Car comparison

BMW Z4 (G29) 20ivsMercedes-Benz SLK (R172) SLK 200 2.0

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

New comparison

BMW Z4 (G29)

20i

197 hp1998 ccGasolineRWDManualTurbochargedRoadster2018-2022
VS

Mercedes-Benz SLK (R172)

SLK 200 2.0

184 hp1991 ccGasolineRWDManualTurbochargedRoadster2015-2016

Comparison overview

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

Best choices

BMW Z4 (G29) 20i

  • Quickest 0-100 km/h
    6.8 s
  • Fastest top speed
    241 km/h
    150 mph
  • Most powerful
    197 hp
    147 kW
  • Highest torque
    320 Nm
    236 lb-ft
  • Best power-to-weight
    139 hp/t
    103 kW/t
    7.2 kg/hp
  • Largest trunk
    281 L
  • Best overall score
    47/100
  • Best performance score
    54/100
  • Best practicality score
    32/100

Mercedes-Benz SLK (R172) SLK 200 2.0

  • Lightest
    1,380 kg
    3,042 lb
  • Lowest combined fuel consumption
    6.6 L/100 km
    35.6 mpg US
    42.8 mpg UK
  • Lowest city consumption
    8.8 L/100 km
    26.7 mpg US
    32.1 mpg UK
  • Lowest highway consumption
    5.4 L/100 km
    43.6 mpg US
    52.3 mpg UK
  • Best estimated range
    909 km
    565 mi
  • Best economy score
    89/100

Specification comparison

Specification comparison
ModelBMWZ4 (G29)20iMercedes-BenzSLK (R172)SLK 200 2.0
Power
197hp147kW
184hp137kW
Torque
320Nm236lb-ft
300Nm221lb-ft
Curb weight
1,420kg3,131lb
1,380kg3,042lb
Gross weight
1,725kg3,803lb
1,770kg3,902lb
Top speed
241 km/h
150 mph
240 km/h
149 mph
To 99% top speed
80.6s99% target: 239 km/h / 148 mph
Calculated
82.7s99% target: 238 km/h / 148 mph
Calculated
0-100 km/h
6.8s
7.0s
0-200 km/h
26.9s
Calculated
27.9s
Calculated
0-60 mph
6.5s
Calculated
6.6s
Calculated
Fuel consumption
6.9L/100 km34.1mpg US40.9mpg UK
6.6L/100 km35.6mpg US42.8mpg UK
Fuel consumption city
9.1L/100 km25.8mpg US31.0mpg UK
8.8L/100 km26.7mpg US32.1mpg UK
Fuel consumption highway
5.6L/100 km42mpg US50.4mpg UK
5.4L/100 km43.6mpg US52.3mpg UK
Quarter mile
14.8s
Calculated
15.0s
Calculated
Power-to-weight
139hp/t103kW/t63hp/1000 lb
Calculated
133hp/t99kW/t60hp/1000 lb
Calculated
Torque-to-weight
225Nm/t151lb-ft/ton
Calculated
217Nm/t145lb-ft/ton
Calculated
Estimated range
754km468mi
Calculated
909km565mi
Calculated
Displacement
1,998cc122cu in
1,991cc121cu in
Length
4,324mm170in
4,134mm163in
Width
1,864mm73in
1,810mm71in
Height
1,304mm51in
1,301mm51in
Wheelbase
2,470mm97in
2,430mm96in
Front track
1,609mm63in
1,559mm61in
Rear track
1,616mm64in
1,565mm62in
Ground clearance
117mm5in
-
Trunk volume
281L
225L
Max trunk volume-
335L
Doors
2
2
Seats
2
2
Fuel tank
52L
60L

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 (G29) 20iMercedes-Benz SLK (R172) SLK 200 2.0PowerTorque
  • BMW Z4 (G29) 20i: Power / Torque
  • Mercedes-Benz SLK (R172) SLK 200 2.0: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
BMWZ4 (G29)20i4,500-6,500 rpm1,450-4,200 rpm6,750 rpm
Mercedes-BenzSLK (R172)SLK 200 2.05,500 rpm1,200-4,000 rpm5,750 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricBMWZ4 (G29)20iMercedes-BenzSLK (R172)SLK 200 2.0
Acceleration checkpoints
0-60 mph
0-97 km/h
6.5 s
6.6 s
0-100 km/h
0-62 mph
6.8 s
7.0 s
0-200 km/h
0-124 mph
26.9 s
27.9 s
Top speed
241 km/h
150 mph
240 km/h
149 mph
Drag race simulation
60 ft
18 m
2.5 s
2.5 s
330 ft
101 m
6.5 s
6.6 s
1/8 mile
201 m
9.7 s
9.8 s
1000 ft
305 m
12.5 s
12.6 s
1/4 mile
402 m
14.8 s
15.0 s
Trap speed
1/4 mile
402 m
157 km/h
98 mph
155 km/h
97 mph

Power comparison

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

Chart data table
VehicleValue
BMWZ4 (G29)20i
197 hp
147 kW
Mercedes-BenzSLK (R172)SLK 200 2.0
184 hp
137 kW

BMW Z4 (G29) 20i has 13 hp more than Mercedes-Benz SLK (R172) SLK 200 2.0.

The biggest power difference is between Mercedes-Benz SLK (R172) SLK 200 2.0 and BMW Z4 (G29) 20i: 13 hp (10 kW).

Torque comparison

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

Chart data table
VehicleValue
BMWZ4 (G29)20i
320 Nm
236 lb-ft
Mercedes-BenzSLK (R172)SLK 200 2.0
300 Nm
221 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
BMWZ4 (G29)20i
1,420 kg
3,131 lb
Mercedes-BenzSLK (R172)SLK 200 2.0
1,380 kg
3,042 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 (G29)20i
241 km/h
150 mph
Mercedes-BenzSLK (R172)SLK 200 2.0
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
BMWZ4 (G29)20i6.8 s
Mercedes-BenzSLK (R172)SLK 200 2.07.0 s

The biggest 0-100 km/h difference is between BMW Z4 (G29) 20i and Mercedes-Benz SLK (R172) SLK 200 2.0: 0.2 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 (G29)20i
6.9 L/100 km
34.1 mpg US
40.9 mpg UK
Mercedes-BenzSLK (R172)SLK 200 2.0
6.6 L/100 km
35.6 mpg US
42.8 mpg UK

Power-to-weight comparison

Bar comparison chart for Power-to-weight. Higher is better · hp/t / kW/t

Chart data table
VehicleValue
BMWZ4 (G29)20i
139 hp/t
103 kW/t
7.2 kg/hp
Mercedes-BenzSLK (R172)SLK 200 2.0
133 hp/t
99 kW/t
7.5 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
BMWZ4 (G29)20i
754 km
468 mi
Mercedes-BenzSLK (R172)SLK 200 2.0
909 km
565 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
BMWZ4 (G29)20i
197 hp
147 kW
6.8 s
241 km/h
150 mph
Mercedes-BenzSLK (R172)SLK 200 2.0
184 hp
137 kW
7.0 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
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
Mercedes-BenzSLK (R172)SLK 200 2.0
Power
184 hp
137 kW
0-100 km/h7.0 s
Top speed
240 km/h
149 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 (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-BenzSLK (R172)SLK 200 2.0
Power
184 hp
137 kW
0-100 km/h7.0 s
Top speed
240 km/h
149 mph
6.6 L/100 km
35.6 mpg US
42.8 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
BMWZ4 (G29)20i
6.9 L/100 km
34.1 mpg US
40.9 mpg UK
6.8 s
Mercedes-BenzSLK (R172)SLK 200 2.0
6.6 L/100 km
35.6 mpg US
42.8 mpg UK
7.0 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 (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
Mercedes-BenzSLK (R172)SLK 200 2.0
133 hp/t
99 kW/t
7.5 kg/hp
6.6 L/100 km
35.6 mpg US
42.8 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleBMWZ4 (G29)20iMercedes-BenzSLK (R172)SLK 200 2.0
Power
197 hp
147 kW
184 hp
137 kW
Torque
320 Nm
236 lb-ft
300 Nm
221 lb-ft
Acceleration
6.8 s
7.0 s
Top speed
241 km/h
150 mph
240 km/h
149 mph
Lightness
1,420 kg
3,131 lb
1,380 kg
3,042 lb
Fuel consumption
6.9 L/100 km
34.1 mpg US
40.9 mpg UK
6.6 L/100 km
35.6 mpg US
42.8 mpg UK
Practicality
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
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
754 km
468 mi
909 km
565 mi
Trunk score
281 L
9.9 cu ft
225 L
7.9 cu ft
Power-to-weight score
139 hp/t
103 kW/t
7.2 kg/hp
133 hp/t
99 kW/t
7.5 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 (G29) 20iMercedes-Benz SLK (R172) SLK 200 2.0
Consumption6.9 L/100 km34.1 mpg US40.9 mpg UK6.6 L/100 km35.6 mpg US42.8 mpg UK
Cost / 100 km12.08 LC100 km11.55 LC100 km
Cost / 100 mi19.43 LC100 mi18.59 LC100 mi
Annual fuel used1,035 L273 US gal228 UK gal990 L262 US gal218 UK gal
Annual fuel cost1,811 LC/year1,733 LC/year

Head-to-head comparisons

BMW Z4 (G29) 20i

  • Has 13 hp more
  • Has 20 Nm more
  • Is 0.2 s quicker from 0-100 km/h
  • Has 1 km/h (1 mph) higher top speed
  • Has 5 hp/t better power-to-weight
  • Has 56 L more trunk volume

Pros

  • Quickest 0-100 km/h in this comparison
  • Highest top speed
  • Most powerful
  • Highest torque
  • Best power-to-weight ratio
  • Largest trunk

Cons

  • Highest combined fuel consumption
  • Heaviest

Mercedes-Benz SLK (R172) SLK 200 2.0

  • Is 40 kg lighter
  • Uses 0.3 L/100 km less fuel
  • Has 155 km (97 mi) more estimated range

Pros

  • Lightest
  • Lowest combined fuel consumption
  • Best estimated range

Cons

  • Slowest 0-100 km/h
  • Lowest power
  • Lowest top speed
  • Smallest trunk

Choose cars to compare

Brand
Model
Generation
Engine or modification
BMW Z4 (G29) 20i
Mercedes-Benz SLK (R172) SLK 200 2.0
Compare selected cars
2 vehicles selected

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