Car comparison

Jaguar XJ (X351) 5.0 V8vsInfiniti FX II 50 V8

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

New comparison

Jaguar XJ (X351)

5.0 V8

385 hp5000 ccGasolineRWDAutomaticNaturally aspiratedSedan2009-2012
VS

Infiniti FX II

50 V8

390 hp5026 ccGasolineAWDAutomaticNaturally aspiratedCrossover2008-2012

Comparison overview

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

Best choices

Jaguar XJ (X351) 5.0 V8

  • Quickest 0-100 km/h
    5.7 s
  • Fastest top speed
    265 km/h
    165 mph Unrestricted
    250 km/h
    155 mph Restricted
  • Highest torque
    515 Nm
    380 lb-ft
  • Lightest
    1,755 kg
    3,869 lb
  • Best power-to-weight
    219 hp/t
    164 kW/t
    4.6 kg/hp
  • Lowest combined fuel consumption
    11.3 L/100 km
    20.8 mpg US
    25.0 mpg UK
  • Lowest city consumption
    17.0 L/100 km
    13.8 mpg US
    16.6 mpg UK
  • Lowest highway consumption
    8.2 L/100 km
    28.7 mpg US
    34.4 mpg UK
  • Best estimated range
    726 km
    451 mi
  • Best performance score
    71/100
  • Best economy score
    77/100

Infiniti FX II 50 V8

  • Most powerful
    390 hp
    291 kW
  • Largest trunk
    702 L
  • Best overall score
    75/100
  • Best practicality score
    91/100

Specification comparison

Specification comparison
ModelJaguarXJ (X351)5.0 V8InfinitiFX II50 V8
Power
385hp287kW
390hp291kW
Torque
515Nm380lb-ft
500Nm369lb-ft
Curb weight
1,755kg3,869lb
2,075kg4,575lb
Gross weight
2,300kg5,071lb
2,615kg5,765lb
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Calculated
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Calculated
To 99% top speed
58.2s99% target: 262 km/h / 163 mph
Calculated
92.5s99% target: 257 km/h / 160 mph
Calculated
0-100 km/h
5.7s
5.8s
0-200 km/h
17.3s
Calculated
22.6s
Calculated
0-60 mph
5.5s
Calculated
5.5s
Calculated
Fuel consumption
11.3L/100 km20.8mpg US25.0mpg UK
13.1L/100 km18mpg US21.6mpg UK
Fuel consumption city
17L/100 km13.8mpg US16.6mpg UK
18.9L/100 km12.4mpg US14.9mpg UK
Fuel consumption highway
8.2L/100 km28.7mpg US34.4mpg UK
9.8L/100 km24mpg US28.8mpg UK
Quarter mile
13.6s
Calculated
14.0s
Calculated
Power-to-weight
219hp/t164kW/t100hp/1000 lb
Calculated
188hp/t140kW/t85hp/1000 lb
Calculated
Torque-to-weight
293Nm/t196lb-ft/ton
Calculated
241Nm/t161lb-ft/ton
Calculated
Estimated range
726km451mi
Calculated
687km427mi
Calculated
Displacement
5,000cc305cu in
5,026cc307cu in
Length
5,127mm202in
4,860mm191in
Width
1,894mm75in
1,925mm76in
Height
1,457mm57in
1,680mm66in
Wheelbase
3,032mm119in
2,885mm114in
Front track
1,626mm64in
1,635mm64in
Rear track
1,604mm63in
1,640mm65in
Ground clearance-
187mm7in
Trunk volume
520L
702L
Max trunk volume-
1,756L
Doors
4
5
Seats
5
5
Fuel tank
82L
90L

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.

Jaguar XJ (X351) 5.0 V8Infiniti FX II 50 V8PowerTorque
  • Jaguar XJ (X351) 5.0 V8: Power / Torque
  • Infiniti FX II 50 V8: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
JaguarXJ (X351)5.0 V86,500 rpm6,500 rpm6,750 rpm
InfinitiFX II50 V86,500 rpm4,400 rpm6,800 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricJaguarXJ (X351)5.0 V8InfinitiFX II50 V8
Acceleration checkpoints
0-60 mph
0-97 km/h
5.5 s
5.5 s
0-100 km/h
0-62 mph
5.7 s
5.8 s
0-200 km/h
0-124 mph
17.3 s
22.6 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Limited
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Limited
Drag race simulation
60 ft
18 m
2.5 s
2.2 s
330 ft
101 m
6.2 s
6.0 s
1/8 mile
201 m
9.1 s
9.1 s
1000 ft
305 m
11.6 s
11.7 s
1/4 mile
402 m
13.6 s
14.0 s
Trap speed
1/4 mile
402 m
178 km/h
111 mph
164 km/h
102 mph

Power comparison

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

Chart data table
VehicleValue
JaguarXJ (X351)5.0 V8
385 hp
287 kW
InfinitiFX II50 V8
390 hp
291 kW

Infiniti FX II 50 V8 has 5 hp more than Jaguar XJ (X351) 5.0 V8.

The biggest power difference is between Jaguar XJ (X351) 5.0 V8 and Infiniti FX II 50 V8: 5 hp (4 kW).

Torque comparison

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

Chart data table
VehicleValue
JaguarXJ (X351)5.0 V8
515 Nm
380 lb-ft
InfinitiFX II50 V8
500 Nm
369 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
JaguarXJ (X351)5.0 V8
1,755 kg
3,869 lb
InfinitiFX II50 V8
2,075 kg
4,575 lb

Top speed without limiter comparison

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

Chart data table
VehicleValue
JaguarXJ (X351)5.0 V8
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
InfinitiFX II50 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
JaguarXJ (X351)5.0 V85.7 s
InfinitiFX II50 V85.8 s

Although Infiniti FX II 50 V8 has more power, Jaguar XJ (X351) 5.0 V8 is quicker from 0-100 km/h.

The biggest 0-100 km/h difference is between Jaguar XJ (X351) 5.0 V8 and Infiniti FX II 50 V8: 0.1 s.

Fuel consumption comparison

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

Chart data table
VehicleValue
JaguarXJ (X351)5.0 V8
11.3 L/100 km
20.8 mpg US
25.0 mpg UK
InfinitiFX II50 V8
13.1 L/100 km
18.0 mpg US
21.6 mpg UK

The biggest fuel consumption difference is between Jaguar XJ (X351) 5.0 V8 and Infiniti FX II 50 V8: 1.8 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
JaguarXJ (X351)5.0 V8
219 hp/t
164 kW/t
4.6 kg/hp
InfinitiFX II50 V8
188 hp/t
140 kW/t
5.3 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
JaguarXJ (X351)5.0 V8
726 km
451 mi
InfinitiFX II50 V8
687 km
427 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
JaguarXJ (X351)5.0 V8
385 hp
287 kW
5.7 s
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
InfinitiFX II50 V8
390 hp
291 kW
5.8 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
JaguarXJ (X351)5.0 V8
Power
385 hp
287 kW
0-100 km/h5.7 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Doors/seats
4 doors
5 seats
Trunk
520 L
18.4 cu ft
Length
5,127 mm
201.9 in
Height
1,457 mm
57.4 in
InfinitiFX II50 V8
Power
390 hp
291 kW
0-100 km/h5.8 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Doors/seats
5 doors
5 seats
Trunk
702 L
24.8 cu ft
Length
4,860 mm
191.3 in
Height
1,680 mm
66.1 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
JaguarXJ (X351)5.0 V8
Power
385 hp
287 kW
0-100 km/h5.7 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
11.3 L/100 km
20.8 mpg US
25.0 mpg UK
InfinitiFX II50 V8
Power
390 hp
291 kW
0-100 km/h5.8 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
13.1 L/100 km
18.0 mpg US
21.6 mpg UK

Jaguar XJ (X351) 5.0 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
JaguarXJ (X351)5.0 V8
11.3 L/100 km
20.8 mpg US
25.0 mpg UK
5.7 s
InfinitiFX II50 V8
13.1 L/100 km
18.0 mpg US
21.6 mpg UK
5.8 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
JaguarXJ (X351)5.0 V8
219 hp/t
164 kW/t
4.6 kg/hp
11.3 L/100 km
20.8 mpg US
25.0 mpg UK
InfinitiFX II50 V8
188 hp/t
140 kW/t
5.3 kg/hp
13.1 L/100 km
18.0 mpg US
21.6 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleJaguarXJ (X351)5.0 V8InfinitiFX II50 V8
Power
385 hp
287 kW
390 hp
291 kW
Torque
515 Nm
380 lb-ft
500 Nm
369 lb-ft
Acceleration
5.7 s
5.8 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Lightness
1,755 kg
3,869 lb
2,075 kg
4,575 lb
Fuel consumption
11.3 L/100 km
20.8 mpg US
25.0 mpg UK
13.1 L/100 km
18.0 mpg US
21.6 mpg UK
Practicality
Doors/seats
4 doors
5 seats
Trunk
520 L
18.4 cu ft
Length
5,127 mm
201.9 in
Height
1,457 mm
57.4 in
Doors/seats
5 doors
5 seats
Trunk
702 L
24.8 cu ft
Length
4,860 mm
191.3 in
Height
1,680 mm
66.1 in
Range score
726 km
451 mi
687 km
427 mi
Trunk score
520 L
18.4 cu ft
702 L
24.8 cu ft
Power-to-weight score
219 hp/t
164 kW/t
4.6 kg/hp
188 hp/t
140 kW/t
5.3 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
VehicleJaguar XJ (X351) 5.0 V8Infiniti FX II 50 V8
Consumption11.3 L/100 km20.8 mpg US25 mpg UK13.1 L/100 km18 mpg US21.6 mpg UK
Cost / 100 km19.78 LC100 km22.93 LC100 km
Cost / 100 mi31.82 LC100 mi36.89 LC100 mi
Annual fuel used1,695 L448 US gal373 UK gal1,965 L519 US gal432 UK gal
Annual fuel cost2,966 LC/year3,439 LC/year

Head-to-head comparisons

Jaguar XJ (X351) 5.0 V8

  • Has 15 Nm more
  • Is 320 kg lighter
  • Is 0.1 s quicker from 0-100 km/h
  • Has 5 km/h (3 mph) higher top speed
  • Uses 1.8 L/100 km less fuel
  • Has 31 hp/t better power-to-weight
  • Has 39 km (24 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

Infiniti FX II 50 V8

  • Has 5 hp more
  • Has 182 L more trunk volume

Pros

  • Most powerful
  • Largest trunk

Cons

  • Slowest 0-100 km/h
  • Highest combined fuel consumption
  • Heaviest
  • Lowest top speed

Choose cars to compare

Brand
Model
Generation
Engine or modification
Jaguar XJ (X351) 5.0 V8
Infiniti FX II 50 V8
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