Car comparison

Aston Martin V8 Vantage Roadster · Facelift 2008 4.7 V8vsMercedes-Benz SLK (R172) AMG SLK 55 V8

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

New comparison

Aston Martin V8 Vantage Roadster · Facelift 2008

4.7 V8

426 hp4735 ccGasolineRWDAutomaticNaturally aspiratedRoadster2008-2016
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 SLK (R172) AMG SLK 55 V8

  • Quickest 0-100 km/h
    4.6 s
  • Highest torque
    540 Nm
    398 lb-ft
  • Lightest
    1,535 kg
    3,384 lb
  • Best power-to-weight
    274 hp/t
    205 kW/t
    3.6 kg/hp
  • 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
  • Lowest CO2 emissions
    195 g/km
  • Best estimated range
    833 km
    518 mi
  • Largest trunk
    225 L
  • Best overall score
    62/100
  • Best economy score
    84/100
  • Best practicality score
    29/100

Specification comparison

Specification comparison
ModelAston MartinV8 Vantage RoadsterFacelift 20084.7 V8Mercedes-BenzSLK (R172)AMG SLK 55 V8
Power
426hp318kW
421hp314kW
Torque
470Nm347lb-ft
540Nm398lb-ft
Curb weight
1,710kg3,770lb
1,535kg3,384lb
Gross weight-
1,910kg4,211lb
Top speed
Unrestricted
300 km/h186 mph
Restricted
290 km/h180 mph
Calculated
Unrestricted
270 km/h168 mph
Restricted
250 km/h155 mph
Calculated
To 99% top speed
74.0s99% target: 297 km/h / 185 mph
Calculated
58.1s99% target: 267 km/h / 166 mph
Calculated
0-100 km/h
4.9s
4.6s
0-200 km/h
14.9s
Calculated
15.0s
Calculated
0-60 mph
4.7s
Calculated
4.4s
Calculated
Fuel consumption
12.8L/100 km18.4mpg US22.1mpg UK
8.4L/100 km28mpg US33.6mpg UK
Fuel consumption city
19L/100 km12.4mpg US14.9mpg UK
12L/100 km19.6mpg US23.5mpg UK
Fuel consumption highway
9.2L/100 km25.6mpg US30.7mpg UK
6.2L/100 km37.9mpg US45.6mpg UK
Quarter mile
12.9s
Calculated
12.6s
Calculated
Power-to-weight
249hp/t186kW/t113hp/1000 lb
Calculated
274hp/t205kW/t124hp/1000 lb
Calculated
Torque-to-weight
275Nm/t184lb-ft/ton
Calculated
352Nm/t235lb-ft/ton
Calculated
Estimated range
625km388mi
Calculated
833km518mi
Calculated
Displacement
4,735cc289cu in
5,461cc333cu in
Length
4,385mm173in
4,134mm163in
Width
1,865mm73in
1,810mm71in
Height
1,270mm50in
1,301mm51in
Wheelbase
2,600mm102in
2,430mm96in
Front track
1,570mm62in
1,559mm61in
Rear track
1,590mm63in
1,565mm62in
Trunk volume
144L
225L
Max trunk volume-
335L
Doors
2
2
Seats
2
2
Fuel tank
80L
70L
CO2 emissions
296g/km
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.

Aston Martin V8 Vantage Roadster Facelift 2008 4.7 V8Mercedes-Benz SLK (R172) AMG SLK 55 V8PowerTorque
  • Aston Martin V8 Vantage Roadster Facelift 2008 4.7 V8: Power / Torque
  • Mercedes-Benz SLK (R172) AMG SLK 55 V8: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
Aston MartinV8 Vantage RoadsterFacelift 20084.7 V87,300 rpm5,000 rpm7,550 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
MetricAston MartinV8 Vantage RoadsterFacelift 20084.7 V8Mercedes-BenzSLK (R172)AMG SLK 55 V8
Acceleration checkpoints
0-60 mph
0-97 km/h
4.7 s
4.4 s
0-100 km/h
0-62 mph
4.9 s
4.6 s
0-200 km/h
0-124 mph
14.9 s
15.0 s
Top speed
Unrestricted
300 km/h186 mph
Restricted
290 km/h180 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
5.7 s
5.6 s
1/8 mile
201 m
8.5 s
8.3 s
1000 ft
305 m
10.9 s
10.7 s
1/4 mile
402 m
12.9 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
Aston MartinV8 Vantage RoadsterFacelift 20084.7 V8
426 hp
318 kW
Mercedes-BenzSLK (R172)AMG SLK 55 V8
421 hp
314 kW

Aston Martin V8 Vantage Roadster Facelift 2008 4.7 V8 has 5 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 Aston Martin V8 Vantage Roadster Facelift 2008 4.7 V8: 5 hp (4 kW).

Torque comparison

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

Chart data table
VehicleValue
Aston MartinV8 Vantage RoadsterFacelift 20084.7 V8
470 Nm
347 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
Aston MartinV8 Vantage RoadsterFacelift 20084.7 V8
1,710 kg
3,770 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
Aston MartinV8 Vantage RoadsterFacelift 20084.7 V8
Unrestricted
300 km/h186 mph
Restricted
290 km/h180 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
Aston MartinV8 Vantage RoadsterFacelift 20084.7 V84.9 s
Mercedes-BenzSLK (R172)AMG SLK 55 V84.6 s

Although Aston Martin V8 Vantage Roadster Facelift 2008 4.7 V8 has more power, Mercedes-Benz SLK (R172) AMG SLK 55 V8 is quicker from 0-100 km/h.

The biggest 0-100 km/h difference is between Mercedes-Benz SLK (R172) AMG SLK 55 V8 and Aston Martin V8 Vantage Roadster Facelift 2008 4.7 V8: 0.3 s.

Fuel consumption comparison

Bar comparison chart for Fuel consumption. Lower is better · L/100 km / mpg US / mpg UK

Chart data table
VehicleValue
Aston MartinV8 Vantage RoadsterFacelift 20084.7 V8
12.8 L/100 km
18.4 mpg US
22.1 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 Aston Martin V8 Vantage Roadster Facelift 2008 4.7 V8: 4.4 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
Aston MartinV8 Vantage RoadsterFacelift 20084.7 V8
249 hp/t
186 kW/t
4.0 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
Aston MartinV8 Vantage RoadsterFacelift 20084.7 V8
625 km
388 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
Aston MartinV8 Vantage RoadsterFacelift 20084.7 V8
426 hp
318 kW
4.9 s
Unrestricted
300 km/h186 mph
Restricted
290 km/h180 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
Aston MartinV8 Vantage RoadsterFacelift 20084.7 V8
Power
426 hp
318 kW
0-100 km/h4.9 s
Top speed
Unrestricted
300 km/h186 mph
Restricted
290 km/h180 mph
Doors/seats
2 doors
2 seats
Trunk
144 L
5.1 cu ft
Length
4,385 mm
172.6 in
Height
1,270 mm
50.0 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
Aston MartinV8 Vantage RoadsterFacelift 20084.7 V8
Power
426 hp
318 kW
0-100 km/h4.9 s
Top speed
Unrestricted
300 km/h186 mph
Restricted
290 km/h180 mph
12.8 L/100 km
18.4 mpg US
22.1 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
Aston MartinV8 Vantage RoadsterFacelift 20084.7 V8
12.8 L/100 km
18.4 mpg US
22.1 mpg UK
4.9 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
Aston MartinV8 Vantage RoadsterFacelift 20084.7 V8
249 hp/t
186 kW/t
4.0 kg/hp
12.8 L/100 km
18.4 mpg US
22.1 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
VehicleAston MartinV8 Vantage RoadsterFacelift 20084.7 V8Mercedes-BenzSLK (R172)AMG SLK 55 V8
Power
426 hp
318 kW
421 hp
314 kW
Torque
470 Nm
347 lb-ft
540 Nm
398 lb-ft
Acceleration
4.9 s
4.6 s
Top speed
Unrestricted
300 km/h186 mph
Restricted
290 km/h180 mph
Unrestricted
270 km/h168 mph
Restricted
250 km/h155 mph
Lightness
1,710 kg
3,770 lb
1,535 kg
3,384 lb
Fuel consumption
12.8 L/100 km
18.4 mpg US
22.1 mpg UK
8.4 L/100 km
28.0 mpg US
33.6 mpg UK
Practicality
Doors/seats
2 doors
2 seats
Trunk
144 L
5.1 cu ft
Length
4,385 mm
172.6 in
Height
1,270 mm
50.0 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
625 km
388 mi
833 km
518 mi
CO2 score
296 g/km
195 g/km
Trunk score
144 L
5.1 cu ft
225 L
7.9 cu ft
Power-to-weight score
249 hp/t
186 kW/t
4.0 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
VehicleAston Martin V8 Vantage Roadster Facelift 2008 4.7 V8Mercedes-Benz SLK (R172) AMG SLK 55 V8
Consumption12.8 L/100 km18.4 mpg US22.1 mpg UK8.4 L/100 km28 mpg US33.6 mpg UK
Cost / 100 km22.40 LC100 km14.70 LC100 km
Cost / 100 mi36.05 LC100 mi23.66 LC100 mi
Annual fuel used1,920 L507 US gal422 UK gal1,260 L333 US gal277 UK gal
Annual fuel cost3,360 LC/year2,205 LC/year

Head-to-head comparisons

Mercedes-Benz SLK (R172) AMG SLK 55 V8

  • Has 70 Nm more
  • Is 175 kg lighter
  • Is 0.3 s quicker from 0-100 km/h
  • Uses 4.4 L/100 km less fuel
  • Has 25 hp/t better power-to-weight
  • Has 208 km (129 mi) more estimated range
  • Has 81 L more trunk volume
  • Emits 101 g/km less CO2

Pros

  • Quickest 0-100 km/h in this comparison
  • Highest torque
  • Lightest
  • Lowest combined fuel consumption
  • Best power-to-weight ratio
  • Best estimated range
  • Largest trunk

Cons

  • Lowest power
  • Lowest top speed

Choose cars to compare

Brand
Model
Generation
Engine or modification
Aston Martin V8 Vantage Roadster 4.7 V8
Mercedes-Benz SLK (R172) AMG SLK 55 V8
Compare selected cars
2 vehicles selected

Popular comparisons

4.7 V8
4.7 V8
VS
Aston MartinV8 Vantage RoadsterFacelift 20084.7 V8vsAston MartinV8 VantageFacelift 20084.7 V8
AMG SLK 55 V8
AMG SLK 55 V8
VS
Mercedes-BenzSLK (R172)AMG SLK 55 V8vsMercedes-BenzSLK (R171)Facelift 2008AMG SLK 55 V8
4.7 V8
4.0 V8
VS
Aston MartinV8 Vantage RoadsterFacelift 20084.7 V8vsAston MartinV8 Vantage Roadster4.0 V8
AMG SLK 55 V8
AMG SLK 55 V8
VS
Mercedes-BenzSLK (R172)AMG SLK 55 V8vsMercedes-BenzSLK (R171)AMG SLK 55 V8
4.7 V8
4.3 i V8 32V
VS
Aston MartinV8 Vantage RoadsterFacelift 20084.7 V8vsAston MartinV8 Vantage4.3 i V8 32V
AMG SLK 55 V8
AMG SLK 32 V6
VS
Mercedes-BenzSLK (R172)AMG SLK 55 V8vsMercedes-BenzSLK (R170)Facelift 2000AMG SLK 32 V6
4.7 V8
4.0 V8
VS
Aston MartinV8 Vantage RoadsterFacelift 20084.7 V8vsAston MartinV8 Vantage RoadsterFacelift 20244.0 V8
AMG SLK 55 V8
SLK 230 Kompressor
VS
Mercedes-BenzSLK (R172)AMG SLK 55 V8vsMercedes-BenzSLK (R170)SLK 230 Kompressor
4.7 V8
5.3 i V8 32V
VS
Aston MartinV8 Vantage RoadsterFacelift 20084.7 V8vsAston MartinV8 Vantage (II)5.3 i V8 32V
AMG SLK 55 V8
SL 500 V8
VS
Mercedes-BenzSLK (R172)AMG SLK 55 V8vsMercedes-BenzSL (R231)Facelift 2016SL 500 V8
4.7 V8
4.0 V8
VS
Aston MartinV8 Vantage RoadsterFacelift 20084.7 V8vsAston MartinV8 VantageFacelift 20244.0 V8
AMG SLK 55 V8
AMG SL 63
VS
Mercedes-BenzSLK (R172)AMG SLK 55 V8vsMercedes-BenzSL (R231)AMG SL 63
Aston Martin V8 Vantage Roadster · Facelift 2008 4.7 V8 vs Mercedes-Benz SLK (R172) AMG SLK 55 V8 - car comparison - FastVsFaster