Car comparison

Jaguar XJ (X351) · Facelift 2015 R 5.0 V8vsRolls-Royce Phantom VIII Extended Wheelbase 6.7 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

550 hp5000 ccGasolineRWDAutomaticSuperchargedSedan2015-2017
VS

Rolls-Royce Phantom VIII Extended Wheelbase

6.7 V12

571 hp6749 ccGasolineRWDAutomaticTwin-turboSedan2017-present

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
    4.6 s
  • Fastest top speed
    295 km/h
    183 mph Unrestricted
    280 km/h
    174 mph Restricted
  • Lightest
    1,875 kg
    4,134 lb
  • Best power-to-weight
    293 hp/t
    219 kW/t
    3.4 kg/hp
  • Lowest combined fuel consumption
    11.1 L/100 km
    21.2 mpg US
    25.4 mpg UK
  • Lowest city consumption
    16.2 L/100 km
    14.5 mpg US
    17.4 mpg UK
  • Lowest highway consumption
    8.2 L/100 km
    28.7 mpg US
    34.4 mpg UK
  • Lowest CO2 emissions
    264 g/km
  • Best overall score
    83/100
  • Best performance score
    86/100
  • Best economy score
    77/100
  • Best practicality score
    78/100

Specification comparison

Specification comparison
ModelJaguarXJ (X351)Facelift 2015R 5.0 V8Rolls-RoycePhantom VIII Extended Wheelbase6.7 V12
Power
550hp410kW
571hp426kW
Torque
680Nm502lb-ft
900Nm664lb-ft
Curb weight
1,875kg4,134lb
2,610kg5,754lb
Gross weight
2,400kg5,291lb
-
Top speed
Unrestricted
295 km/h183 mph
Restricted
280 km/h174 mph
Calculated
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Calculated
To 99% top speed
48.8s99% target: 292 km/h / 181 mph
Calculated
59.2s99% target: 262 km/h / 163 mph
Calculated
0-100 km/h
4.6s
5.4s
0-200 km/h
12.3s
Calculated
17.0s
Calculated
0-60 mph
4.4s
Calculated
5.2s
Calculated
Fuel consumption
11.1L/100 km21.2mpg US25.4mpg UK
13.9L/100 km16.9mpg US20.3mpg UK
Fuel consumption city
16.2L/100 km14.5mpg US17.4mpg UK
21.3L/100 km11mpg US13.3mpg UK
Fuel consumption highway
8.2L/100 km28.7mpg US34.4mpg UK
9.7L/100 km24.2mpg US29.1mpg UK
Quarter mile
12.3s
Calculated
13.4s
Calculated
Power-to-weight
293hp/t219kW/t133hp/1000 lb
Calculated
219hp/t163kW/t99hp/1000 lb
Calculated
Torque-to-weight
363Nm/t243lb-ft/ton
Calculated
345Nm/t231lb-ft/ton
Calculated
Estimated range
721km448mi
Calculated
-
Displacement
5,000cc305cu in
6,749cc412cu in
Length
5,130mm202in
5,982mm236in
Width
1,899mm75in
2,018mm79in
Height
1,460mm57in
1,656mm65in
Wheelbase
3,032mm119in
3,772mm149in
Front track
1,626mm64in
-
Rear track
1,604mm63in
-
Doors
4
4
Seats
5
4
Fuel tank
80L
-
CO2 emissions
264g/km
319g/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 Phantom VIII Extended Wheelbase 6.7 V12PowerTorque
  • Jaguar XJ (X351) Facelift 2015 R 5.0 V8: Power / Torque
  • Rolls-Royce Phantom VIII Extended Wheelbase 6.7 V12: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
JaguarXJ (X351)Facelift 2015R 5.0 V86,000-6,500 rpm3,500-4,000 rpm6,750 rpm
Rolls-RoycePhantom VIII Extended Wheelbase6.7 V125,000 rpm1,700 rpm5,250 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricJaguarXJ (X351)Facelift 2015R 5.0 V8Rolls-RoycePhantom VIII Extended Wheelbase6.7 V12
Acceleration checkpoints
0-60 mph
0-97 km/h
4.4 s
5.2 s
0-100 km/h
0-62 mph
4.6 s
5.4 s
0-200 km/h
0-124 mph
12.3 s
17.0 s
Top speed
Unrestricted
295 km/h183 mph
Restricted
280 km/h174 mph
Likely limited
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Likely limited
Drag race simulation
60 ft
18 m
2.3 s
2.4 s
330 ft
101 m
5.7 s
6.0 s
1/8 mile
201 m
8.3 s
8.9 s
1000 ft
305 m
10.5 s
11.3 s
1/4 mile
402 m
12.3 s
13.4 s
Trap speed
1/4 mile
402 m
200 km/h
124 mph
179 km/h
111 mph

Power comparison

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

Chart data table
VehicleValue
JaguarXJ (X351)Facelift 2015R 5.0 V8
550 hp
410 kW
Rolls-RoycePhantom VIII Extended Wheelbase6.7 V12
571 hp
426 kW

Rolls-Royce Phantom VIII Extended Wheelbase 6.7 V12 has 21 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 Phantom VIII Extended Wheelbase 6.7 V12: 21 hp (16 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
680 Nm
502 lb-ft
Rolls-RoycePhantom VIII Extended Wheelbase6.7 V12
900 Nm
664 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-RoycePhantom VIII Extended Wheelbase6.7 V12
2,610 kg
5,754 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
295 km/h183 mph
Restricted
280 km/h174 mph
Rolls-RoycePhantom VIII Extended Wheelbase6.7 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 V84.6 s
Rolls-RoycePhantom VIII Extended Wheelbase6.7 V125.4 s

Although Rolls-Royce Phantom VIII Extended Wheelbase 6.7 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 Phantom VIII Extended Wheelbase 6.7 V12: 0.8 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-RoycePhantom VIII Extended Wheelbase6.7 V12
13.9 L/100 km
16.9 mpg US
20.3 mpg UK

The biggest fuel consumption difference is between Jaguar XJ (X351) Facelift 2015 R 5.0 V8 and Rolls-Royce Phantom VIII Extended Wheelbase 6.7 V12: 2.8 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)Facelift 2015R 5.0 V8
293 hp/t
219 kW/t
3.4 kg/hp
Rolls-RoycePhantom VIII Extended Wheelbase6.7 V12
219 hp/t
163 kW/t
4.6 kg/hp

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
JaguarXJ (X351)Facelift 2015R 5.0 V8
550 hp
410 kW
4.6 s
Unrestricted
295 km/h183 mph
Restricted
280 km/h174 mph
Rolls-RoycePhantom VIII Extended Wheelbase6.7 V12
571 hp
426 kW
5.4 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
550 hp
410 kW
0-100 km/h4.6 s
Top speed
Unrestricted
295 km/h183 mph
Restricted
280 km/h174 mph
Doors/seats
4 doors
5 seats
Trunk-
Length
5,130 mm
202.0 in
Height
1,460 mm
57.5 in
Rolls-RoycePhantom VIII Extended Wheelbase6.7 V12
Power
571 hp
426 kW
0-100 km/h5.4 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Doors/seats
4 doors
4 seats
Trunk-
Length
5,982 mm
235.5 in
Height
1,656 mm
65.2 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
JaguarXJ (X351)Facelift 2015R 5.0 V8
Power
550 hp
410 kW
0-100 km/h4.6 s
Top speed
Unrestricted
295 km/h183 mph
Restricted
280 km/h174 mph
11.1 L/100 km
21.2 mpg US
25.4 mpg UK
Rolls-RoycePhantom VIII Extended Wheelbase6.7 V12
Power
571 hp
426 kW
0-100 km/h5.4 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
13.9 L/100 km
16.9 mpg US
20.3 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
4.6 s
Rolls-RoycePhantom VIII Extended Wheelbase6.7 V12
13.9 L/100 km
16.9 mpg US
20.3 mpg UK
5.4 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
293 hp/t
219 kW/t
3.4 kg/hp
11.1 L/100 km
21.2 mpg US
25.4 mpg UK
Rolls-RoycePhantom VIII Extended Wheelbase6.7 V12
219 hp/t
163 kW/t
4.6 kg/hp
13.9 L/100 km
16.9 mpg US
20.3 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleJaguarXJ (X351)Facelift 2015R 5.0 V8Rolls-RoycePhantom VIII Extended Wheelbase6.7 V12
Power
550 hp
410 kW
571 hp
426 kW
Torque
680 Nm
502 lb-ft
900 Nm
664 lb-ft
Acceleration
4.6 s
5.4 s
Top speed
Unrestricted
295 km/h183 mph
Restricted
280 km/h174 mph
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Lightness
1,875 kg
4,134 lb
2,610 kg
5,754 lb
Fuel consumption
11.1 L/100 km
21.2 mpg US
25.4 mpg UK
13.9 L/100 km
16.9 mpg US
20.3 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
4 seats
Trunk-
Length
5,982 mm
235.5 in
Height
1,656 mm
65.2 in
Range score
721 km
448 mi
-
CO2 score
264 g/km
319 g/km
Power-to-weight score
293 hp/t
219 kW/t
3.4 kg/hp
219 hp/t
163 kW/t
4.6 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
VehicleJaguar XJ (X351) Facelift 2015 R 5.0 V8Rolls-Royce Phantom VIII Extended Wheelbase 6.7 V12
Consumption11.1 L/100 km21.2 mpg US25.4 mpg UK13.9 L/100 km16.9 mpg US20.3 mpg UK
Cost / 100 km19.43 LC100 km24.33 LC100 km
Cost / 100 mi31.26 LC100 mi39.15 LC100 mi
Annual fuel used1,665 L440 US gal366 UK gal2,085 L551 US gal459 UK gal
Annual fuel cost2,914 LC/year3,649 LC/year

Head-to-head comparisons

Jaguar XJ (X351) Facelift 2015 R 5.0 V8

  • Is 735 kg lighter
  • Is 0.8 s quicker from 0-100 km/h
  • Has 30 km/h (19 mph) higher top speed
  • Uses 2.8 L/100 km less fuel
  • Has 75 hp/t better power-to-weight
  • Emits 55 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

Cons

  • Lowest power

Choose cars to compare

Brand
Model
Generation
Engine or modification
Jaguar XJ (X351) R 5.0 V8
Rolls-Royce Phantom VIII Extended Wheelbase 6.7 V12
Compare selected cars
2 vehicles selected

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