Car comparison

Porsche 911 Cabriolet (997) · Facelift 2008 Turbo 3.8vsJaguar XK Convertible (X150) · Facelift 2009 R 5.0 V8

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

New comparison

Porsche 911 Cabriolet (997) · Facelift 2008

Turbo 3.8

500 hp3800 ccGasolineAWDDual-clutchTurbochargedCabriolet / convertible2009-2011
VS

Jaguar XK Convertible (X150) · Facelift 2009

R 5.0 V8

510 hp5000 ccGasolineRWDAutomaticSuperchargedCabriolet / convertible2009-2011

Comparison overview

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

Best choices

Porsche 911 Cabriolet (997) Facelift 2008 Turbo 3.8

  • Quickest 0-100 km/h
    3.7 s
  • Fastest top speed
    312 km/h
    194 mph
  • Highest torque
    650 Nm
    479 lb-ft
  • Lightest
    1,670 kg
    3,682 lb
  • Best power-to-weight
    299 hp/t
    223 kW/t
    3.3 kg/hp
  • Lowest combined fuel consumption
    11.5 L/100 km
    20.5 mpg US
    24.6 mpg UK
  • Lowest city consumption
    16.7 L/100 km
    14.1 mpg US
    16.9 mpg UK
  • Lowest highway consumption
    8.2 L/100 km
    28.7 mpg US
    34.4 mpg UK
  • Best estimated range
    583 km
    362 mi
  • Best overall score
    76/100
  • Best performance score
    90/100
  • Best economy score
    76/100
  • Best practicality score
    47/100

Specification comparison

Specification comparison
ModelPorsche911 Cabriolet (997)Facelift 2008Turbo 3.8JaguarXK Convertible (X150)Facelift 2009R 5.0 V8
Power
500hp373kW
510hp380kW
Torque
650Nm479lb-ft
625Nm461lb-ft
Curb weight
1,670kg3,682lb
1,800kg3,968lb
Gross weight
2,020kg4,453lb
2,185kg4,817lb
Top speed
312 km/h
194 mph
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Calculated
To 99% top speed
54.9s99% target: 309 km/h / 192 mph
Calculated
57.8s99% target: 257 km/h / 160 mph
Calculated
0-100 km/h
3.7s
4.8s
0-200 km/h
10.7s
Calculated
16.3s
Calculated
0-60 mph
3.5s
Calculated
4.6s
Calculated
Fuel consumption
11.5L/100 km20.5mpg US24.6mpg UK
12.3L/100 km19.1mpg US23.0mpg UK
Fuel consumption city
16.7L/100 km14.1mpg US16.9mpg UK
18.9L/100 km12.4mpg US14.9mpg UK
Fuel consumption highway
8.2L/100 km28.7mpg US34.4mpg UK
8.6L/100 km27.4mpg US32.8mpg UK
Quarter mile
11.4s
Calculated
12.9s
Calculated
Power-to-weight
299hp/t223kW/t136hp/1000 lb
Calculated
283hp/t211kW/t129hp/1000 lb
Calculated
Torque-to-weight
389Nm/t260lb-ft/ton
Calculated
347Nm/t232lb-ft/ton
Calculated
Estimated range
583km362mi
Calculated
574km357mi
Calculated
Displacement
3,800cc232cu in
5,000cc305cu in
Length
4,450mm175in
4,794mm189in
Width
1,852mm73in
-
Height
1,300mm51in
1,329mm52in
Wheelbase
2,350mm93in
2,752mm108in
Ground clearance-
100mm4in
Trunk volume-
200L
Max trunk volume
105L
313L
Doors
2
2
Seats
4
4
Fuel tank
67L
71L
CO2 emissions
270g/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.

Porsche 911 Cabriolet (997) Facelift 2008 Turbo 3.8Jaguar XK Convertible (X150) Facelift 2009 R 5.0 V8PowerTorque
  • Porsche 911 Cabriolet (997) Facelift 2008 Turbo 3.8: Power / Torque
  • Jaguar XK Convertible (X150) Facelift 2009 R 5.0 V8: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
Porsche911 Cabriolet (997)Facelift 2008Turbo 3.86,000-6,500 rpm1,950-5,000 rpm6,750 rpm
JaguarXK Convertible (X150)Facelift 2009R 5.0 V86,000-6,500 rpm2,500-5,500 rpm6,750 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricPorsche911 Cabriolet (997)Facelift 2008Turbo 3.8JaguarXK Convertible (X150)Facelift 2009R 5.0 V8
Acceleration checkpoints
0-60 mph
0-97 km/h
3.5 s
4.6 s
0-100 km/h
0-62 mph
3.7 s
4.8 s
0-200 km/h
0-124 mph
10.7 s
16.3 s
Top speed
312 km/h
194 mph
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Limited
Drag race simulation
60 ft
18 m
2.0 s
2.2 s
330 ft
101 m
5.1 s
5.7 s
1/8 mile
201 m
7.6 s
8.5 s
1000 ft
305 m
9.7 s
10.9 s
1/4 mile
402 m
11.4 s
12.9 s
Trap speed
1/4 mile
402 m
207 km/h
129 mph
181 km/h
112 mph

Power comparison

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

Chart data table
VehicleValue
Porsche911 Cabriolet (997)Facelift 2008Turbo 3.8
500 hp
373 kW
JaguarXK Convertible (X150)Facelift 2009R 5.0 V8
510 hp
380 kW

Jaguar XK Convertible (X150) Facelift 2009 R 5.0 V8 has 10 hp more than Porsche 911 Cabriolet (997) Facelift 2008 Turbo 3.8.

The biggest power difference is between Porsche 911 Cabriolet (997) Facelift 2008 Turbo 3.8 and Jaguar XK Convertible (X150) Facelift 2009 R 5.0 V8: 10 hp (7 kW).

Torque comparison

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

Chart data table
VehicleValue
Porsche911 Cabriolet (997)Facelift 2008Turbo 3.8
650 Nm
479 lb-ft
JaguarXK Convertible (X150)Facelift 2009R 5.0 V8
625 Nm
461 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
Porsche911 Cabriolet (997)Facelift 2008Turbo 3.8
1,670 kg
3,682 lb
JaguarXK Convertible (X150)Facelift 2009R 5.0 V8
1,800 kg
3,968 lb

Top speed without limiter comparison

Bar comparison chart for Top speed without limiter. Higher is better · km/h / mph

Chart data table
VehicleValue
Porsche911 Cabriolet (997)Facelift 2008Turbo 3.8
312 km/h
194 mph
JaguarXK Convertible (X150)Facelift 2009R 5.0 V8
Unrestricted
260 km/h162 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
Porsche911 Cabriolet (997)Facelift 2008Turbo 3.83.7 s
JaguarXK Convertible (X150)Facelift 2009R 5.0 V84.8 s

Although Jaguar XK Convertible (X150) Facelift 2009 R 5.0 V8 has more power, Porsche 911 Cabriolet (997) Facelift 2008 Turbo 3.8 is quicker from 0-100 km/h.

The biggest 0-100 km/h difference is between Porsche 911 Cabriolet (997) Facelift 2008 Turbo 3.8 and Jaguar XK Convertible (X150) Facelift 2009 R 5.0 V8: 1.1 s.

Fuel consumption comparison

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

Chart data table
VehicleValue
Porsche911 Cabriolet (997)Facelift 2008Turbo 3.8
11.5 L/100 km
20.5 mpg US
24.6 mpg UK
JaguarXK Convertible (X150)Facelift 2009R 5.0 V8
12.3 L/100 km
19.1 mpg US
23.0 mpg UK

The biggest fuel consumption difference is between Porsche 911 Cabriolet (997) Facelift 2008 Turbo 3.8 and Jaguar XK Convertible (X150) Facelift 2009 R 5.0 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
VehicleValue
Porsche911 Cabriolet (997)Facelift 2008Turbo 3.8
299 hp/t
223 kW/t
3.3 kg/hp
JaguarXK Convertible (X150)Facelift 2009R 5.0 V8
283 hp/t
211 kW/t
3.5 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
Porsche911 Cabriolet (997)Facelift 2008Turbo 3.8
583 km
362 mi
JaguarXK Convertible (X150)Facelift 2009R 5.0 V8
574 km
357 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
Porsche911 Cabriolet (997)Facelift 2008Turbo 3.8
500 hp
373 kW
3.7 s
312 km/h
194 mph
JaguarXK Convertible (X150)Facelift 2009R 5.0 V8
510 hp
380 kW
4.8 s
Unrestricted
260 km/h162 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
Porsche911 Cabriolet (997)Facelift 2008Turbo 3.8
Power
500 hp
373 kW
0-100 km/h3.7 s
Top speed
312 km/h
194 mph
Doors/seats
2 doors
4 seats
Trunk
105 L
3.7 cu ft
Length
4,450 mm
175.2 in
Height
1,300 mm
51.2 in
JaguarXK Convertible (X150)Facelift 2009R 5.0 V8
Power
510 hp
380 kW
0-100 km/h4.8 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Doors/seats
2 doors
4 seats
Trunk
200 L
7.1 cu ft
Length
4,794 mm
188.7 in
Height
1,329 mm
52.3 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
Porsche911 Cabriolet (997)Facelift 2008Turbo 3.8
Power
500 hp
373 kW
0-100 km/h3.7 s
Top speed
312 km/h
194 mph
11.5 L/100 km
20.5 mpg US
24.6 mpg UK
JaguarXK Convertible (X150)Facelift 2009R 5.0 V8
Power
510 hp
380 kW
0-100 km/h4.8 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
12.3 L/100 km
19.1 mpg US
23.0 mpg UK

Porsche 911 Cabriolet (997) Facelift 2008 Turbo 3.8 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
Porsche911 Cabriolet (997)Facelift 2008Turbo 3.8
11.5 L/100 km
20.5 mpg US
24.6 mpg UK
3.7 s
JaguarXK Convertible (X150)Facelift 2009R 5.0 V8
12.3 L/100 km
19.1 mpg US
23.0 mpg UK
4.8 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
Porsche911 Cabriolet (997)Facelift 2008Turbo 3.8
299 hp/t
223 kW/t
3.3 kg/hp
11.5 L/100 km
20.5 mpg US
24.6 mpg UK
JaguarXK Convertible (X150)Facelift 2009R 5.0 V8
283 hp/t
211 kW/t
3.5 kg/hp
12.3 L/100 km
19.1 mpg US
23.0 mpg UK

Detailed score breakdown

Detailed score breakdown
VehiclePorsche911 Cabriolet (997)Facelift 2008Turbo 3.8JaguarXK Convertible (X150)Facelift 2009R 5.0 V8
Power
500 hp
373 kW
510 hp
380 kW
Torque
650 Nm
479 lb-ft
625 Nm
461 lb-ft
Acceleration
3.7 s
4.8 s
Top speed
312 km/h
194 mph
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Lightness
1,670 kg
3,682 lb
1,800 kg
3,968 lb
Fuel consumption
11.5 L/100 km
20.5 mpg US
24.6 mpg UK
12.3 L/100 km
19.1 mpg US
23.0 mpg UK
Practicality
Doors/seats
2 doors
4 seats
Trunk
105 L
3.7 cu ft
Length
4,450 mm
175.2 in
Height
1,300 mm
51.2 in
Doors/seats
2 doors
4 seats
Trunk
200 L
7.1 cu ft
Length
4,794 mm
188.7 in
Height
1,329 mm
52.3 in
Range score
583 km
362 mi
574 km
357 mi
CO2 score
270 g/km
-
Trunk score
105 L
3.7 cu ft
200 L
7.1 cu ft
Power-to-weight score
299 hp/t
223 kW/t
3.3 kg/hp
283 hp/t
211 kW/t
3.5 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
VehiclePorsche 911 Cabriolet (997) Facelift 2008 Turbo 3.8Jaguar XK Convertible (X150) Facelift 2009 R 5.0 V8
Consumption11.5 L/100 km20.5 mpg US24.6 mpg UK12.3 L/100 km19.1 mpg US23 mpg UK
Cost / 100 km20.13 LC100 km21.53 LC100 km
Cost / 100 mi32.39 LC100 mi34.64 LC100 mi
Annual fuel used1,725 L456 US gal379 UK gal1,845 L487 US gal406 UK gal
Annual fuel cost3,019 LC/year3,229 LC/year

Head-to-head comparisons

Porsche 911 Cabriolet (997) Facelift 2008 Turbo 3.8

  • Has 25 Nm more
  • Is 130 kg lighter
  • Is 1.1 s quicker from 0-100 km/h
  • Has 52 km/h (32 mph) higher top speed
  • Uses 0.8 L/100 km less fuel
  • Has 16 hp/t better power-to-weight
  • Has 9 km (5 mi) more estimated range

Pros

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

Cons

  • Lowest power
  • Smallest trunk

Choose cars to compare

Brand
Model
Generation
Engine or modification
Porsche 911 Cabriolet (997) Turbo 3.8
Jaguar XK Convertible (X150) R 5.0 V8
Compare selected cars
2 vehicles selected

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