Car comparison

Mercedes-Benz SLK (R171) SLK 350 V6vsBMW Z4 (E89) 30i

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

New comparison

Mercedes-Benz SLK (R171)

SLK 350 V6

272 hp3498 ccGasolineRWDAutomaticNaturally aspiratedRoadster2004-2007
VS

BMW Z4 (E89)

30i

258 hp2996 ccGasolineRWDManualNaturally aspiratedRoadster2009-2011

Comparison overview

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

Best choices

Mercedes-Benz SLK (R171) SLK 350 V6

  • Quickest 0-100 km/h
    5.5 s
  • Fastest top speed
    260 km/h
    162 mph Unrestricted
    250 km/h
    155 mph Restricted
  • Most powerful
    272 hp
    203 kW
  • Highest torque
    350 Nm
    258 lb-ft
  • Lightest
    1,390 kg
    3,064 lb
  • Best power-to-weight
    196 hp/t
    146 kW/t
    5.1 kg/hp
  • Best estimated range
    693 km
    431 mi
  • Largest trunk
    208 L
  • Best overall score
    53/100
  • Best performance score
    64/100
  • Best practicality score
    29/100

BMW Z4 (E89) 30i

  • Lowest combined fuel consumption
    8.5 L/100 km
    27.7 mpg US
    33.2 mpg UK
  • Lowest city consumption
    12.4 L/100 km
    19.0 mpg US
    22.8 mpg UK
  • Lowest highway consumption
    6.2 L/100 km
    37.9 mpg US
    45.6 mpg UK
  • Best economy score
    84/100

Specification comparison

Specification comparison
ModelMercedes-BenzSLK (R171)SLK 350 V6BMWZ4 (E89)30i
Power
272hp203kW
258hp192kW
Torque
350Nm258lb-ft
315Nm232lb-ft
Curb weight
1,390kg3,064lb
1,490kg3,285lb
Gross weight
1,780kg3,924lb
1,745kg3,847lb
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Calculated
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Calculated
To 99% top speed
69.2s99% target: 257 km/h / 160 mph
Calculated
76.0s99% target: 257 km/h / 160 mph
Calculated
0-100 km/h
5.5s
5.8s
0-200 km/h
19.1s
Calculated
20.5s
Calculated
0-60 mph
5.2s
Calculated
5.5s
Calculated
Fuel consumption
10.1L/100 km23.3mpg US28.0mpg UK
8.5L/100 km27.7mpg US33.2mpg UK
Fuel consumption city
14.2L/100 km16.6mpg US19.9mpg UK
12.4L/100 km19mpg US22.8mpg UK
Fuel consumption highway
7.8L/100 km30.2mpg US36.2mpg UK
6.2L/100 km37.9mpg US45.6mpg UK
Quarter mile
13.6s
Calculated
13.9s
Calculated
Power-to-weight
196hp/t146kW/t89hp/1000 lb
Calculated
173hp/t129kW/t79hp/1000 lb
Calculated
Torque-to-weight
252Nm/t168lb-ft/ton
Calculated
211Nm/t141lb-ft/ton
Calculated
Estimated range
693km431mi
Calculated
647km402mi
Calculated
Displacement
3,498cc213cu in
2,996cc183cu in
Length
4,089mm161in
4,239mm167in
Width
1,788mm70in
1,790mm70in
Height
1,298mm51in
1,291mm51in
Wheelbase
2,430mm96in
2,496mm98in
Front track
1,526mm60in
1,511mm59in
Rear track
1,549mm61in
1,537mm61in
Trunk volume
208L
180L
Max trunk volume-
310L
Doors
2
2
Seats
2
2
Fuel tank
70L
55L

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) SLK 350 V6BMW Z4 (E89) 30iPowerTorque
  • Mercedes-Benz SLK (R171) SLK 350 V6: Power / Torque
  • BMW Z4 (E89) 30i: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
Mercedes-BenzSLK (R171)SLK 350 V66,000 rpm2,400-5,000 rpm6,250 rpm
BMWZ4 (E89)30i6,600 rpm2,500 rpm6,850 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricMercedes-BenzSLK (R171)SLK 350 V6BMWZ4 (E89)30i
Acceleration checkpoints
0-60 mph
0-97 km/h
5.2 s
5.5 s
0-100 km/h
0-62 mph
5.5 s
5.8 s
0-200 km/h
0-124 mph
19.1 s
20.5 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Limited
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Likely limited
Drag race simulation
60 ft
18 m
2.3 s
2.3 s
330 ft
101 m
6.0 s
6.1 s
1/8 mile
201 m
8.9 s
9.1 s
1000 ft
305 m
11.5 s
11.7 s
1/4 mile
402 m
13.6 s
13.9 s
Trap speed
1/4 mile
402 m
172 km/h
107 mph
168 km/h
105 mph

Power comparison

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

Chart data table
VehicleValue
Mercedes-BenzSLK (R171)SLK 350 V6
272 hp
203 kW
BMWZ4 (E89)30i
258 hp
192 kW

Mercedes-Benz SLK (R171) SLK 350 V6 has 14 hp more than BMW Z4 (E89) 30i.

The biggest power difference is between BMW Z4 (E89) 30i and Mercedes-Benz SLK (R171) SLK 350 V6: 14 hp (10 kW).

Torque comparison

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

Chart data table
VehicleValue
Mercedes-BenzSLK (R171)SLK 350 V6
350 Nm
258 lb-ft
BMWZ4 (E89)30i
315 Nm
232 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
Mercedes-BenzSLK (R171)SLK 350 V6
1,390 kg
3,064 lb
BMWZ4 (E89)30i
1,490 kg
3,285 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)SLK 350 V6
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
BMWZ4 (E89)30i
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 (R171)SLK 350 V65.5 s
BMWZ4 (E89)30i5.8 s

The biggest 0-100 km/h difference is between Mercedes-Benz SLK (R171) SLK 350 V6 and BMW Z4 (E89) 30i: 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 (R171)SLK 350 V6
10.1 L/100 km
23.3 mpg US
28.0 mpg UK
BMWZ4 (E89)30i
8.5 L/100 km
27.7 mpg US
33.2 mpg UK

The biggest fuel consumption difference is between BMW Z4 (E89) 30i and Mercedes-Benz SLK (R171) SLK 350 V6: 1.6 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)SLK 350 V6
196 hp/t
146 kW/t
5.1 kg/hp
BMWZ4 (E89)30i
173 hp/t
129 kW/t
5.8 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
Mercedes-BenzSLK (R171)SLK 350 V6
693 km
431 mi
BMWZ4 (E89)30i
647 km
402 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
Mercedes-BenzSLK (R171)SLK 350 V6
272 hp
203 kW
5.5 s
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
BMWZ4 (E89)30i
258 hp
192 kW
5.8 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 (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
BMWZ4 (E89)30i
Power
258 hp
192 kW
0-100 km/h5.8 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Doors/seats
2 doors
2 seats
Trunk
180 L
6.4 cu ft
Length
4,239 mm
166.9 in
Height
1,291 mm
50.8 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 (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
BMWZ4 (E89)30i
Power
258 hp
192 kW
0-100 km/h5.8 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
8.5 L/100 km
27.7 mpg US
33.2 mpg UK

Mercedes-Benz SLK (R171) 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)SLK 350 V6
10.1 L/100 km
23.3 mpg US
28.0 mpg UK
5.5 s
BMWZ4 (E89)30i
8.5 L/100 km
27.7 mpg US
33.2 mpg UK
5.8 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)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
BMWZ4 (E89)30i
173 hp/t
129 kW/t
5.8 kg/hp
8.5 L/100 km
27.7 mpg US
33.2 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleMercedes-BenzSLK (R171)SLK 350 V6BMWZ4 (E89)30i
Power
272 hp
203 kW
258 hp
192 kW
Torque
350 Nm
258 lb-ft
315 Nm
232 lb-ft
Acceleration
5.5 s
5.8 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Lightness
1,390 kg
3,064 lb
1,490 kg
3,285 lb
Fuel consumption
10.1 L/100 km
23.3 mpg US
28.0 mpg UK
8.5 L/100 km
27.7 mpg US
33.2 mpg UK
Practicality
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
Doors/seats
2 doors
2 seats
Trunk
180 L
6.4 cu ft
Length
4,239 mm
166.9 in
Height
1,291 mm
50.8 in
Range score
693 km
431 mi
647 km
402 mi
Trunk score
208 L
7.3 cu ft
180 L
6.4 cu ft
Power-to-weight score
196 hp/t
146 kW/t
5.1 kg/hp
173 hp/t
129 kW/t
5.8 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) SLK 350 V6BMW Z4 (E89) 30i
Consumption10.1 L/100 km23.3 mpg US28 mpg UK8.5 L/100 km27.7 mpg US33.2 mpg UK
Cost / 100 km17.68 LC100 km14.88 LC100 km
Cost / 100 mi28.45 LC100 mi23.94 LC100 mi
Annual fuel used1,515 L400 US gal333 UK gal1,275 L337 US gal280 UK gal
Annual fuel cost2,651 LC/year2,231 LC/year

Head-to-head comparisons

Mercedes-Benz SLK (R171) SLK 350 V6

  • Has 14 hp more
  • Has 35 Nm more
  • Is 100 kg lighter
  • Is 0.3 s quicker from 0-100 km/h
  • Has 23 hp/t better power-to-weight
  • Has 46 km (29 mi) more estimated range
  • Has 28 L more trunk volume

Pros

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

Cons

  • Highest combined fuel consumption

BMW Z4 (E89) 30i

  • Uses 1.6 L/100 km less fuel

Pros

  • Lowest combined fuel consumption

Cons

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

Choose cars to compare

Brand
Model
Generation
Engine or modification
Mercedes-Benz SLK (R171) SLK 350 V6
BMW Z4 (E89) 30i
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