Car comparison

BMW Z4 (E85) 2.5ivsMercedes-Benz SLK (R170) SLK 230 Kompressor

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

New comparison

BMW Z4 (E85)

2.5i

192 hp2494 ccGasolineRWDManualNaturally aspiratedRoadster2002-2006
VS

Mercedes-Benz SLK (R170)

SLK 230 Kompressor

193 hp2295 ccGasolineRWDManualSuperchargedRoadster1996-2000

Comparison overview

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

Best choices

BMW Z4 (E85) 2.5i

  • Quickest 0-100 km/h
    7.0 s
  • Fastest top speed
    235 km/h
    146 mph
  • Lowest combined fuel consumption
    7.4 L/100 km
    31.8 mpg US
    38.2 mpg UK
  • Lowest city consumption
    10.4 L/100 km
    22.6 mpg US
    27.2 mpg UK
  • Lowest highway consumption
    5.7 L/100 km
    41.3 mpg US
    49.6 mpg UK
  • Best estimated range
    743 km
    462 mi
  • Largest trunk
    240 L
  • Best overall score
    45/100
  • Best performance score
    52/100
  • Best economy score
    87/100
  • Best practicality score
    30/100

Specification comparison

Specification comparison
ModelBMWZ4 (E85)2.5iMercedes-BenzSLK (R170)SLK 230 Kompressor
Power
192hp143kW
193hp144kW
Torque
245Nm181lb-ft
280Nm207lb-ft
Curb weight
1,335kg2,943lb
1,250kg2,756lb
Gross weight
1,560kg3,439lb
1,585kg3,494lb
Top speed
235 km/h
146 mph
231 km/h
144 mph
To 99% top speed
80.5s99% target: 233 km/h / 145 mph
Calculated
80.3s99% target: 229 km/h / 142 mph
Calculated
0-100 km/h
7.0s
7.4s
0-200 km/h
29.1s
Calculated
31.2s
Calculated
0-60 mph
6.6s
Calculated
7.0s
Calculated
Fuel consumption
7.4L/100 km31.8mpg US38.2mpg UK
9.3L/100 km25.3mpg US30.4mpg UK
Fuel consumption city
10.4L/100 km22.6mpg US27.2mpg UK
13.3L/100 km17.7mpg US21.2mpg UK
Fuel consumption highway
5.7L/100 km41.3mpg US49.6mpg UK
7L/100 km33.6mpg US40.4mpg UK
Quarter mile
15.0s
Calculated
15.3s
Calculated
Power-to-weight
144hp/t107kW/t65hp/1000 lb
Calculated
154hp/t115kW/t70hp/1000 lb
Calculated
Torque-to-weight
184Nm/t123lb-ft/ton
Calculated
224Nm/t150lb-ft/ton
Calculated
Estimated range
743km462mi
Calculated
570km354mi
Calculated
Displacement
2,494cc152cu in
2,295cc140cu in
Length
4,091mm161in
3,995mm157in
Width
1,781mm70in
1,715mm68in
Height
1,299mm51in
1,284mm51in
Wheelbase
2,495mm98in
2,400mm94in
Front track
1,473mm58in
1,488mm59in
Rear track
1,523mm60in
1,485mm58in
Trunk volume
240L
145L
Max trunk volume
260L
348L
Doors
2
2
Seats
2
2
Fuel tank
55L
53L

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 (E85) 2.5iMercedes-Benz SLK (R170) SLK 230 KompressorPowerTorque
  • BMW Z4 (E85) 2.5i: Power / Torque
  • Mercedes-Benz SLK (R170) SLK 230 Kompressor: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
BMWZ4 (E85)2.5i6,000 rpm3,500 rpm6,250 rpm
Mercedes-BenzSLK (R170)SLK 230 Kompressor5,300 rpm2,500-4,800 rpm5,550 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricBMWZ4 (E85)2.5iMercedes-BenzSLK (R170)SLK 230 Kompressor
Acceleration checkpoints
0-60 mph
0-97 km/h
6.6 s
7.0 s
0-100 km/h
0-62 mph
7.0 s
7.4 s
0-200 km/h
0-124 mph
29.1 s
31.2 s
Top speed
235 km/h
146 mph
231 km/h
144 mph
Drag race simulation
60 ft
18 m
2.5 s
2.6 s
330 ft
101 m
6.5 s
6.7 s
1/8 mile
201 m
9.8 s
10.1 s
1000 ft
305 m
12.6 s
12.9 s
1/4 mile
402 m
15.0 s
15.3 s
Trap speed
1/4 mile
402 m
155 km/h
96 mph
152 km/h
95 mph

Power comparison

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

Chart data table
VehicleValue
BMWZ4 (E85)2.5i
192 hp
143 kW
Mercedes-BenzSLK (R170)SLK 230 Kompressor
193 hp
144 kW

Mercedes-Benz SLK (R170) SLK 230 Kompressor has 1 hp more than BMW Z4 (E85) 2.5i.

The biggest power difference is between BMW Z4 (E85) 2.5i and Mercedes-Benz SLK (R170) SLK 230 Kompressor: 1 hp (1 kW).

Torque comparison

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

Chart data table
VehicleValue
BMWZ4 (E85)2.5i
245 Nm
181 lb-ft
Mercedes-BenzSLK (R170)SLK 230 Kompressor
280 Nm
207 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
BMWZ4 (E85)2.5i
1,335 kg
2,943 lb
Mercedes-BenzSLK (R170)SLK 230 Kompressor
1,250 kg
2,756 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 (E85)2.5i
235 km/h
146 mph
Mercedes-BenzSLK (R170)SLK 230 Kompressor
231 km/h
144 mph

0-100 km/h comparison

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

Chart data table
VehicleValue
BMWZ4 (E85)2.5i7.0 s
Mercedes-BenzSLK (R170)SLK 230 Kompressor7.4 s

Although Mercedes-Benz SLK (R170) SLK 230 Kompressor has more power, BMW Z4 (E85) 2.5i is quicker from 0-100 km/h.

The biggest 0-100 km/h difference is between BMW Z4 (E85) 2.5i and Mercedes-Benz SLK (R170) SLK 230 Kompressor: 0.4 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 (E85)2.5i
7.4 L/100 km
31.8 mpg US
38.2 mpg UK
Mercedes-BenzSLK (R170)SLK 230 Kompressor
9.3 L/100 km
25.3 mpg US
30.4 mpg UK

The biggest fuel consumption difference is between BMW Z4 (E85) 2.5i and Mercedes-Benz SLK (R170) SLK 230 Kompressor: 1.9 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 (E85)2.5i
144 hp/t
107 kW/t
7.0 kg/hp
Mercedes-BenzSLK (R170)SLK 230 Kompressor
154 hp/t
115 kW/t
6.5 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
BMWZ4 (E85)2.5i
743 km
462 mi
Mercedes-BenzSLK (R170)SLK 230 Kompressor
570 km
354 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
BMWZ4 (E85)2.5i
192 hp
143 kW
7.0 s
235 km/h
146 mph
Mercedes-BenzSLK (R170)SLK 230 Kompressor
193 hp
144 kW
7.4 s
231 km/h
144 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 (E85)2.5i
Power
192 hp
143 kW
0-100 km/h7.0 s
Top speed
235 km/h
146 mph
Doors/seats
2 doors
2 seats
Trunk
240 L
8.5 cu ft
Length
4,091 mm
161.1 in
Height
1,299 mm
51.1 in
Mercedes-BenzSLK (R170)SLK 230 Kompressor
Power
193 hp
144 kW
0-100 km/h7.4 s
Top speed
231 km/h
144 mph
Doors/seats
2 doors
2 seats
Trunk
145 L
5.1 cu ft
Length
3,995 mm
157.3 in
Height
1,284 mm
50.6 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 (E85)2.5i
Power
192 hp
143 kW
0-100 km/h7.0 s
Top speed
235 km/h
146 mph
7.4 L/100 km
31.8 mpg US
38.2 mpg UK
Mercedes-BenzSLK (R170)SLK 230 Kompressor
Power
193 hp
144 kW
0-100 km/h7.4 s
Top speed
231 km/h
144 mph
9.3 L/100 km
25.3 mpg US
30.4 mpg UK

BMW Z4 (E85) 2.5i 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 (E85)2.5i
7.4 L/100 km
31.8 mpg US
38.2 mpg UK
7.0 s
Mercedes-BenzSLK (R170)SLK 230 Kompressor
9.3 L/100 km
25.3 mpg US
30.4 mpg UK
7.4 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 (E85)2.5i
144 hp/t
107 kW/t
7.0 kg/hp
7.4 L/100 km
31.8 mpg US
38.2 mpg UK
Mercedes-BenzSLK (R170)SLK 230 Kompressor
154 hp/t
115 kW/t
6.5 kg/hp
9.3 L/100 km
25.3 mpg US
30.4 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleBMWZ4 (E85)2.5iMercedes-BenzSLK (R170)SLK 230 Kompressor
Power
192 hp
143 kW
193 hp
144 kW
Torque
245 Nm
181 lb-ft
280 Nm
207 lb-ft
Acceleration
7.0 s
7.4 s
Top speed
235 km/h
146 mph
231 km/h
144 mph
Lightness
1,335 kg
2,943 lb
1,250 kg
2,756 lb
Fuel consumption
7.4 L/100 km
31.8 mpg US
38.2 mpg UK
9.3 L/100 km
25.3 mpg US
30.4 mpg UK
Practicality
Doors/seats
2 doors
2 seats
Trunk
240 L
8.5 cu ft
Length
4,091 mm
161.1 in
Height
1,299 mm
51.1 in
Doors/seats
2 doors
2 seats
Trunk
145 L
5.1 cu ft
Length
3,995 mm
157.3 in
Height
1,284 mm
50.6 in
Range score
743 km
462 mi
570 km
354 mi
Trunk score
240 L
8.5 cu ft
145 L
5.1 cu ft
Power-to-weight score
144 hp/t
107 kW/t
7.0 kg/hp
154 hp/t
115 kW/t
6.5 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 (E85) 2.5iMercedes-Benz SLK (R170) SLK 230 Kompressor
Consumption7.4 L/100 km31.8 mpg US38.2 mpg UK9.3 L/100 km25.3 mpg US30.4 mpg UK
Cost / 100 km12.95 LC100 km16.28 LC100 km
Cost / 100 mi20.84 LC100 mi26.19 LC100 mi
Annual fuel used1,110 L293 US gal244 UK gal1,395 L369 US gal307 UK gal
Annual fuel cost1,943 LC/year2,441 LC/year

Head-to-head comparisons

BMW Z4 (E85) 2.5i

  • Is 0.4 s quicker from 0-100 km/h
  • Has 4 km/h (2 mph) higher top speed
  • Uses 1.9 L/100 km less fuel
  • Has 173 km (108 mi) more estimated range
  • Has 95 L more trunk volume

Pros

  • Quickest 0-100 km/h in this comparison
  • Highest top speed
  • Lowest combined fuel consumption
  • Best estimated range
  • Largest trunk

Cons

  • Lowest power
  • Heaviest

Mercedes-Benz SLK (R170) SLK 230 Kompressor

  • Has 1 hp more
  • Has 35 Nm more
  • Is 85 kg lighter
  • Has 11 hp/t better power-to-weight

Pros

  • Most powerful
  • Highest torque
  • Lightest
  • Best power-to-weight ratio

Cons

  • Slowest 0-100 km/h
  • Highest combined fuel consumption
  • Lowest top speed
  • Smallest trunk

Choose cars to compare

Brand
Model
Generation
Engine or modification
BMW Z4 (E85) 2.5i
Mercedes-Benz SLK (R170) SLK 230 Kompressor
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