Car comparison

Mercedes-Benz SLK (R172) SLK 250 CDIvsBMW 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 CDI

204 hp2143 ccDieselRWDAutomaticTwin-turboRoadster2012-2015
VS

BMW Z4 (G29)

20i

197 hp1998 ccGasolineRWDManualTurbochargedRoadster2018-2022

Comparison overview

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

Best choices

Mercedes-Benz SLK (R172) SLK 250 CDI

  • Quickest 0-100 km/h
    6.7 s
  • Fastest top speed
    243 km/h
    151 mph
  • Most powerful
    204 hp
    152 kW
  • Highest torque
    500 Nm
    369 lb-ft
  • Lowest combined fuel consumption
    5.0 L/100 km
    47.0 mpg US
    56.5 mpg UK
  • Lowest city consumption
    6.2 L/100 km
    37.9 mpg US
    45.6 mpg UK
  • Lowest highway consumption
    4.3 L/100 km
    54.7 mpg US
    65.7 mpg UK
  • Best estimated range
    1,200 km
    746 mi
  • Best overall score
    49/100
  • Best performance score
    58/100
  • Best economy score
    93/100

BMW Z4 (G29) 20i

  • Lightest
    1,420 kg
    3,131 lb
  • Best power-to-weight
    139 hp/t
    103 kW/t
    7.2 kg/hp
  • Largest trunk
    281 L
  • Best practicality score
    32/100

Specification comparison

Specification comparison
ModelMercedes-BenzSLK (R172)SLK 250 CDIBMWZ4 (G29)20i
Power
204hp152kW
197hp147kW
Torque
500Nm369lb-ft
320Nm236lb-ft
Curb weight
1,515kg3,340lb
1,420kg3,131lb
Gross weight
1,905kg4,200lb
1,725kg3,803lb
Top speed
243 km/h
151 mph
241 km/h
150 mph
To 99% top speed
81.6s99% target: 241 km/h / 149 mph
Calculated
80.6s99% target: 239 km/h / 148 mph
Calculated
0-100 km/h
6.7s
6.8s
0-200 km/h
26.3s
Calculated
26.9s
Calculated
0-60 mph
6.4s
Calculated
6.5s
Calculated
Fuel consumption
5L/100 km47mpg US56.5mpg UK
6.9L/100 km34.1mpg US40.9mpg UK
Fuel consumption city
6.2L/100 km37.9mpg US45.6mpg UK
9.1L/100 km25.8mpg US31.0mpg UK
Fuel consumption highway
4.3L/100 km54.7mpg US65.7mpg UK
5.6L/100 km42mpg US50.4mpg UK
Quarter mile
14.7s
Calculated
14.8s
Calculated
Power-to-weight
135hp/t100kW/t61hp/1000 lb
Calculated
139hp/t103kW/t63hp/1000 lb
Calculated
Torque-to-weight
330Nm/t221lb-ft/ton
Calculated
225Nm/t151lb-ft/ton
Calculated
Estimated range
1,200km746mi
Calculated
754km468mi
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
CO2 emissions
132g/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.

Mercedes-Benz SLK (R172) SLK 250 CDIBMW Z4 (G29) 20iPowerTorque
  • Mercedes-Benz SLK (R172) SLK 250 CDI: Power / Torque
  • BMW Z4 (G29) 20i: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
Mercedes-BenzSLK (R172)SLK 250 CDI3,800 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 250 CDIBMWZ4 (G29)20i
Acceleration checkpoints
0-60 mph
0-97 km/h
6.4 s
6.5 s
0-100 km/h
0-62 mph
6.7 s
6.8 s
0-200 km/h
0-124 mph
26.3 s
26.9 s
Top speed
243 km/h
151 mph
241 km/h
150 mph
Drag race simulation
60 ft
18 m
2.4 s
2.5 s
330 ft
101 m
6.4 s
6.5 s
1/8 mile
201 m
9.7 s
9.7 s
1000 ft
305 m
12.4 s
12.5 s
1/4 mile
402 m
14.7 s
14.8 s
Trap speed
1/4 mile
402 m
158 km/h
98 mph
157 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 CDI
204 hp
152 kW
BMWZ4 (G29)20i
197 hp
147 kW

Mercedes-Benz SLK (R172) SLK 250 CDI 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 CDI: 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 CDI
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 250 CDI
1,515 kg
3,340 lb
BMWZ4 (G29)20i
1,420 kg
3,131 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 CDI
243 km/h
151 mph
BMWZ4 (G29)20i
241 km/h
150 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 250 CDI6.7 s
BMWZ4 (G29)20i6.8 s

The biggest 0-100 km/h difference is between Mercedes-Benz SLK (R172) SLK 250 CDI and BMW Z4 (G29) 20i: 0.1 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 CDI
5.0 L/100 km
47.0 mpg US
56.5 mpg UK
BMWZ4 (G29)20i
6.9 L/100 km
34.1 mpg US
40.9 mpg UK

The biggest fuel consumption difference is between Mercedes-Benz SLK (R172) SLK 250 CDI and BMW Z4 (G29) 20i: 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
Mercedes-BenzSLK (R172)SLK 250 CDI
135 hp/t
100 kW/t
7.4 kg/hp
BMWZ4 (G29)20i
139 hp/t
103 kW/t
7.2 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 CDI
1,200 km
746 mi
BMWZ4 (G29)20i
754 km
468 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
Mercedes-BenzSLK (R172)SLK 250 CDI
204 hp
152 kW
6.7 s
243 km/h
151 mph
BMWZ4 (G29)20i
197 hp
147 kW
6.8 s
241 km/h
150 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 CDI
Power
204 hp
152 kW
0-100 km/h6.7 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
1,301 mm
51.2 in
BMWZ4 (G29)20i
Power
197 hp
147 kW
0-100 km/h6.8 s
Top speed
241 km/h
150 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 CDI
Power
204 hp
152 kW
0-100 km/h6.7 s
Top speed
243 km/h
151 mph
5.0 L/100 km
47.0 mpg US
56.5 mpg UK
BMWZ4 (G29)20i
Power
197 hp
147 kW
0-100 km/h6.8 s
Top speed
241 km/h
150 mph
6.9 L/100 km
34.1 mpg US
40.9 mpg UK

Mercedes-Benz SLK (R172) SLK 250 CDI 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 CDI
5.0 L/100 km
47.0 mpg US
56.5 mpg UK
6.7 s
BMWZ4 (G29)20i
6.9 L/100 km
34.1 mpg US
40.9 mpg UK
6.8 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 (R172)SLK 250 CDI
135 hp/t
100 kW/t
7.4 kg/hp
5.0 L/100 km
47.0 mpg US
56.5 mpg UK
BMWZ4 (G29)20i
139 hp/t
103 kW/t
7.2 kg/hp
6.9 L/100 km
34.1 mpg US
40.9 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleMercedes-BenzSLK (R172)SLK 250 CDIBMWZ4 (G29)20i
Power
204 hp
152 kW
197 hp
147 kW
Torque
500 Nm
369 lb-ft
320 Nm
236 lb-ft
Acceleration
6.7 s
6.8 s
Top speed
243 km/h
151 mph
241 km/h
150 mph
Lightness
1,515 kg
3,340 lb
1,420 kg
3,131 lb
Fuel consumption
5.0 L/100 km
47.0 mpg US
56.5 mpg UK
6.9 L/100 km
34.1 mpg US
40.9 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
1,200 km
746 mi
754 km
468 mi
CO2 score
132 g/km
-
Trunk score
225 L
7.9 cu ft
281 L
9.9 cu ft
Power-to-weight score
135 hp/t
100 kW/t
7.4 kg/hp
139 hp/t
103 kW/t
7.2 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 250 CDIBMW Z4 (G29) 20i
Consumption5 L/100 km47 mpg US56.5 mpg UK6.9 L/100 km34.1 mpg US40.9 mpg UK
Cost / 100 km8.75 LC100 km12.08 LC100 km
Cost / 100 mi14.08 LC100 mi19.43 LC100 mi
Annual fuel used750 L198 US gal165 UK gal1,035 L273 US gal228 UK gal
Annual fuel cost1,313 LC/year1,811 LC/year

Head-to-head comparisons

Mercedes-Benz SLK (R172) SLK 250 CDI

  • Has 7 hp more
  • Has 180 Nm more
  • Is 0.1 s quicker from 0-100 km/h
  • Has 2 km/h (1 mph) higher top speed
  • Uses 1.9 L/100 km less fuel
  • Has 446 km (277 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 95 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

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

Choose cars to compare

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