Car comparison

Mercedes-Benz SL (R231) · Facelift 2016 SL 400 V6vsMercedes-Benz SLK (R172) SLK 250d

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

New comparison

Mercedes-Benz SL (R231) · Facelift 2016

SL 400 V6

367 hp2996 ccGasolineRWDAutomaticTwin-turboRoadster2016-2018
VS

Mercedes-Benz SLK (R172)

SLK 250d

204 hp2143 ccDieselRWDAutomaticTwin-turboRoadster2015-2016

Comparison overview

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

Best choices

Mercedes-Benz SL (R231) Facelift 2016 SL 400 V6

  • Quickest 0-100 km/h
    4.9 s
  • Fastest top speed
    270 km/h
    168 mph Unrestricted
    250 km/h
    155 mph Restricted
  • Most powerful
    367 hp
    274 kW
  • Highest torque
    500 Nm
    369 lb-ft
  • Best power-to-weight
    221 hp/t
    165 kW/t
    4.5 kg/hp
  • Largest trunk
    345 L
  • Best overall score
    61/100
  • Best performance score
    73/100
  • Best practicality score
    34/100

Mercedes-Benz SLK (R172) SLK 250d

  • Lightest
    1,530 kg
    3,373 lb
  • 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 economy score
    94/100

Specification comparison

Specification comparison
ModelMercedes-BenzSL (R231)Facelift 2016SL 400 V6Mercedes-BenzSLK (R172)SLK 250d
Power
367hp274kW
204hp152kW
Torque
500Nm369lb-ft
500Nm369lb-ft
Curb weight
1,660kg3,660lb
1,530kg3,373lb
Gross weight
2,115kg4,663lb
1,905kg4,200lb
Top speed
Unrestricted
270 km/h168 mph
Restricted
250 km/h155 mph
Calculated
245 km/h
152 mph
To 99% top speed
65.6s99% target: 267 km/h / 166 mph
Calculated
81.7s99% target: 243 km/h / 151 mph
Calculated
0-100 km/h
4.9s
6.6s
0-200 km/h
16.4s
Calculated
25.7s
Calculated
0-60 mph
4.7s
Calculated
6.3s
Calculated
Fuel consumption
7.7L/100 km30.5mpg US36.7mpg UK
4.7L/100 km50mpg US60.1mpg UK
Fuel consumption city
10.5L/100 km22.4mpg US26.9mpg UK
5.5L/100 km42.8mpg US51.4mpg UK
Fuel consumption highway
6L/100 km39.2mpg US47.1mpg UK
4.2L/100 km56mpg US67.3mpg UK
Quarter mile
13.0s
Calculated
14.6s
Calculated
Power-to-weight
221hp/t165kW/t100hp/1000 lb
Calculated
133hp/t99kW/t60hp/1000 lb
Calculated
Torque-to-weight
301Nm/t202lb-ft/ton
Calculated
327Nm/t219lb-ft/ton
Calculated
Estimated range
844km525mi
Calculated
1,277km793mi
Calculated
Displacement
2,996cc183cu in
2,143cc131cu in
Length
4,631mm182in
4,134mm163in
Width
1,877mm74in
1,810mm71in
Height
1,315mm52in
1,301mm51in
Wheelbase
2,585mm102in
2,430mm96in
Front track
1,600mm63in
1,559mm61in
Rear track
1,604mm63in
1,565mm62in
Trunk volume
345L
225L
Max trunk volume
485L
335L
Doors
2
2
Seats
2
2
Fuel tank
65L
60L
CO2 emissions
175g/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 SL (R231) Facelift 2016 SL 400 V6Mercedes-Benz SLK (R172) SLK 250dPowerTorque
  • Mercedes-Benz SL (R231) Facelift 2016 SL 400 V6: Power / Torque
  • Mercedes-Benz SLK (R172) SLK 250d: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
Mercedes-BenzSL (R231)Facelift 2016SL 400 V65,500-6,000 rpm2,000-4,200 rpm6,250 rpm
Mercedes-BenzSLK (R172)SLK 250d3,800 rpm1,600-1,800 rpm4,050 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricMercedes-BenzSL (R231)Facelift 2016SL 400 V6Mercedes-BenzSLK (R172)SLK 250d
Acceleration checkpoints
0-60 mph
0-97 km/h
4.7 s
6.3 s
0-100 km/h
0-62 mph
4.9 s
6.6 s
0-200 km/h
0-124 mph
16.4 s
25.7 s
Top speed
Unrestricted
270 km/h168 mph
Restricted
250 km/h155 mph
Likely limited
245 km/h
152 mph
Drag race simulation
60 ft
18 m
2.2 s
2.4 s
330 ft
101 m
5.7 s
6.4 s
1/8 mile
201 m
8.5 s
9.6 s
1000 ft
305 m
10.9 s
12.3 s
1/4 mile
402 m
13.0 s
14.6 s
Trap speed
1/4 mile
402 m
180 km/h
112 mph
159 km/h
99 mph

Power comparison

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

Chart data table
VehicleValue
Mercedes-BenzSL (R231)Facelift 2016SL 400 V6
367 hp
274 kW
Mercedes-BenzSLK (R172)SLK 250d
204 hp
152 kW

Mercedes-Benz SL (R231) Facelift 2016 SL 400 V6 has 163 hp more than Mercedes-Benz SLK (R172) SLK 250d.

The biggest power difference is between Mercedes-Benz SLK (R172) SLK 250d and Mercedes-Benz SL (R231) Facelift 2016 SL 400 V6: 163 hp (122 kW).

Torque comparison

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

Chart data table
VehicleValue
Mercedes-BenzSL (R231)Facelift 2016SL 400 V6
500 Nm
369 lb-ft
Mercedes-BenzSLK (R172)SLK 250d
500 Nm
369 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
Mercedes-BenzSL (R231)Facelift 2016SL 400 V6
1,660 kg
3,660 lb
Mercedes-BenzSLK (R172)SLK 250d
1,530 kg
3,373 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-BenzSL (R231)Facelift 2016SL 400 V6
Unrestricted
270 km/h168 mph
Restricted
250 km/h155 mph
Mercedes-BenzSLK (R172)SLK 250d
245 km/h
152 mph

0-100 km/h comparison

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

Chart data table
VehicleValue
Mercedes-BenzSL (R231)Facelift 2016SL 400 V64.9 s
Mercedes-BenzSLK (R172)SLK 250d6.6 s

The biggest 0-100 km/h difference is between Mercedes-Benz SL (R231) Facelift 2016 SL 400 V6 and Mercedes-Benz SLK (R172) SLK 250d: 1.7 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-BenzSL (R231)Facelift 2016SL 400 V6
7.7 L/100 km
30.5 mpg US
36.7 mpg UK
Mercedes-BenzSLK (R172)SLK 250d
4.7 L/100 km
50.0 mpg US
60.1 mpg UK

The biggest fuel consumption difference is between Mercedes-Benz SLK (R172) SLK 250d and Mercedes-Benz SL (R231) Facelift 2016 SL 400 V6: 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
Mercedes-BenzSL (R231)Facelift 2016SL 400 V6
221 hp/t
165 kW/t
4.5 kg/hp
Mercedes-BenzSLK (R172)SLK 250d
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
Mercedes-BenzSL (R231)Facelift 2016SL 400 V6
844 km
525 mi
Mercedes-BenzSLK (R172)SLK 250d
1,277 km
793 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
Mercedes-BenzSL (R231)Facelift 2016SL 400 V6
367 hp
274 kW
4.9 s
Unrestricted
270 km/h168 mph
Restricted
250 km/h155 mph
Mercedes-BenzSLK (R172)SLK 250d
204 hp
152 kW
6.6 s
245 km/h
152 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-BenzSL (R231)Facelift 2016SL 400 V6
Power
367 hp
274 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
345 L
12.2 cu ft
Length
4,631 mm
182.3 in
Height
1,315 mm
51.8 in
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

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-BenzSL (R231)Facelift 2016SL 400 V6
Power
367 hp
274 kW
0-100 km/h4.9 s
Top speed
Unrestricted
270 km/h168 mph
Restricted
250 km/h155 mph
7.7 L/100 km
30.5 mpg US
36.7 mpg UK
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

Mercedes-Benz SL (R231) Facelift 2016 SL 400 V6 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-BenzSL (R231)Facelift 2016SL 400 V6
7.7 L/100 km
30.5 mpg US
36.7 mpg UK
4.9 s
Mercedes-BenzSLK (R172)SLK 250d
4.7 L/100 km
50.0 mpg US
60.1 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-BenzSL (R231)Facelift 2016SL 400 V6
221 hp/t
165 kW/t
4.5 kg/hp
7.7 L/100 km
30.5 mpg US
36.7 mpg UK
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

Detailed score breakdown

Detailed score breakdown
VehicleMercedes-BenzSL (R231)Facelift 2016SL 400 V6Mercedes-BenzSLK (R172)SLK 250d
Power
367 hp
274 kW
204 hp
152 kW
Torque
500 Nm
369 lb-ft
500 Nm
369 lb-ft
Acceleration
4.9 s
6.6 s
Top speed
Unrestricted
270 km/h168 mph
Restricted
250 km/h155 mph
245 km/h
152 mph
Lightness
1,660 kg
3,660 lb
1,530 kg
3,373 lb
Fuel consumption
7.7 L/100 km
30.5 mpg US
36.7 mpg UK
4.7 L/100 km
50.0 mpg US
60.1 mpg UK
Practicality
Doors/seats
2 doors
2 seats
Trunk
345 L
12.2 cu ft
Length
4,631 mm
182.3 in
Height
1,315 mm
51.8 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
844 km
525 mi
1,277 km
793 mi
CO2 score
175 g/km
-
Trunk score
345 L
12.2 cu ft
225 L
7.9 cu ft
Power-to-weight score
221 hp/t
165 kW/t
4.5 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
VehicleMercedes-Benz SL (R231) Facelift 2016 SL 400 V6Mercedes-Benz SLK (R172) SLK 250d
Consumption7.7 L/100 km30.5 mpg US36.7 mpg UK4.7 L/100 km50 mpg US60.1 mpg UK
Cost / 100 km13.48 LC100 km8.23 LC100 km
Cost / 100 mi21.69 LC100 mi13.24 LC100 mi
Annual fuel used1,155 L305 US gal254 UK gal705 L186 US gal155 UK gal
Annual fuel cost2,021 LC/year1,234 LC/year

Head-to-head comparisons

Mercedes-Benz SL (R231) Facelift 2016 SL 400 V6

  • Has 163 hp more
  • Is 1.7 s quicker from 0-100 km/h
  • Has 25 km/h (16 mph) higher top speed
  • Has 88 hp/t better power-to-weight
  • Has 120 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 250d

  • Is 130 kg lighter
  • Uses 3.0 L/100 km less fuel
  • Has 432 km (269 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
Mercedes-Benz SL (R231) SL 400 V6
Mercedes-Benz SLK (R172) SLK 250d
Compare selected cars
2 vehicles selected

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