Car comparison

BMW Z4 (E89) 35isvsMercedes-Benz SLK (R171) · Facelift 2008 AMG SLK 55 V8

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

New comparison

BMW Z4 (E89)

35is

340 hp2979 ccGasolineRWDAutomaticTurbochargedRoadster2010-2013
VS

Mercedes-Benz SLK (R171) · Facelift 2008

AMG SLK 55 V8

360 hp5439 ccGasolineRWDAutomaticNaturally aspiratedRoadster2008-2011

Comparison overview

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

Best choices

BMW Z4 (E89) 35is

  • Quickest 0-100 km/h
    4.8 s
  • Fastest top speed
    270 km/h
    168 mph Unrestricted
    250 km/h
    155 mph Restricted
  • Lowest combined fuel consumption
    9.0 L/100 km
    26.1 mpg US
    31.4 mpg UK
  • Lowest city consumption
    12.6 L/100 km
    18.7 mpg US
    22.4 mpg UK
  • Lowest highway consumption
    6.9 L/100 km
    34.1 mpg US
    40.9 mpg UK
  • Best estimated range
    611 km
    380 mi
  • Best overall score
    59/100
  • Best economy score
    83/100
  • Best practicality score
    32/100

Specification comparison

Specification comparison
ModelBMWZ4 (E89)35isMercedes-BenzSLK (R171)Facelift 2008AMG SLK 55 V8
Power
340hp254kW
360hp268kW
Torque
450Nm332lb-ft
510Nm376lb-ft
Curb weight
1,600kg3,527lb
1,500kg3,307lb
Gross weight
1,855kg4,090lb
1,850kg4,079lb
Top speed
Unrestricted
270 km/h168 mph
Restricted
250 km/h155 mph
Calculated
Unrestricted
270 km/h168 mph
Restricted
250 km/h155 mph
Calculated
To 99% top speed
63.8s99% target: 267 km/h / 166 mph
Calculated
61.9s99% target: 267 km/h / 166 mph
Calculated
0-100 km/h
4.8s
4.9s
0-200 km/h
16.0s
Calculated
16.0s
Calculated
0-60 mph
4.6s
Calculated
4.7s
Calculated
Fuel consumption
9L/100 km26.1mpg US31.4mpg UK
12L/100 km19.6mpg US23.5mpg UK
Fuel consumption city
12.6L/100 km18.7mpg US22.4mpg UK
17.7L/100 km13.3mpg US16.0mpg UK
Fuel consumption highway
6.9L/100 km34.1mpg US40.9mpg UK
8.8L/100 km26.7mpg US32.1mpg UK
Quarter mile
12.9s
Calculated
12.9s
Calculated
Power-to-weight
213hp/t158kW/t96hp/1000 lb
Calculated
240hp/t179kW/t109hp/1000 lb
Calculated
Torque-to-weight
281Nm/t188lb-ft/ton
Calculated
340Nm/t227lb-ft/ton
Calculated
Estimated range
611km380mi
Calculated
583km362mi
Calculated
Displacement
2,979cc182cu in
5,439cc332cu in
Length
4,244mm167in
4,103mm162in
Width
1,790mm70in
1,788mm70in
Height
1,284mm51in
1,271mm50in
Wheelbase
2,496mm98in
2,430mm96in
Front track
1,511mm59in
1,524mm60in
Rear track
1,537mm61in
1,549mm61in
Trunk volume-
208L
Doors
2
2
Seats
2
2
Fuel tank
55L
70L
CO2 emissions
210g/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.

BMW Z4 (E89) 35isMercedes-Benz SLK (R171) Facelift 2008 AMG SLK 55 V8PowerTorque
  • BMW Z4 (E89) 35is: Power / Torque
  • Mercedes-Benz SLK (R171) Facelift 2008 AMG SLK 55 V8: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
BMWZ4 (E89)35is5,900 rpm1,500-4,500 rpm6,150 rpm
Mercedes-BenzSLK (R171)Facelift 2008AMG SLK 55 V85,750 rpm4,000 rpm6,000 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricBMWZ4 (E89)35isMercedes-BenzSLK (R171)Facelift 2008AMG SLK 55 V8
Acceleration checkpoints
0-60 mph
0-97 km/h
4.6 s
4.7 s
0-100 km/h
0-62 mph
4.8 s
4.9 s
0-200 km/h
0-124 mph
16.0 s
16.0 s
Top speed
Unrestricted
270 km/h168 mph
Restricted
250 km/h155 mph
Likely limited
Unrestricted
270 km/h168 mph
Restricted
250 km/h155 mph
Limited
Drag race simulation
60 ft
18 m
2.2 s
2.2 s
330 ft
101 m
5.6 s
5.7 s
1/8 mile
201 m
8.4 s
8.5 s
1000 ft
305 m
10.9 s
10.9 s
1/4 mile
402 m
12.9 s
12.9 s
Trap speed
1/4 mile
402 m
181 km/h
113 mph
181 km/h
113 mph

Power comparison

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

Chart data table
VehicleValue
BMWZ4 (E89)35is
340 hp
254 kW
Mercedes-BenzSLK (R171)Facelift 2008AMG SLK 55 V8
360 hp
268 kW

Mercedes-Benz SLK (R171) Facelift 2008 AMG SLK 55 V8 has 20 hp more than BMW Z4 (E89) 35is.

The biggest power difference is between BMW Z4 (E89) 35is and Mercedes-Benz SLK (R171) Facelift 2008 AMG SLK 55 V8: 20 hp (15 kW).

Torque comparison

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

Chart data table
VehicleValue
BMWZ4 (E89)35is
450 Nm
332 lb-ft
Mercedes-BenzSLK (R171)Facelift 2008AMG SLK 55 V8
510 Nm
376 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
BMWZ4 (E89)35is
1,600 kg
3,527 lb
Mercedes-BenzSLK (R171)Facelift 2008AMG SLK 55 V8
1,500 kg
3,307 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 (E89)35is
Unrestricted
270 km/h168 mph
Restricted
250 km/h155 mph
Mercedes-BenzSLK (R171)Facelift 2008AMG SLK 55 V8
Unrestricted
270 km/h168 mph
Restricted
250 km/h155 mph

0-100 km/h comparison

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

Chart data table
VehicleValue
BMWZ4 (E89)35is4.8 s
Mercedes-BenzSLK (R171)Facelift 2008AMG SLK 55 V84.9 s

Although Mercedes-Benz SLK (R171) Facelift 2008 AMG SLK 55 V8 has more power, BMW Z4 (E89) 35is is quicker from 0-100 km/h.

The biggest 0-100 km/h difference is between BMW Z4 (E89) 35is and Mercedes-Benz SLK (R171) Facelift 2008 AMG SLK 55 V8: 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
BMWZ4 (E89)35is
9.0 L/100 km
26.1 mpg US
31.4 mpg UK
Mercedes-BenzSLK (R171)Facelift 2008AMG SLK 55 V8
12.0 L/100 km
19.6 mpg US
23.5 mpg UK

The biggest fuel consumption difference is between BMW Z4 (E89) 35is and Mercedes-Benz SLK (R171) Facelift 2008 AMG SLK 55 V8: 3.0 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 (E89)35is
213 hp/t
158 kW/t
4.7 kg/hp
Mercedes-BenzSLK (R171)Facelift 2008AMG SLK 55 V8
240 hp/t
179 kW/t
4.2 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
BMWZ4 (E89)35is
611 km
380 mi
Mercedes-BenzSLK (R171)Facelift 2008AMG SLK 55 V8
583 km
362 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
BMWZ4 (E89)35is
340 hp
254 kW
4.8 s
Unrestricted
270 km/h168 mph
Restricted
250 km/h155 mph
Mercedes-BenzSLK (R171)Facelift 2008AMG SLK 55 V8
360 hp
268 kW
4.9 s
Unrestricted
270 km/h168 mph
Restricted
250 km/h155 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 (E89)35is
Power
340 hp
254 kW
0-100 km/h4.8 s
Top speed
Unrestricted
270 km/h168 mph
Restricted
250 km/h155 mph
Doors/seats
2 doors
2 seats
Trunk-
Length
4,244 mm
167.1 in
Height
1,284 mm
50.6 in
Mercedes-BenzSLK (R171)Facelift 2008AMG SLK 55 V8
Power
360 hp
268 kW
0-100 km/h4.9 s
Top speed
Unrestricted
270 km/h168 mph
Restricted
250 km/h155 mph
Doors/seats
2 doors
2 seats
Trunk
208 L
7.3 cu ft
Length
4,103 mm
161.5 in
Height
1,271 mm
50.0 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 (E89)35is
Power
340 hp
254 kW
0-100 km/h4.8 s
Top speed
Unrestricted
270 km/h168 mph
Restricted
250 km/h155 mph
9.0 L/100 km
26.1 mpg US
31.4 mpg UK
Mercedes-BenzSLK (R171)Facelift 2008AMG SLK 55 V8
Power
360 hp
268 kW
0-100 km/h4.9 s
Top speed
Unrestricted
270 km/h168 mph
Restricted
250 km/h155 mph
12.0 L/100 km
19.6 mpg US
23.5 mpg UK

BMW Z4 (E89) 35is 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 (E89)35is
9.0 L/100 km
26.1 mpg US
31.4 mpg UK
4.8 s
Mercedes-BenzSLK (R171)Facelift 2008AMG SLK 55 V8
12.0 L/100 km
19.6 mpg US
23.5 mpg UK
4.9 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 (E89)35is
213 hp/t
158 kW/t
4.7 kg/hp
9.0 L/100 km
26.1 mpg US
31.4 mpg UK
Mercedes-BenzSLK (R171)Facelift 2008AMG SLK 55 V8
240 hp/t
179 kW/t
4.2 kg/hp
12.0 L/100 km
19.6 mpg US
23.5 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleBMWZ4 (E89)35isMercedes-BenzSLK (R171)Facelift 2008AMG SLK 55 V8
Power
340 hp
254 kW
360 hp
268 kW
Torque
450 Nm
332 lb-ft
510 Nm
376 lb-ft
Acceleration
4.8 s
4.9 s
Top speed
Unrestricted
270 km/h168 mph
Restricted
250 km/h155 mph
Unrestricted
270 km/h168 mph
Restricted
250 km/h155 mph
Lightness
1,600 kg
3,527 lb
1,500 kg
3,307 lb
Fuel consumption
9.0 L/100 km
26.1 mpg US
31.4 mpg UK
12.0 L/100 km
19.6 mpg US
23.5 mpg UK
Practicality
Doors/seats
2 doors
2 seats
Trunk-
Length
4,244 mm
167.1 in
Height
1,284 mm
50.6 in
Doors/seats
2 doors
2 seats
Trunk
208 L
7.3 cu ft
Length
4,103 mm
161.5 in
Height
1,271 mm
50.0 in
Range score
611 km
380 mi
583 km
362 mi
CO2 score
210 g/km
-
Trunk score
-
208 L
7.3 cu ft
Power-to-weight score
213 hp/t
158 kW/t
4.7 kg/hp
240 hp/t
179 kW/t
4.2 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
VehicleBMW Z4 (E89) 35isMercedes-Benz SLK (R171) Facelift 2008 AMG SLK 55 V8
Consumption9 L/100 km26.1 mpg US31.4 mpg UK12 L/100 km19.6 mpg US23.5 mpg UK
Cost / 100 km15.75 LC100 km21.00 LC100 km
Cost / 100 mi25.35 LC100 mi33.80 LC100 mi
Annual fuel used1,350 L357 US gal297 UK gal1,800 L476 US gal396 UK gal
Annual fuel cost2,363 LC/year3,150 LC/year

Head-to-head comparisons

BMW Z4 (E89) 35is

  • Is 0.1 s quicker from 0-100 km/h
  • Uses 3.0 L/100 km less fuel
  • Has 28 km (17 mi) more estimated range

Pros

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

Cons

  • Lowest power
  • Heaviest

Choose cars to compare

Brand
Model
Generation
Engine or modification
BMW Z4 (E89) 35is
Mercedes-Benz SLK (R171) AMG SLK 55 V8
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2 vehicles selected

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