Car comparison

Porsche Boxster (987) S 3.2vsMercedes-Benz SLK (R171) SLK 350 V6

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

New comparison

Porsche Boxster (987)

S 3.2

280 hp3179 ccGasolineRWDManualNaturally aspiratedRoadster2004-2006
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

Porsche Boxster (987) S 3.2

  • Quickest 0-100 km/h
    5.5 s
  • Fastest top speed
    268 km/h
    167 mph
  • Most powerful
    280 hp
    209 kW
  • Lightest
    1,345 kg
    2,965 lb
  • Best power-to-weight
    208 hp/t
    155 kW/t
    4.8 kg/hp
  • Lowest highway consumption
    7.7 L/100 km
    30.5 mpg US
    36.7 mpg UK
  • Best overall score
    53/100
  • Best performance score
    65/100

Mercedes-Benz SLK (R171) SLK 350 V6

  • Highest torque
    350 Nm
    258 lb-ft
  • Lowest combined fuel consumption
    10.1 L/100 km
    23.3 mpg US
    28.0 mpg UK
  • Lowest city consumption
    14.2 L/100 km
    16.6 mpg US
    19.9 mpg UK
  • Best estimated range
    693 km
    431 mi
  • Largest trunk
    208 L
  • Best economy score
    80/100
  • Best practicality score
    29/100

Specification comparison

Specification comparison
ModelPorscheBoxster (987)S 3.2Mercedes-BenzSLK (R171)SLK 350 V6
Power
280hp209kW
272hp203kW
Torque
320Nm236lb-ft
350Nm258lb-ft
Curb weight
1,345kg2,965lb
1,390kg3,064lb
Gross weight
1,630kg3,594lb
1,780kg3,924lb
Top speed
268 km/h
167 mph
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Calculated
To 99% top speed
93.7s99% target: 265 km/h / 165 mph
Calculated
69.2s99% target: 257 km/h / 160 mph
Calculated
0-100 km/h
5.5s
5.5s
0-200 km/h
20.9s
19.1s
Calculated
0-60 mph
5.2s
Calculated
5.2s
Calculated
Fuel consumption
10.4L/100 km22.6mpg US27.2mpg UK
10.1L/100 km23.3mpg US28.0mpg UK
Fuel consumption city
15.2L/100 km15.5mpg US18.6mpg UK
14.2L/100 km16.6mpg US19.9mpg UK
Fuel consumption highway
7.7L/100 km30.5mpg US36.7mpg UK
7.8L/100 km30.2mpg US36.2mpg UK
Quarter mile
13.7s
Calculated
13.6s
Calculated
Power-to-weight
208hp/t155kW/t94hp/1000 lb
Calculated
196hp/t146kW/t89hp/1000 lb
Calculated
Torque-to-weight
238Nm/t159lb-ft/ton
Calculated
252Nm/t168lb-ft/ton
Calculated
Estimated range
615km382mi
Calculated
693km431mi
Calculated
Displacement
3,179cc194cu in
3,498cc213cu in
Length
4,329mm170in
4,089mm161in
Width
1,801mm71in
1,788mm70in
Height
1,295mm51in
1,298mm51in
Wheelbase
2,415mm95in
2,430mm96in
Front track
1,486mm59in
1,526mm60in
Rear track
1,528mm60in
1,549mm61in
Ground clearance
121mm5in
-
Trunk volume
130L
208L
Doors
2
2
Seats
2
2
Fuel tank
64L
70L
CO2 emissions
248g/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.

Porsche Boxster (987) S 3.2Mercedes-Benz SLK (R171) SLK 350 V6PowerTorque
  • Porsche Boxster (987) S 3.2: Power / Torque
  • Mercedes-Benz SLK (R171) SLK 350 V6: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
PorscheBoxster (987)S 3.26,200 rpm4,700-6,000 rpm7,200 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
MetricPorscheBoxster (987)S 3.2Mercedes-BenzSLK (R171)SLK 350 V6
Acceleration checkpoints
0-60 mph
0-97 km/h
5.2 s
5.2 s
0-100 km/h
0-62 mph
5.5 s
5.5 s
0-200 km/h
0-124 mph
20.9 s
19.1 s
Top speed
268 km/h
167 mph
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
5.9 s
6.0 s
1/8 mile
201 m
8.9 s
8.9 s
1000 ft
305 m
11.5 s
11.5 s
1/4 mile
402 m
13.7 s
13.6 s
Trap speed
1/4 mile
402 m
167 km/h
104 mph
172 km/h
107 mph

Power comparison

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

Chart data table
VehicleValue
PorscheBoxster (987)S 3.2
280 hp
209 kW
Mercedes-BenzSLK (R171)SLK 350 V6
272 hp
203 kW

Porsche Boxster (987) S 3.2 has 8 hp more than Mercedes-Benz SLK (R171) SLK 350 V6.

The biggest power difference is between Mercedes-Benz SLK (R171) SLK 350 V6 and Porsche Boxster (987) S 3.2: 8 hp (6 kW).

Torque comparison

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

Chart data table
VehicleValue
PorscheBoxster (987)S 3.2
320 Nm
236 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
PorscheBoxster (987)S 3.2
1,345 kg
2,965 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
PorscheBoxster (987)S 3.2
268 km/h
167 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
PorscheBoxster (987)S 3.25.5 s
Mercedes-BenzSLK (R171)SLK 350 V65.5 s

Fuel consumption comparison

Bar comparison chart for Fuel consumption. Lower is better · L/100 km / mpg US / mpg UK

Chart data table
VehicleValue
PorscheBoxster (987)S 3.2
10.4 L/100 km
22.6 mpg US
27.2 mpg UK
Mercedes-BenzSLK (R171)SLK 350 V6
10.1 L/100 km
23.3 mpg US
28.0 mpg UK

Power-to-weight comparison

Bar comparison chart for Power-to-weight. Higher is better · hp/t / kW/t

Chart data table
VehicleValue
PorscheBoxster (987)S 3.2
208 hp/t
155 kW/t
4.8 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
PorscheBoxster (987)S 3.2
615 km
382 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
PorscheBoxster (987)S 3.2
280 hp
209 kW
5.5 s
268 km/h
167 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
PorscheBoxster (987)S 3.2
Power
280 hp
209 kW
0-100 km/h5.5 s
Top speed
268 km/h
167 mph
Doors/seats
2 doors
2 seats
Trunk
130 L
4.6 cu ft
Length
4,329 mm
170.4 in
Height
1,295 mm
51.0 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
PorscheBoxster (987)S 3.2
Power
280 hp
209 kW
0-100 km/h5.5 s
Top speed
268 km/h
167 mph
10.4 L/100 km
22.6 mpg US
27.2 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

Porsche Boxster (987) S 3.2 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
PorscheBoxster (987)S 3.2
10.4 L/100 km
22.6 mpg US
27.2 mpg UK
5.5 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
PorscheBoxster (987)S 3.2
208 hp/t
155 kW/t
4.8 kg/hp
10.4 L/100 km
22.6 mpg US
27.2 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
VehiclePorscheBoxster (987)S 3.2Mercedes-BenzSLK (R171)SLK 350 V6
Power
280 hp
209 kW
272 hp
203 kW
Torque
320 Nm
236 lb-ft
350 Nm
258 lb-ft
Acceleration
5.5 s
5.5 s
Top speed
268 km/h
167 mph
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Lightness
1,345 kg
2,965 lb
1,390 kg
3,064 lb
Fuel consumption
10.4 L/100 km
22.6 mpg US
27.2 mpg UK
10.1 L/100 km
23.3 mpg US
28.0 mpg UK
Practicality
Doors/seats
2 doors
2 seats
Trunk
130 L
4.6 cu ft
Length
4,329 mm
170.4 in
Height
1,295 mm
51.0 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
615 km
382 mi
693 km
431 mi
CO2 score
248 g/km
-
Trunk score
130 L
4.6 cu ft
208 L
7.3 cu ft
Power-to-weight score
208 hp/t
155 kW/t
4.8 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
VehiclePorsche Boxster (987) S 3.2Mercedes-Benz SLK (R171) SLK 350 V6
Consumption10.4 L/100 km22.6 mpg US27.2 mpg UK10.1 L/100 km23.3 mpg US28 mpg UK
Cost / 100 km18.20 LC100 km17.68 LC100 km
Cost / 100 mi29.29 LC100 mi28.45 LC100 mi
Annual fuel used1,560 L412 US gal343 UK gal1,515 L400 US gal333 UK gal
Annual fuel cost2,730 LC/year2,651 LC/year

Head-to-head comparisons

Porsche Boxster (987) S 3.2

  • Has 8 hp more
  • Is 45 kg lighter
  • Has 8 km/h (5 mph) higher top speed
  • Has 12 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 (R171) SLK 350 V6

  • Has 30 Nm more
  • Uses 0.3 L/100 km less fuel
  • Has 78 km (48 mi) more estimated range
  • Has 78 L more trunk volume

Pros

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

Cons

  • Lowest power
  • Heaviest
  • Lowest top speed

Choose cars to compare

Brand
Model
Generation
Engine or modification
Porsche Boxster (987) S 3.2
Mercedes-Benz SLK (R171) SLK 350 V6
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