Car comparison

Mercedes-Benz SL (R230) · Facelift 2008 AMG SL 63 V8vsMercedes-Benz SLK (R172) AMG SLK 55 V8

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

New comparison

Mercedes-Benz SL (R230) · Facelift 2008

AMG SL 63 V8

525 hp6208 ccGasolineRWDAutomaticNaturally aspiratedRoadster2008-2011
VS

Mercedes-Benz SLK (R172)

AMG SLK 55 V8

421 hp5461 ccGasolineRWDAutomaticNaturally aspiratedRoadster2012-2015

Comparison overview

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

Best choices

Mercedes-Benz SL (R230) Facelift 2008 AMG SL 63 V8

  • Quickest 0-100 km/h
    4.6 s
  • Fastest top speed
    270 km/h
    168 mph Unrestricted
    250 km/h
    155 mph Restricted
  • Most powerful
    525 hp
    391 kW
  • Highest torque
    630 Nm
    465 lb-ft
  • Best power-to-weight
    277 hp/t
    207 kW/t
    3.6 kg/hp
  • Largest trunk
    235 L
  • Best overall score
    65/100
  • Best performance score
    82/100
  • Best practicality score
    30/100

Mercedes-Benz SLK (R172) AMG SLK 55 V8

  • Lightest
    1,535 kg
    3,384 lb
  • Lowest combined fuel consumption
    8.4 L/100 km
    28.0 mpg US
    33.6 mpg UK
  • Lowest city consumption
    12.0 L/100 km
    19.6 mpg US
    23.5 mpg UK
  • Lowest highway consumption
    6.2 L/100 km
    37.9 mpg US
    45.6 mpg UK
  • Best estimated range
    833 km
    518 mi
  • Best economy score
    84/100

Specification comparison

Specification comparison
ModelMercedes-BenzSL (R230)Facelift 2008AMG SL 63 V8Mercedes-BenzSLK (R172)AMG SLK 55 V8
Power
525hp391kW
421hp314kW
Torque
630Nm465lb-ft
540Nm398lb-ft
Curb weight
1,895kg4,178lb
1,535kg3,384lb
Gross weight
2,225kg4,905lb
1,910kg4,211lb
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
58.0s99% target: 267 km/h / 166 mph
Calculated
58.1s99% target: 267 km/h / 166 mph
Calculated
0-100 km/h
4.6s
4.6s
0-200 km/h
15.0s
Calculated
15.0s
Calculated
0-60 mph
4.4s
Calculated
4.4s
Calculated
Fuel consumption
14.1L/100 km16.7mpg US20.0mpg UK
8.4L/100 km28mpg US33.6mpg UK
Fuel consumption city
21.7L/100 km10.8mpg US13.0mpg UK
12L/100 km19.6mpg US23.5mpg UK
Fuel consumption highway
9.7L/100 km24.2mpg US29.1mpg UK
6.2L/100 km37.9mpg US45.6mpg UK
Quarter mile
12.6s
Calculated
12.6s
Calculated
Power-to-weight
277hp/t207kW/t126hp/1000 lb
Calculated
274hp/t205kW/t124hp/1000 lb
Calculated
Torque-to-weight
332Nm/t222lb-ft/ton
Calculated
352Nm/t235lb-ft/ton
Calculated
Estimated range
567km353mi
Calculated
833km518mi
Calculated
Displacement
6,208cc379cu in
5,461cc333cu in
Length
4,562mm180in
4,134mm163in
Width
1,820mm72in
1,810mm71in
Height
1,317mm52in
1,301mm51in
Wheelbase
2,560mm101in
2,430mm96in
Front track
1,559mm61in
1,559mm61in
Rear track
1,547mm61in
1,565mm62in
Trunk volume
235L
225L
Max trunk volume
339L
335L
Doors
2
2
Seats
2
2
Fuel tank
80L
70L
CO2 emissions-
195g/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 (R230) Facelift 2008 AMG SL 63 V8Mercedes-Benz SLK (R172) AMG SLK 55 V8PowerTorque
  • Mercedes-Benz SL (R230) Facelift 2008 AMG SL 63 V8: Power / Torque
  • Mercedes-Benz SLK (R172) AMG SLK 55 V8: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
Mercedes-BenzSL (R230)Facelift 2008AMG SL 63 V86,800 rpm5,200 rpm7,050 rpm
Mercedes-BenzSLK (R172)AMG SLK 55 V86,800 rpm4,500 rpm7,050 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricMercedes-BenzSL (R230)Facelift 2008AMG SL 63 V8Mercedes-BenzSLK (R172)AMG SLK 55 V8
Acceleration checkpoints
0-60 mph
0-97 km/h
4.4 s
4.4 s
0-100 km/h
0-62 mph
4.6 s
4.6 s
0-200 km/h
0-124 mph
15.0 s
15.0 s
Top speed
Unrestricted
270 km/h168 mph
Restricted
250 km/h155 mph
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
5.6 s
1/8 mile
201 m
8.3 s
8.3 s
1000 ft
305 m
10.7 s
10.7 s
1/4 mile
402 m
12.6 s
12.6 s
Trap speed
1/4 mile
402 m
185 km/h
115 mph
185 km/h
115 mph

Power comparison

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

Chart data table
VehicleValue
Mercedes-BenzSL (R230)Facelift 2008AMG SL 63 V8
525 hp
391 kW
Mercedes-BenzSLK (R172)AMG SLK 55 V8
421 hp
314 kW

Mercedes-Benz SL (R230) Facelift 2008 AMG SL 63 V8 has 104 hp more than Mercedes-Benz SLK (R172) AMG SLK 55 V8.

The biggest power difference is between Mercedes-Benz SLK (R172) AMG SLK 55 V8 and Mercedes-Benz SL (R230) Facelift 2008 AMG SL 63 V8: 104 hp (78 kW).

Torque comparison

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

Chart data table
VehicleValue
Mercedes-BenzSL (R230)Facelift 2008AMG SL 63 V8
630 Nm
465 lb-ft
Mercedes-BenzSLK (R172)AMG SLK 55 V8
540 Nm
398 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
Mercedes-BenzSL (R230)Facelift 2008AMG SL 63 V8
1,895 kg
4,178 lb
Mercedes-BenzSLK (R172)AMG SLK 55 V8
1,535 kg
3,384 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 (R230)Facelift 2008AMG SL 63 V8
Unrestricted
270 km/h168 mph
Restricted
250 km/h155 mph
Mercedes-BenzSLK (R172)AMG 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
Mercedes-BenzSL (R230)Facelift 2008AMG SL 63 V84.6 s
Mercedes-BenzSLK (R172)AMG SLK 55 V84.6 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-BenzSL (R230)Facelift 2008AMG SL 63 V8
14.1 L/100 km
16.7 mpg US
20.0 mpg UK
Mercedes-BenzSLK (R172)AMG SLK 55 V8
8.4 L/100 km
28.0 mpg US
33.6 mpg UK

The biggest fuel consumption difference is between Mercedes-Benz SLK (R172) AMG SLK 55 V8 and Mercedes-Benz SL (R230) Facelift 2008 AMG SL 63 V8: 5.7 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 (R230)Facelift 2008AMG SL 63 V8
277 hp/t
207 kW/t
3.6 kg/hp
Mercedes-BenzSLK (R172)AMG SLK 55 V8
274 hp/t
205 kW/t
3.6 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
Mercedes-BenzSL (R230)Facelift 2008AMG SL 63 V8
567 km
353 mi
Mercedes-BenzSLK (R172)AMG SLK 55 V8
833 km
518 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
Mercedes-BenzSL (R230)Facelift 2008AMG SL 63 V8
525 hp
391 kW
4.6 s
Unrestricted
270 km/h168 mph
Restricted
250 km/h155 mph
Mercedes-BenzSLK (R172)AMG SLK 55 V8
421 hp
314 kW
4.6 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
Mercedes-BenzSL (R230)Facelift 2008AMG SL 63 V8
Power
525 hp
391 kW
0-100 km/h4.6 s
Top speed
Unrestricted
270 km/h168 mph
Restricted
250 km/h155 mph
Doors/seats
2 doors
2 seats
Trunk
235 L
8.3 cu ft
Length
4,562 mm
179.6 in
Height
1,317 mm
51.9 in
Mercedes-BenzSLK (R172)AMG SLK 55 V8
Power
421 hp
314 kW
0-100 km/h4.6 s
Top speed
Unrestricted
270 km/h168 mph
Restricted
250 km/h155 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 (R230)Facelift 2008AMG SL 63 V8
Power
525 hp
391 kW
0-100 km/h4.6 s
Top speed
Unrestricted
270 km/h168 mph
Restricted
250 km/h155 mph
14.1 L/100 km
16.7 mpg US
20.0 mpg UK
Mercedes-BenzSLK (R172)AMG SLK 55 V8
Power
421 hp
314 kW
0-100 km/h4.6 s
Top speed
Unrestricted
270 km/h168 mph
Restricted
250 km/h155 mph
8.4 L/100 km
28.0 mpg US
33.6 mpg UK

Mercedes-Benz SLK (R172) AMG SLK 55 V8 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 (R230)Facelift 2008AMG SL 63 V8
14.1 L/100 km
16.7 mpg US
20.0 mpg UK
4.6 s
Mercedes-BenzSLK (R172)AMG SLK 55 V8
8.4 L/100 km
28.0 mpg US
33.6 mpg UK
4.6 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 (R230)Facelift 2008AMG SL 63 V8
277 hp/t
207 kW/t
3.6 kg/hp
14.1 L/100 km
16.7 mpg US
20.0 mpg UK
Mercedes-BenzSLK (R172)AMG SLK 55 V8
274 hp/t
205 kW/t
3.6 kg/hp
8.4 L/100 km
28.0 mpg US
33.6 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleMercedes-BenzSL (R230)Facelift 2008AMG SL 63 V8Mercedes-BenzSLK (R172)AMG SLK 55 V8
Power
525 hp
391 kW
421 hp
314 kW
Torque
630 Nm
465 lb-ft
540 Nm
398 lb-ft
Acceleration
4.6 s
4.6 s
Top speed
Unrestricted
270 km/h168 mph
Restricted
250 km/h155 mph
Unrestricted
270 km/h168 mph
Restricted
250 km/h155 mph
Lightness
1,895 kg
4,178 lb
1,535 kg
3,384 lb
Fuel consumption
14.1 L/100 km
16.7 mpg US
20.0 mpg UK
8.4 L/100 km
28.0 mpg US
33.6 mpg UK
Practicality
Doors/seats
2 doors
2 seats
Trunk
235 L
8.3 cu ft
Length
4,562 mm
179.6 in
Height
1,317 mm
51.9 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
567 km
353 mi
833 km
518 mi
CO2 score
-
195 g/km
Trunk score
235 L
8.3 cu ft
225 L
7.9 cu ft
Power-to-weight score
277 hp/t
207 kW/t
3.6 kg/hp
274 hp/t
205 kW/t
3.6 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 (R230) Facelift 2008 AMG SL 63 V8Mercedes-Benz SLK (R172) AMG SLK 55 V8
Consumption14.1 L/100 km16.7 mpg US20 mpg UK8.4 L/100 km28 mpg US33.6 mpg UK
Cost / 100 km24.68 LC100 km14.70 LC100 km
Cost / 100 mi39.71 LC100 mi23.66 LC100 mi
Annual fuel used2,115 L559 US gal465 UK gal1,260 L333 US gal277 UK gal
Annual fuel cost3,701 LC/year2,205 LC/year

Head-to-head comparisons

Mercedes-Benz SL (R230) Facelift 2008 AMG SL 63 V8

  • Has 104 hp more
  • Has 90 Nm more
  • Has 3 hp/t better power-to-weight
  • Has 10 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) AMG SLK 55 V8

  • Is 360 kg lighter
  • Uses 5.7 L/100 km less fuel
  • Has 266 km (165 mi) more estimated range

Pros

  • Lightest
  • Lowest combined fuel consumption
  • Best estimated range

Cons

  • Lowest power
  • Smallest trunk

Choose cars to compare

Brand
Model
Generation
Engine or modification
Mercedes-Benz SL (R230) AMG SL 63 V8
Mercedes-Benz SLK (R172) AMG SLK 55 V8
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Mercedes-Benz SL (R230) · Facelift 2008 AMG SL 63 V8 vs Mercedes-Benz SLK (R172) AMG SLK 55 V8 - car comparison - FastVsFaster