Car comparison

Mercedes-Benz SLK (R172) SLK 250vsBMW Z4 (G29) 20i

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

New comparison

Mercedes-Benz SLK (R172)

SLK 250

204 hp1796 ccGasolineRWDAutomaticTurbochargedRoadster2011-2015
VS

BMW Z4 (G29)

20i

197 hp1998 ccGasolineRWDAutomaticTurbochargedRoadster2018-2022

Comparison overview

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

Best choices

BMW Z4 (G29) 20i

  • Highest torque
    320 Nm
    236 lb-ft
  • Lowest combined fuel consumption
    6.0 L/100 km
    39.2 mpg US
    47.1 mpg UK
  • Lowest city consumption
    7.2 L/100 km
    32.7 mpg US
    39.2 mpg UK
  • Lowest highway consumption
    5.2 L/100 km
    45.2 mpg US
    54.3 mpg UK
  • Largest trunk
    281 L
  • Best overall score
    48/100
  • Best economy score
    91/100
  • Best practicality score
    32/100

Mercedes-Benz SLK (R172) SLK 250

  • Quickest 0-100 km/h
    6.6 s
  • Fastest top speed
    243 km/h
    151 mph
  • Most powerful
    204 hp
    152 kW
  • Lightest
    1,425 kg
    3,142 lb
  • Best power-to-weight
    143 hp/t
    107 kW/t
    7.0 kg/hp
  • Best estimated range
    909 km
    565 mi
  • Best performance score
    55/100

Specification comparison

Specification comparison
ModelMercedes-BenzSLK (R172)SLK 250BMWZ4 (G29)20i
Power
204hp152kW
197hp147kW
Torque
310Nm229lb-ft
320Nm236lb-ft
Curb weight
1,425kg3,142lb
1,430kg3,153lb
Gross weight
1,815kg4,001lb
1,740kg3,836lb
Top speed
243 km/h
151 mph
240 km/h
149 mph
To 99% top speed
80.9s99% target: 241 km/h / 149 mph
Calculated
77.9s99% target: 238 km/h / 148 mph
Calculated
0-100 km/h
6.6s
6.6s
0-200 km/h
26.0s
Calculated
26.3s
Calculated
0-60 mph
6.3s
Calculated
6.3s
Calculated
Fuel consumption
6.6L/100 km35.6mpg US42.8mpg UK
6L/100 km39.2mpg US47.1mpg UK
Fuel consumption city
8.7L/100 km27mpg US32.5mpg UK
7.2L/100 km32.7mpg US39.2mpg UK
Fuel consumption highway
5.4L/100 km43.6mpg US52.3mpg UK
5.2L/100 km45.2mpg US54.3mpg UK
Quarter mile
14.6s
Calculated
14.6s
Calculated
Power-to-weight
143hp/t107kW/t65hp/1000 lb
Calculated
138hp/t103kW/t62hp/1000 lb
Calculated
Torque-to-weight
218Nm/t146lb-ft/ton
Calculated
224Nm/t150lb-ft/ton
Calculated
Estimated range
909km565mi
Calculated
867km539mi
Calculated
Displacement
1,796cc110cu in
1,998cc122cu in
Length
4,134mm163in
4,324mm170in
Width
1,810mm71in
1,864mm73in
Height
1,303mm51in
1,304mm51in
Wheelbase
2,430mm96in
2,470mm97in
Front track
1,551mm61in
1,609mm63in
Rear track
1,568mm62in
1,616mm64in
Ground clearance-
117mm5in
Trunk volume
225L
281L
Max trunk volume
335L
-
Doors
2
2
Seats
2
2
Fuel tank
60L
52L

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 (R172) SLK 250BMW Z4 (G29) 20iPowerTorque
  • Mercedes-Benz SLK (R172) SLK 250: Power / Torque
  • BMW Z4 (G29) 20i: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
Mercedes-BenzSLK (R172)SLK 2505,500 rpm2,000-4,300 rpm5,750 rpm
BMWZ4 (G29)20i4,500-6,500 rpm1,450-4,200 rpm6,750 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricMercedes-BenzSLK (R172)SLK 250BMWZ4 (G29)20i
Acceleration checkpoints
0-60 mph
0-97 km/h
6.3 s
6.3 s
0-100 km/h
0-62 mph
6.6 s
6.6 s
0-200 km/h
0-124 mph
26.0 s
26.3 s
Top speed
243 km/h
151 mph
240 km/h
149 mph
Drag race simulation
60 ft
18 m
2.4 s
2.4 s
330 ft
101 m
6.4 s
6.4 s
1/8 mile
201 m
9.6 s
9.6 s
1000 ft
305 m
12.3 s
12.3 s
1/4 mile
402 m
14.6 s
14.6 s
Trap speed
1/4 mile
402 m
158 km/h
98 mph
158 km/h
98 mph

Power comparison

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

Chart data table
VehicleValue
Mercedes-BenzSLK (R172)SLK 250
204 hp
152 kW
BMWZ4 (G29)20i
197 hp
147 kW

Mercedes-Benz SLK (R172) SLK 250 has 7 hp more than BMW Z4 (G29) 20i.

The biggest power difference is between BMW Z4 (G29) 20i and Mercedes-Benz SLK (R172) SLK 250: 7 hp (5 kW).

Torque comparison

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

Chart data table
VehicleValue
Mercedes-BenzSLK (R172)SLK 250
310 Nm
229 lb-ft
BMWZ4 (G29)20i
320 Nm
236 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
Mercedes-BenzSLK (R172)SLK 250
1,425 kg
3,142 lb
BMWZ4 (G29)20i
1,430 kg
3,153 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 (R172)SLK 250
243 km/h
151 mph
BMWZ4 (G29)20i
240 km/h
149 mph

0-100 km/h comparison

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

Chart data table
VehicleValue
Mercedes-BenzSLK (R172)SLK 2506.6 s
BMWZ4 (G29)20i6.6 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 (R172)SLK 250
6.6 L/100 km
35.6 mpg US
42.8 mpg UK
BMWZ4 (G29)20i
6.0 L/100 km
39.2 mpg US
47.1 mpg UK

The biggest fuel consumption difference is between BMW Z4 (G29) 20i and Mercedes-Benz SLK (R172) SLK 250: 0.6 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 (R172)SLK 250
143 hp/t
107 kW/t
7.0 kg/hp
BMWZ4 (G29)20i
138 hp/t
103 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 (R172)SLK 250
909 km
565 mi
BMWZ4 (G29)20i
867 km
539 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
Mercedes-BenzSLK (R172)SLK 250
204 hp
152 kW
6.6 s
243 km/h
151 mph
BMWZ4 (G29)20i
197 hp
147 kW
6.6 s
240 km/h
149 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 (R172)SLK 250
Power
204 hp
152 kW
0-100 km/h6.6 s
Top speed
243 km/h
151 mph
Doors/seats
2 doors
2 seats
Trunk
225 L
7.9 cu ft
Length
4,134 mm
162.8 in
Height
1,303 mm
51.3 in
BMWZ4 (G29)20i
Power
197 hp
147 kW
0-100 km/h6.6 s
Top speed
240 km/h
149 mph
Doors/seats
2 doors
2 seats
Trunk
281 L
9.9 cu ft
Length
4,324 mm
170.2 in
Height
1,304 mm
51.3 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 (R172)SLK 250
Power
204 hp
152 kW
0-100 km/h6.6 s
Top speed
243 km/h
151 mph
6.6 L/100 km
35.6 mpg US
42.8 mpg UK
BMWZ4 (G29)20i
Power
197 hp
147 kW
0-100 km/h6.6 s
Top speed
240 km/h
149 mph
6.0 L/100 km
39.2 mpg US
47.1 mpg UK

BMW Z4 (G29) 20i 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 (R172)SLK 250
6.6 L/100 km
35.6 mpg US
42.8 mpg UK
6.6 s
BMWZ4 (G29)20i
6.0 L/100 km
39.2 mpg US
47.1 mpg UK
6.6 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 (R172)SLK 250
143 hp/t
107 kW/t
7.0 kg/hp
6.6 L/100 km
35.6 mpg US
42.8 mpg UK
BMWZ4 (G29)20i
138 hp/t
103 kW/t
7.3 kg/hp
6.0 L/100 km
39.2 mpg US
47.1 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleMercedes-BenzSLK (R172)SLK 250BMWZ4 (G29)20i
Power
204 hp
152 kW
197 hp
147 kW
Torque
310 Nm
229 lb-ft
320 Nm
236 lb-ft
Acceleration
6.6 s
6.6 s
Top speed
243 km/h
151 mph
240 km/h
149 mph
Lightness
1,425 kg
3,142 lb
1,430 kg
3,153 lb
Fuel consumption
6.6 L/100 km
35.6 mpg US
42.8 mpg UK
6.0 L/100 km
39.2 mpg US
47.1 mpg UK
Practicality
Doors/seats
2 doors
2 seats
Trunk
225 L
7.9 cu ft
Length
4,134 mm
162.8 in
Height
1,303 mm
51.3 in
Doors/seats
2 doors
2 seats
Trunk
281 L
9.9 cu ft
Length
4,324 mm
170.2 in
Height
1,304 mm
51.3 in
Range score
909 km
565 mi
867 km
539 mi
Trunk score
225 L
7.9 cu ft
281 L
9.9 cu ft
Power-to-weight score
143 hp/t
107 kW/t
7.0 kg/hp
138 hp/t
103 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 (R172) SLK 250BMW Z4 (G29) 20i
Consumption6.6 L/100 km35.6 mpg US42.8 mpg UK6 L/100 km39.2 mpg US47.1 mpg UK
Cost / 100 km11.55 LC100 km10.50 LC100 km
Cost / 100 mi18.59 LC100 mi16.90 LC100 mi
Annual fuel used990 L262 US gal218 UK gal900 L238 US gal198 UK gal
Annual fuel cost1,733 LC/year1,575 LC/year

Head-to-head comparisons

Mercedes-Benz SLK (R172) SLK 250

  • Has 7 hp more
  • Is 5 kg lighter
  • Has 3 km/h (2 mph) higher top speed
  • Has 5 hp/t better power-to-weight
  • Has 42 km (26 mi) more estimated range

Pros

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

Cons

  • Highest combined fuel consumption
  • Smallest trunk

BMW Z4 (G29) 20i

  • Has 10 Nm more
  • Uses 0.6 L/100 km less fuel
  • Has 56 L more trunk volume

Pros

  • Highest torque
  • Lowest combined fuel consumption
  • Largest trunk

Cons

  • Lowest power
  • Heaviest
  • Lowest top speed

Choose cars to compare

Brand
Model
Generation
Engine or modification
Mercedes-Benz SLK (R172) SLK 250
BMW Z4 (G29) 20i
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