Car comparison

Aston Martin V8 Vantage Roadster · Facelift 2008 4.7 V8vsMercedes-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

Aston Martin V8 Vantage Roadster · Facelift 2008

4.7 V8

426 hp4735 ccGasolineRWDAutomaticNaturally aspiratedRoadster2008-2016

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.

Mercedes-Benz SLK (R171) Facelift 2008 AMG SLK 55 V8

Highest torque
510 Nm
376 lb-ft
Lightest
1,500 kg
3,307 lb
Lowest combined fuel consumption
12.0 L/100 km
19.6 mpg US
23.5 mpg UK
Lowest city consumption
17.7 L/100 km
13.3 mpg US
16.0 mpg UK
Lowest highway consumption
8.8 L/100 km
26.7 mpg US
32.1 mpg UK
Largest trunk
208 L
Best economy score
75/100
Best practicality score
28/100

Aston Martin V8 Vantage Roadster Facelift 2008 4.7 V8

Quickest 0-100 km/h
4.9 s
Fastest top speed
300 km/h
186 mph Unrestricted
290 km/h
180 mph Restricted
Most powerful
426 hp
318 kW
Best power-to-weight
249 hp/t
186 kW/t
4.0 kg/hp
Best estimated range
625 km
388 mi
Best overall score
61/100
Best performance score
78/100

Specification comparison

Specification comparison
Model	Aston MartinV8 Vantage RoadsterFacelift 20084.7 V8	Mercedes-BenzSLK (R171)Facelift 2008AMG SLK 55 V8
Power	426hp318kW	360hp268kW
Torque	470Nm347lb-ft	510Nm376lb-ft
Curb weight	1,710kg3,770lb	1,500kg3,307lb
Gross weight	-	1,850kg4,079lb
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	61.9s99% target: 267 km/h / 166 mph Calculated
0-100 km/h	4.9s	4.9s
0-200 km/h	14.9s Calculated	16.0s Calculated
0-60 mph	4.7s Calculated	4.7s Calculated
Fuel consumption	12.8L/100 km18.4mpg US22.1mpg UK	12L/100 km19.6mpg US23.5mpg UK
Fuel consumption city	19L/100 km12.4mpg US14.9mpg UK	17.7L/100 km13.3mpg US16.0mpg UK
Fuel consumption highway	9.2L/100 km25.6mpg US30.7mpg UK	8.8L/100 km26.7mpg US32.1mpg UK
Quarter mile	12.9s Calculated	12.9s Calculated
Power-to-weight	249hp/t186kW/t113hp/1000 lb Calculated	240hp/t179kW/t109hp/1000 lb Calculated
Torque-to-weight	275Nm/t184lb-ft/ton Calculated	340Nm/t227lb-ft/ton Calculated
Estimated range	625km388mi Calculated	583km362mi Calculated
Displacement	4,735cc289cu in	5,439cc332cu in
Length	4,385mm173in	4,103mm162in
Width	1,865mm73in	1,788mm70in
Height	1,270mm50in	1,271mm50in
Wheelbase	2,600mm102in	2,430mm96in
Front track	1,570mm62in	1,524mm60in
Rear track	1,590mm63in	1,549mm61in
Trunk volume	144L	208L
Doors	2	2
Seats	2	2
Fuel tank	80L	70L
CO2 emissions	296g/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 (R171) Facelift 2008 AMG SLK 55 V8PowerTorque

Dyno simulation data table
Vehicle	Peak power RPM	Peak torque RPM	Max engine speed
Aston MartinV8 Vantage RoadsterFacelift 20084.7 V8	7,300 rpm	5,000 rpm	7,550 rpm
Mercedes-BenzSLK (R171)Facelift 2008AMG SLK 55 V8	5,750 rpm	4,000 rpm	6,000 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
Metric	Aston MartinV8 Vantage RoadsterFacelift 20084.7 V8	Mercedes-BenzSLK (R171)Facelift 2008AMG SLK 55 V8
	Acceleration checkpoints
0-60 mph 0-97 km/h	4.7 s	4.7 s
0-100 km/h 0-62 mph	4.9 s	4.9 s
0-200 km/h 0-124 mph	14.9 s	16.0 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	5.7 s
1/8 mile 201 m	8.5 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	185 km/h 115 mph	181 km/h 113 mph

Power comparison

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

Chart data table
Vehicle	Value
Aston MartinV8 Vantage RoadsterFacelift 20084.7 V8	426 hp 318 kW
Mercedes-BenzSLK (R171)Facelift 2008AMG SLK 55 V8	360 hp 268 kW

Aston Martin V8 Vantage Roadster Facelift 2008 4.7 V8 has 66 hp more than Mercedes-Benz SLK (R171) Facelift 2008 AMG SLK 55 V8.

The biggest power difference is between Mercedes-Benz SLK (R171) Facelift 2008 AMG SLK 55 V8 and Aston Martin V8 Vantage Roadster Facelift 2008 4.7 V8: 66 hp (49 kW).

Torque comparison

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

Chart data table
Vehicle	Value
Aston MartinV8 Vantage RoadsterFacelift 20084.7 V8	470 Nm 347 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
Vehicle	Value
Aston MartinV8 Vantage RoadsterFacelift 20084.7 V8	1,710 kg 3,770 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
Vehicle	Value
Aston MartinV8 Vantage RoadsterFacelift 20084.7 V8	Unrestricted 300 km/h186 mph Restricted 290 km/h180 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
Vehicle	Value
Aston MartinV8 Vantage RoadsterFacelift 20084.7 V8	4.9 s
Mercedes-BenzSLK (R171)Facelift 2008AMG SLK 55 V8	4.9 s

Fuel consumption comparison

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

Chart data table
Vehicle	Value
Aston MartinV8 Vantage RoadsterFacelift 20084.7 V8	12.8 L/100 km 18.4 mpg US 22.1 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 Mercedes-Benz SLK (R171) Facelift 2008 AMG SLK 55 V8 and Aston Martin V8 Vantage Roadster Facelift 2008 4.7 V8: 0.8 L/100 km.

Power-to-weight comparison

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

Chart data table
Vehicle	Value
Aston MartinV8 Vantage RoadsterFacelift 20084.7 V8	249 hp/t 186 kW/t 4.0 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
Vehicle	Value
Aston MartinV8 Vantage RoadsterFacelift 20084.7 V8	625 km 388 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
Vehicle	Power	Acceleration	Top 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 (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.

Vehicle

Performance score

Practicality score

Aston MartinV8 Vantage RoadsterFacelift 20084.7 V8

Power	426 hp 318 kW
0-100 km/h	4.9 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 (R171)Facelift 2008AMG SLK 55 V8

Power	360 hp 268 kW
0-100 km/h	4.9 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.

Vehicle

Performance score

Fuel economy score

Aston MartinV8 Vantage RoadsterFacelift 20084.7 V8

Power	426 hp 318 kW
0-100 km/h	4.9 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 (R171)Facelift 2008AMG SLK 55 V8

Power	360 hp 268 kW
0-100 km/h	4.9 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

Aston Martin V8 Vantage Roadster Facelift 2008 4.7 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
Vehicle	Fuel consumption, L/100 km	0-100 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 (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
Vehicle	Power-to-weight, hp/t	Fuel 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 (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

Vehicle

Aston MartinV8 Vantage RoadsterFacelift 20084.7 V8

Mercedes-BenzSLK (R171)Facelift 2008AMG SLK 55 V8

Power

426 hp

318 kW

360 hp

268 kW

Torque

470 Nm

347 lb-ft

510 Nm

376 lb-ft

Acceleration

4.9 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

1,500 kg

3,307 lb

Fuel consumption

12.8 L/100 km

18.4 mpg US

22.1 mpg UK

12.0 L/100 km

19.6 mpg US

23.5 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	208 L 7.3 cu ft
Length	4,103 mm 161.5 in
Height	1,271 mm 50.0 in

Range score

625 km

388 mi

583 km

362 mi

CO2 score

296 g/km

Trunk score

144 L

5.1 cu ft

208 L

7.3 cu ft

Power-to-weight score

249 hp/t

186 kW/t

4.0 kg/hp

240 hp/t

179 kW/t

4.2 kg/hp

Overall

Fixed score

Fuel cost and annual usage

Estimate running costs from combined consumption, your annual distance, and the fuel price in your local currency.

Average annual distanceDistance unitFuel price in your local currencyPrice unit

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
Vehicle	Aston Martin V8 Vantage Roadster Facelift 2008 4.7 V8	Mercedes-Benz SLK (R171) Facelift 2008 AMG SLK 55 V8
Consumption	12.8 L/100 km18.4 mpg US22.1 mpg UK	12 L/100 km19.6 mpg US23.5 mpg UK
Cost / 100 km	22.40 LC100 km	21.00 LC100 km
Cost / 100 mi	36.05 LC100 mi	33.80 LC100 mi
Annual fuel used	1,920 L507 US gal422 UK gal	1,800 L476 US gal396 UK gal
Annual fuel cost	3,360 LC/year	3,150 LC/year