) SLK 250 CDI - car comparison - FastVsFaster