Car comparison

BMW Z4 (E89) 28ivsMercedes-Benz SLK (R172) SLK 250

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

New comparison

BMW Z4 (E89)

28i

245 hp1997 ccGasolineRWDAutomaticTurbochargedRoadster2011-2013
VS

Mercedes-Benz SLK (R172)

SLK 250

204 hp1796 ccGasolineRWDManualTurbochargedRoadster2011-2015

Comparison overview

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

Best choices

BMW Z4 (E89) 28i

  • 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
    245 hp
    183 kW
  • Highest torque
    350 Nm
    258 lb-ft
  • Best power-to-weight
    164 hp/t
    122 kW/t
    6.1 kg/hp
  • Lowest combined fuel consumption
    6.8 L/100 km
    34.6 mpg US
    41.5 mpg UK
  • Lowest city consumption
    9.4 L/100 km
    25.0 mpg US
    30.1 mpg UK
  • Lowest highway consumption
    5.3 L/100 km
    44.4 mpg US
    53.3 mpg UK
  • Lowest CO2 emissions
    159 g/km
  • Best overall score
    52/100
  • Best performance score
    62/100
  • Best economy score
    89/100
  • Best practicality score
    32/100

Specification comparison

Specification comparison
ModelBMWZ4 (E89)28iMercedes-BenzSLK (R172)SLK 250
Power
245hp183kW
204hp152kW
Torque
350Nm258lb-ft
310Nm229lb-ft
Curb weight
1,495kg3,296lb
1,400kg3,086lb
Gross weight
1,750kg3,858lb
1,790kg3,946lb
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Calculated
244 km/h
152 mph
To 99% top speed
73.0s99% target: 257 km/h / 160 mph
Calculated
79.7s99% target: 242 km/h / 150 mph
Calculated
0-100 km/h
5.5s
6.5s
0-200 km/h
19.6s
Calculated
25.4s
Calculated
0-60 mph
5.2s
Calculated
6.2s
Calculated
Fuel consumption
6.8L/100 km34.6mpg US41.5mpg UK
7.3L/100 km32.2mpg US38.7mpg UK
Fuel consumption city
9.4L/100 km25mpg US30.1mpg UK
9.8L/100 km24mpg US28.8mpg UK
Fuel consumption highway
5.3L/100 km44.4mpg US53.3mpg UK
5.8L/100 km40.6mpg US48.7mpg UK
Quarter mile
13.6s
Calculated
14.6s
Calculated
Power-to-weight
164hp/t122kW/t74hp/1000 lb
Calculated
146hp/t109kW/t66hp/1000 lb
Calculated
Torque-to-weight
234Nm/t157lb-ft/ton
Calculated
221Nm/t148lb-ft/ton
Calculated
Estimated range
809km503mi
Calculated
822km511mi
Calculated
Displacement
1,997cc122cu in
1,796cc110cu in
Length
4,239mm167in
4,134mm163in
Width
1,790mm70in
1,810mm71in
Height
1,291mm51in
1,301mm51in
Wheelbase
2,496mm98in
2,430mm96in
Front track
1,511mm59in
1,559mm61in
Rear track
1,559mm61in
1,565mm62in
Trunk volume-
225L
Max trunk volume-
335L
Doors
2
2
Seats
2
2
Fuel tank
55L
60L
CO2 emissions
159g/km
169g/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.

BMW Z4 (E89) 28iMercedes-Benz SLK (R172) SLK 250PowerTorque
  • BMW Z4 (E89) 28i: Power / Torque
  • Mercedes-Benz SLK (R172) SLK 250: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
BMWZ4 (E89)28i5,000-6,500 rpm1,250-4,800 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
MetricBMWZ4 (E89)28iMercedes-BenzSLK (R172)SLK 250
Acceleration checkpoints
0-60 mph
0-97 km/h
5.2 s
6.2 s
0-100 km/h
0-62 mph
5.5 s
6.5 s
0-200 km/h
0-124 mph
19.6 s
25.4 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Likely 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
6.3 s
1/8 mile
201 m
8.9 s
9.5 s
1000 ft
305 m
11.5 s
12.3 s
1/4 mile
402 m
13.6 s
14.6 s
Trap speed
1/4 mile
402 m
171 km/h
106 mph
159 km/h
99 mph

Power comparison

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

Chart data table
VehicleValue
BMWZ4 (E89)28i
245 hp
183 kW
Mercedes-BenzSLK (R172)SLK 250
204 hp
152 kW

BMW Z4 (E89) 28i has 41 hp more than Mercedes-Benz SLK (R172) SLK 250.

The biggest power difference is between Mercedes-Benz SLK (R172) SLK 250 and BMW Z4 (E89) 28i: 41 hp (31 kW).

Torque comparison

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

Chart data table
VehicleValue
BMWZ4 (E89)28i
350 Nm
258 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
BMWZ4 (E89)28i
1,495 kg
3,296 lb
Mercedes-BenzSLK (R172)SLK 250
1,400 kg
3,086 lb

Top speed without limiter comparison

Bar comparison chart for Top speed without limiter. Higher is better · km/h / mph

Chart data table
VehicleValue
BMWZ4 (E89)28i
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Mercedes-BenzSLK (R172)SLK 250
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
BMWZ4 (E89)28i5.5 s
Mercedes-BenzSLK (R172)SLK 2506.5 s

The biggest 0-100 km/h difference is between BMW Z4 (E89) 28i and Mercedes-Benz SLK (R172) SLK 250: 1.0 s.

Fuel consumption comparison

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

Chart data table
VehicleValue
BMWZ4 (E89)28i
6.8 L/100 km
34.6 mpg US
41.5 mpg UK
Mercedes-BenzSLK (R172)SLK 250
7.3 L/100 km
32.2 mpg US
38.7 mpg UK

The biggest fuel consumption difference is between BMW Z4 (E89) 28i and Mercedes-Benz SLK (R172) SLK 250: 0.5 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
BMWZ4 (E89)28i
164 hp/t
122 kW/t
6.1 kg/hp
Mercedes-BenzSLK (R172)SLK 250
146 hp/t
109 kW/t
6.9 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
BMWZ4 (E89)28i
809 km
503 mi
Mercedes-BenzSLK (R172)SLK 250
822 km
511 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
BMWZ4 (E89)28i
245 hp
183 kW
5.5 s
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Mercedes-BenzSLK (R172)SLK 250
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
BMWZ4 (E89)28i
Power
245 hp
183 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-
Length
4,239 mm
166.9 in
Height
1,291 mm
50.8 in
Mercedes-BenzSLK (R172)SLK 250
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
BMWZ4 (E89)28i
Power
245 hp
183 kW
0-100 km/h5.5 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
6.8 L/100 km
34.6 mpg US
41.5 mpg UK
Mercedes-BenzSLK (R172)SLK 250
Power
204 hp
152 kW
0-100 km/h6.5 s
Top speed
244 km/h
152 mph
7.3 L/100 km
32.2 mpg US
38.7 mpg UK

BMW Z4 (E89) 28i 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
BMWZ4 (E89)28i
6.8 L/100 km
34.6 mpg US
41.5 mpg UK
5.5 s
Mercedes-BenzSLK (R172)SLK 250
7.3 L/100 km
32.2 mpg US
38.7 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
BMWZ4 (E89)28i
164 hp/t
122 kW/t
6.1 kg/hp
6.8 L/100 km
34.6 mpg US
41.5 mpg UK
Mercedes-BenzSLK (R172)SLK 250
146 hp/t
109 kW/t
6.9 kg/hp
7.3 L/100 km
32.2 mpg US
38.7 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleBMWZ4 (E89)28iMercedes-BenzSLK (R172)SLK 250
Power
245 hp
183 kW
204 hp
152 kW
Torque
350 Nm
258 lb-ft
310 Nm
229 lb-ft
Acceleration
5.5 s
6.5 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
244 km/h
152 mph
Lightness
1,495 kg
3,296 lb
1,400 kg
3,086 lb
Fuel consumption
6.8 L/100 km
34.6 mpg US
41.5 mpg UK
7.3 L/100 km
32.2 mpg US
38.7 mpg UK
Practicality
Doors/seats
2 doors
2 seats
Trunk-
Length
4,239 mm
166.9 in
Height
1,291 mm
50.8 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
809 km
503 mi
822 km
511 mi
CO2 score
159 g/km
169 g/km
Trunk score
-
225 L
7.9 cu ft
Power-to-weight score
164 hp/t
122 kW/t
6.1 kg/hp
146 hp/t
109 kW/t
6.9 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
VehicleBMW Z4 (E89) 28iMercedes-Benz SLK (R172) SLK 250
Consumption6.8 L/100 km34.6 mpg US41.5 mpg UK7.3 L/100 km32.2 mpg US38.7 mpg UK
Cost / 100 km11.90 LC100 km12.78 LC100 km
Cost / 100 mi19.15 LC100 mi20.56 LC100 mi
Annual fuel used1,020 L269 US gal224 UK gal1,095 L289 US gal241 UK gal
Annual fuel cost1,785 LC/year1,916 LC/year

Head-to-head comparisons

BMW Z4 (E89) 28i

  • Has 41 hp more
  • Has 40 Nm more
  • Is 1.0 s quicker from 0-100 km/h
  • Has 16 km/h (10 mph) higher top speed
  • Uses 0.5 L/100 km less fuel
  • Has 18 hp/t better power-to-weight
  • Emits 10 g/km less CO2

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

Cons

  • Heaviest

Mercedes-Benz SLK (R172) SLK 250

  • Is 95 kg lighter
  • Has 13 km (8 mi) more estimated range

Pros

  • Lightest
  • Best estimated range

Cons

  • Slowest 0-100 km/h
  • Lowest power
  • Highest combined fuel consumption
  • Lowest top speed
  • Highest CO2 emissions

Choose cars to compare

Brand
Model
Generation
Engine or modification
BMW Z4 (E89) 28i
Mercedes-Benz SLK (R172) SLK 250
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