Car comparison

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

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

New comparison

Mercedes-Benz SLK (R172)

SLK 250d

204 hp2143 ccDieselRWDAutomaticTwin-turboRoadster2015-2016
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

Mercedes-Benz SLK (R172) SLK 250d

  • Quickest 0-100 km/h
    6.6 s
  • Fastest top speed
    245 km/h
    152 mph
  • Most powerful
    204 hp
    152 kW
  • Highest torque
    500 Nm
    369 lb-ft
  • Lowest combined fuel consumption
    4.7 L/100 km
    50.0 mpg US
    60.1 mpg UK
  • Lowest city consumption
    5.5 L/100 km
    42.8 mpg US
    51.4 mpg UK
  • Lowest highway consumption
    4.2 L/100 km
    56.0 mpg US
    67.3 mpg UK
  • Best estimated range
    1,277 km
    793 mi
  • Best overall score
    49/100
  • Best performance score
    59/100
  • Best economy score
    94/100

BMW Z4 (G29) 20i

  • Lightest
    1,430 kg
    3,153 lb
  • Best power-to-weight
    138 hp/t
    103 kW/t
    7.3 kg/hp
  • Largest trunk
    281 L
  • Best practicality score
    32/100

Specification comparison

Specification comparison
ModelMercedes-BenzSLK (R172)SLK 250dBMWZ4 (G29)20i
Power
204hp152kW
197hp147kW
Torque
500Nm369lb-ft
320Nm236lb-ft
Curb weight
1,530kg3,373lb
1,430kg3,153lb
Gross weight
1,905kg4,200lb
1,740kg3,836lb
Top speed
245 km/h
152 mph
240 km/h
149 mph
To 99% top speed
81.7s99% target: 243 km/h / 151 mph
Calculated
77.9s99% target: 238 km/h / 148 mph
Calculated
0-100 km/h
6.6s
6.6s
0-200 km/h
25.7s
Calculated
26.3s
Calculated
0-60 mph
6.3s
Calculated
6.3s
Calculated
Fuel consumption
4.7L/100 km50mpg US60.1mpg UK
6L/100 km39.2mpg US47.1mpg UK
Fuel consumption city
5.5L/100 km42.8mpg US51.4mpg UK
7.2L/100 km32.7mpg US39.2mpg UK
Fuel consumption highway
4.2L/100 km56mpg US67.3mpg UK
5.2L/100 km45.2mpg US54.3mpg UK
Quarter mile
14.6s
Calculated
14.6s
Calculated
Power-to-weight
133hp/t99kW/t60hp/1000 lb
Calculated
138hp/t103kW/t62hp/1000 lb
Calculated
Torque-to-weight
327Nm/t219lb-ft/ton
Calculated
224Nm/t150lb-ft/ton
Calculated
Estimated range
1,277km793mi
Calculated
867km539mi
Calculated
Displacement
2,143cc131cu in
1,998cc122cu in
Length
4,134mm163in
4,324mm170in
Width
1,810mm71in
1,864mm73in
Height
1,301mm51in
1,304mm51in
Wheelbase
2,430mm96in
2,470mm97in
Front track
1,559mm61in
1,609mm63in
Rear track
1,565mm62in
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 250dBMW Z4 (G29) 20iPowerTorque
  • Mercedes-Benz SLK (R172) SLK 250d: Power / Torque
  • BMW Z4 (G29) 20i: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
Mercedes-BenzSLK (R172)SLK 250d3,800 rpm1,600-1,800 rpm4,050 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 250dBMWZ4 (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
25.7 s
26.3 s
Top speed
245 km/h
152 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
159 km/h
99 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 250d
204 hp
152 kW
BMWZ4 (G29)20i
197 hp
147 kW

Mercedes-Benz SLK (R172) SLK 250d 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 250d: 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 250d
500 Nm
369 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 250d
1,530 kg
3,373 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 250d
245 km/h
152 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 250d6.6 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 250d
4.7 L/100 km
50.0 mpg US
60.1 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 Mercedes-Benz SLK (R172) SLK 250d and BMW Z4 (G29) 20i: 1.3 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 250d
133 hp/t
99 kW/t
7.5 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 250d
1,277 km
793 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 250d
204 hp
152 kW
6.6 s
245 km/h
152 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 250d
Power
204 hp
152 kW
0-100 km/h6.6 s
Top speed
245 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
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 250d
Power
204 hp
152 kW
0-100 km/h6.6 s
Top speed
245 km/h
152 mph
4.7 L/100 km
50.0 mpg US
60.1 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

Mercedes-Benz SLK (R172) SLK 250d 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 250d
4.7 L/100 km
50.0 mpg US
60.1 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 250d
133 hp/t
99 kW/t
7.5 kg/hp
4.7 L/100 km
50.0 mpg US
60.1 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 250dBMWZ4 (G29)20i
Power
204 hp
152 kW
197 hp
147 kW
Torque
500 Nm
369 lb-ft
320 Nm
236 lb-ft
Acceleration
6.6 s
6.6 s
Top speed
245 km/h
152 mph
240 km/h
149 mph
Lightness
1,530 kg
3,373 lb
1,430 kg
3,153 lb
Fuel consumption
4.7 L/100 km
50.0 mpg US
60.1 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
1,301 mm
51.2 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
1,277 km
793 mi
867 km
539 mi
Trunk score
225 L
7.9 cu ft
281 L
9.9 cu ft
Power-to-weight score
133 hp/t
99 kW/t
7.5 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 250dBMW Z4 (G29) 20i
Consumption4.7 L/100 km50 mpg US60.1 mpg UK6 L/100 km39.2 mpg US47.1 mpg UK
Cost / 100 km8.23 LC100 km10.50 LC100 km
Cost / 100 mi13.24 LC100 mi16.90 LC100 mi
Annual fuel used705 L186 US gal155 UK gal900 L238 US gal198 UK gal
Annual fuel cost1,234 LC/year1,575 LC/year

Head-to-head comparisons

Mercedes-Benz SLK (R172) SLK 250d

  • Has 7 hp more
  • Has 180 Nm more
  • Has 5 km/h (3 mph) higher top speed
  • Uses 1.3 L/100 km less fuel
  • Has 410 km (255 mi) more estimated range

Pros

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

Cons

  • Heaviest
  • Smallest trunk

BMW Z4 (G29) 20i

  • Is 100 kg lighter
  • Has 4 hp/t better power-to-weight
  • Has 56 L more trunk volume

Pros

  • Lightest
  • Best power-to-weight ratio
  • Largest trunk

Cons

  • Lowest power
  • Highest combined fuel consumption
  • Lowest top speed

Choose cars to compare

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