Car comparison

Jaguar XJ (X351) · Facelift 2015 R 5.0 V8vsRolls-Royce Ghost I · Facelift 2014 6.6 V12

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

New comparison

Jaguar XJ (X351) · Facelift 2015

R 5.0 V8

575 hp5000 ccGasolineRWDAutomaticSuperchargedSedan2017-2018
VS

Rolls-Royce Ghost I · Facelift 2014

6.6 V12

612 hp6592 ccGasolineRWDAutomaticTwin-turboSedan2016-2020

Comparison overview

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

Best choices

Jaguar XJ (X351) Facelift 2015 R 5.0 V8

  • Quickest 0-100 km/h
    4.4 s
  • Fastest top speed
    315 km/h
    196 mph Unrestricted
    300 km/h
    186 mph Restricted
  • Lightest
    1,875 kg
    4,134 lb
  • Best power-to-weight
    307 hp/t
    229 kW/t
    3.3 kg/hp
  • Lowest combined fuel consumption
    11.1 L/100 km
    21.2 mpg US
    25.4 mpg UK
  • Lowest CO2 emissions
    264 g/km
  • Best estimated range
    721 km
    448 mi
  • Best overall score
    85/100
  • Best performance score
    88/100
  • Best economy score
    77/100
  • Best practicality score
    78/100

Specification comparison

Specification comparison
ModelJaguarXJ (X351)Facelift 2015R 5.0 V8Rolls-RoyceGhost IFacelift 20146.6 V12
Power
575hp429kW
612hp456kW
Torque
700Nm516lb-ft
840Nm620lb-ft
Curb weight
1,875kg4,134lb
2,490kg5,490lb
Gross weight-
2,940kg6,482lb
Top speed
Unrestricted
315 km/h196 mph
Restricted
300 km/h186 mph
Calculated
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Calculated
To 99% top speed
49.5s99% target: 312 km/h / 194 mph
Calculated
52.2s99% target: 262 km/h / 163 mph
Calculated
0-100 km/h
4.4s
4.8s
0-200 km/h
11.3s
Calculated
15.0s
Calculated
0-60 mph
4.2s
Calculated
4.6s
Calculated
Fuel consumption
11.1L/100 km21.2mpg US25.4mpg UK
14.6L/100 km16.1mpg US19.3mpg UK
Fuel consumption city-
22.2L/100 km10.6mpg US12.7mpg UK
Fuel consumption highway-
10.1L/100 km23.3mpg US28.0mpg UK
Quarter mile
12.0s
Calculated
12.8s
Calculated
Power-to-weight
307hp/t229kW/t139hp/1000 lb
Calculated
246hp/t183kW/t111hp/1000 lb
Calculated
Torque-to-weight
373Nm/t250lb-ft/ton
Calculated
337Nm/t226lb-ft/ton
Calculated
Estimated range
721km448mi
Calculated
562km349mi
Calculated
Displacement
5,000cc305cu in
6,592cc402cu in
Length
5,130mm202in
5,399mm213in
Width
1,899mm75in
1,948mm77in
Height
1,460mm57in
1,550mm61in
Wheelbase
3,032mm119in
3,295mm130in
Front track
1,626mm64in
1,622mm64in
Rear track
1,604mm63in
1,660mm65in
Trunk volume-
490L
Doors
4
4
Seats
5
5
Fuel tank
80L
82L
CO2 emissions
264g/km
333g/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.

Jaguar XJ (X351) Facelift 2015 R 5.0 V8Rolls-Royce Ghost I Facelift 2014 6.6 V12PowerTorque
  • Jaguar XJ (X351) Facelift 2015 R 5.0 V8: Power / Torque
  • Rolls-Royce Ghost I Facelift 2014 6.6 V12: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
JaguarXJ (X351)Facelift 2015R 5.0 V86,250-6,500 rpm3,500-4,500 rpm6,750 rpm
Rolls-RoyceGhost IFacelift 20146.6 V125,250 rpm1,650-5,000 rpm5,500 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricJaguarXJ (X351)Facelift 2015R 5.0 V8Rolls-RoyceGhost IFacelift 20146.6 V12
Acceleration checkpoints
0-60 mph
0-97 km/h
4.2 s
4.6 s
0-100 km/h
0-62 mph
4.4 s
4.8 s
0-200 km/h
0-124 mph
11.3 s
15.0 s
Top speed
Unrestricted
315 km/h196 mph
Restricted
300 km/h186 mph
Likely limited
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Limited
Drag race simulation
60 ft
18 m
2.3 s
2.3 s
330 ft
101 m
5.6 s
5.7 s
1/8 mile
201 m
8.1 s
8.5 s
1000 ft
305 m
10.3 s
10.8 s
1/4 mile
402 m
12.0 s
12.8 s
Trap speed
1/4 mile
402 m
207 km/h
129 mph
186 km/h
115 mph

Power comparison

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

Chart data table
VehicleValue
JaguarXJ (X351)Facelift 2015R 5.0 V8
575 hp
429 kW
Rolls-RoyceGhost IFacelift 20146.6 V12
612 hp
456 kW

Rolls-Royce Ghost I Facelift 2014 6.6 V12 has 37 hp more than Jaguar XJ (X351) Facelift 2015 R 5.0 V8.

The biggest power difference is between Jaguar XJ (X351) Facelift 2015 R 5.0 V8 and Rolls-Royce Ghost I Facelift 2014 6.6 V12: 37 hp (28 kW).

Torque comparison

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

Chart data table
VehicleValue
JaguarXJ (X351)Facelift 2015R 5.0 V8
700 Nm
516 lb-ft
Rolls-RoyceGhost IFacelift 20146.6 V12
840 Nm
620 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
JaguarXJ (X351)Facelift 2015R 5.0 V8
1,875 kg
4,134 lb
Rolls-RoyceGhost IFacelift 20146.6 V12
2,490 kg
5,490 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)Facelift 2015R 5.0 V8
Unrestricted
315 km/h196 mph
Restricted
300 km/h186 mph
Rolls-RoyceGhost IFacelift 20146.6 V12
Unrestricted
265 km/h165 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)Facelift 2015R 5.0 V84.4 s
Rolls-RoyceGhost IFacelift 20146.6 V124.8 s

Although Rolls-Royce Ghost I Facelift 2014 6.6 V12 has more power, Jaguar XJ (X351) Facelift 2015 R 5.0 V8 is quicker from 0-100 km/h.

The biggest 0-100 km/h difference is between Jaguar XJ (X351) Facelift 2015 R 5.0 V8 and Rolls-Royce Ghost I Facelift 2014 6.6 V12: 0.4 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)Facelift 2015R 5.0 V8
11.1 L/100 km
21.2 mpg US
25.4 mpg UK
Rolls-RoyceGhost IFacelift 20146.6 V12
14.6 L/100 km
16.1 mpg US
19.3 mpg UK

The biggest fuel consumption difference is between Jaguar XJ (X351) Facelift 2015 R 5.0 V8 and Rolls-Royce Ghost I Facelift 2014 6.6 V12: 3.5 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)Facelift 2015R 5.0 V8
307 hp/t
229 kW/t
3.3 kg/hp
Rolls-RoyceGhost IFacelift 20146.6 V12
246 hp/t
183 kW/t
4.1 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
JaguarXJ (X351)Facelift 2015R 5.0 V8
721 km
448 mi
Rolls-RoyceGhost IFacelift 20146.6 V12
562 km
349 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
JaguarXJ (X351)Facelift 2015R 5.0 V8
575 hp
429 kW
4.4 s
Unrestricted
315 km/h196 mph
Restricted
300 km/h186 mph
Rolls-RoyceGhost IFacelift 20146.6 V12
612 hp
456 kW
4.8 s
Unrestricted
265 km/h165 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)Facelift 2015R 5.0 V8
Power
575 hp
429 kW
0-100 km/h4.4 s
Top speed
Unrestricted
315 km/h196 mph
Restricted
300 km/h186 mph
Doors/seats
4 doors
5 seats
Trunk-
Length
5,130 mm
202.0 in
Height
1,460 mm
57.5 in
Rolls-RoyceGhost IFacelift 20146.6 V12
Power
612 hp
456 kW
0-100 km/h4.8 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Doors/seats
4 doors
5 seats
Trunk
490 L
17.3 cu ft
Length
5,399 mm
212.6 in
Height
1,550 mm
61.0 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)Facelift 2015R 5.0 V8
Power
575 hp
429 kW
0-100 km/h4.4 s
Top speed
Unrestricted
315 km/h196 mph
Restricted
300 km/h186 mph
11.1 L/100 km
21.2 mpg US
25.4 mpg UK
Rolls-RoyceGhost IFacelift 20146.6 V12
Power
612 hp
456 kW
0-100 km/h4.8 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
14.6 L/100 km
16.1 mpg US
19.3 mpg UK

Jaguar XJ (X351) Facelift 2015 R 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)Facelift 2015R 5.0 V8
11.1 L/100 km
21.2 mpg US
25.4 mpg UK
4.4 s
Rolls-RoyceGhost IFacelift 20146.6 V12
14.6 L/100 km
16.1 mpg US
19.3 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
JaguarXJ (X351)Facelift 2015R 5.0 V8
307 hp/t
229 kW/t
3.3 kg/hp
11.1 L/100 km
21.2 mpg US
25.4 mpg UK
Rolls-RoyceGhost IFacelift 20146.6 V12
246 hp/t
183 kW/t
4.1 kg/hp
14.6 L/100 km
16.1 mpg US
19.3 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleJaguarXJ (X351)Facelift 2015R 5.0 V8Rolls-RoyceGhost IFacelift 20146.6 V12
Power
575 hp
429 kW
612 hp
456 kW
Torque
700 Nm
516 lb-ft
840 Nm
620 lb-ft
Acceleration
4.4 s
4.8 s
Top speed
Unrestricted
315 km/h196 mph
Restricted
300 km/h186 mph
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Lightness
1,875 kg
4,134 lb
2,490 kg
5,490 lb
Fuel consumption
11.1 L/100 km
21.2 mpg US
25.4 mpg UK
14.6 L/100 km
16.1 mpg US
19.3 mpg UK
Practicality
Doors/seats
4 doors
5 seats
Trunk-
Length
5,130 mm
202.0 in
Height
1,460 mm
57.5 in
Doors/seats
4 doors
5 seats
Trunk
490 L
17.3 cu ft
Length
5,399 mm
212.6 in
Height
1,550 mm
61.0 in
Range score
721 km
448 mi
562 km
349 mi
CO2 score
264 g/km
333 g/km
Trunk score
-
490 L
17.3 cu ft
Power-to-weight score
307 hp/t
229 kW/t
3.3 kg/hp
246 hp/t
183 kW/t
4.1 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) Facelift 2015 R 5.0 V8Rolls-Royce Ghost I Facelift 2014 6.6 V12
Consumption11.1 L/100 km21.2 mpg US25.4 mpg UK14.6 L/100 km16.1 mpg US19.3 mpg UK
Cost / 100 km19.43 LC100 km25.55 LC100 km
Cost / 100 mi31.26 LC100 mi41.12 LC100 mi
Annual fuel used1,665 L440 US gal366 UK gal2,190 L579 US gal482 UK gal
Annual fuel cost2,914 LC/year3,833 LC/year

Head-to-head comparisons

Jaguar XJ (X351) Facelift 2015 R 5.0 V8

  • Is 615 kg lighter
  • Is 0.4 s quicker from 0-100 km/h
  • Has 50 km/h (31 mph) higher top speed
  • Uses 3.5 L/100 km less fuel
  • Has 61 hp/t better power-to-weight
  • Has 159 km (99 mi) more estimated range
  • Emits 69 g/km less CO2

Pros

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

Cons

  • Lowest power

Choose cars to compare

Brand
Model
Generation
Engine or modification
Jaguar XJ (X351) R 5.0 V8
Rolls-Royce Ghost I 6.6 V12
Compare selected cars
2 vehicles selected

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