Car comparison

Jaguar XJ (X358) R 4.2 V8vsMercedes-Benz S-class (W221) S 500

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

New comparison

Jaguar XJ (X358)

R 4.2 V8

395 hp4196 ccGasolineRWDAutomaticSuperchargedSedan2007-2009
VS

Mercedes-Benz S-class (W221)

S 500

388 hp5461 ccGasolineRWDAutomaticNaturally aspiratedSedan2005-2009

Comparison overview

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

Best choices

Jaguar XJ (X358) R 4.2 V8

  • Quickest 0-100 km/h
    5.3 s
  • Fastest top speed
    265 km/h
    165 mph Unrestricted
    250 km/h
    155 mph Restricted
  • Most powerful
    395 hp
    295 kW
  • Highest torque
    541 Nm
    399 lb-ft
  • Lightest
    1,653 kg
    3,644 lb
  • Best power-to-weight
    239 hp/t
    178 kW/t
    4.2 kg/hp
  • Lowest highway consumption
    8.7 L/100 km
    27.0 mpg US
    32.5 mpg UK
  • Best performance score
    74/100

Mercedes-Benz S-class (W221) S 500

  • Lowest combined fuel consumption
    11.9 L/100 km
    19.8 mpg US
    23.7 mpg UK
  • Lowest city consumption
    17.6 L/100 km
    13.4 mpg US
    16.1 mpg UK
  • Best estimated range
    756 km
    470 mi
  • Largest trunk
    560 L
  • Best overall score
    75/100
  • Best economy score
    75/100
  • Best practicality score
    78/100

Specification comparison

Specification comparison
ModelJaguarXJ (X358)R 4.2 V8Mercedes-BenzS-class (W221)S 500
Power
395hp295kW
388hp289kW
Torque
541Nm399lb-ft
530Nm391lb-ft
Curb weight
1,653kg3,644lb
1,865kg4,112lb
Gross weight
2,263kg4,989lb
2,545kg5,611lb
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Calculated
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Calculated
To 99% top speed
52.0s99% target: 262 km/h / 163 mph
Calculated
52.3s99% target: 262 km/h / 163 mph
Calculated
0-100 km/h
5.3s
5.4s
0-200 km/h
15.8s
Calculated
16.0s
Calculated
0-60 mph
5.1s
Calculated
5.2s
Calculated
Fuel consumption
12.1L/100 km19.4mpg US23.3mpg UK
11.9L/100 km19.8mpg US23.7mpg UK
Fuel consumption city
17.9L/100 km13.1mpg US15.8mpg UK
17.6L/100 km13.4mpg US16.1mpg UK
Fuel consumption highway
8.7L/100 km27mpg US32.5mpg UK
8.7L/100 km27mpg US32.5mpg UK
Quarter mile
13.2s
Calculated
13.3s
Calculated
Power-to-weight
239hp/t178kW/t108hp/1000 lb
Calculated
208hp/t155kW/t94hp/1000 lb
Calculated
Torque-to-weight
327Nm/t219lb-ft/ton
Calculated
284Nm/t190lb-ft/ton
Calculated
Estimated range
702km437mi
Calculated
756km470mi
Calculated
Displacement
4,196cc256cu in
5,461cc333cu in
Length
5,091mm200in
5,079mm200in
Width
1,860mm73in
1,872mm74in
Height
1,462mm58in
1,473mm58in
Wheelbase
3,034mm119in
3,035mm119in
Front track
1,556mm61in
1,604mm63in
Rear track
1,546mm61in
1,606mm63in
Trunk volume
470L
560L
Doors
4
4
Seats
5
5
Fuel tank
85L
90L
CO2 emissions-
283g/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 (X358) R 4.2 V8Mercedes-Benz S-class (W221) S 500PowerTorque
  • Jaguar XJ (X358) R 4.2 V8: Power / Torque
  • Mercedes-Benz S-class (W221) S 500: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
JaguarXJ (X358)R 4.2 V86,100 rpm3,500 rpm6,350 rpm
Mercedes-BenzS-class (W221)S 5006,000 rpm2,800 rpm6,250 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricJaguarXJ (X358)R 4.2 V8Mercedes-BenzS-class (W221)S 500
Acceleration checkpoints
0-60 mph
0-97 km/h
5.1 s
5.2 s
0-100 km/h
0-62 mph
5.3 s
5.4 s
0-200 km/h
0-124 mph
15.8 s
16.0 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Limited
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Likely limited
Drag race simulation
60 ft
18 m
2.4 s
2.5 s
330 ft
101 m
6.0 s
6.1 s
1/8 mile
201 m
8.8 s
8.9 s
1000 ft
305 m
11.2 s
11.3 s
1/4 mile
402 m
13.2 s
13.3 s
Trap speed
1/4 mile
402 m
183 km/h
114 mph
183 km/h
114 mph

Power comparison

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

Chart data table
VehicleValue
JaguarXJ (X358)R 4.2 V8
395 hp
295 kW
Mercedes-BenzS-class (W221)S 500
388 hp
289 kW

Jaguar XJ (X358) R 4.2 V8 has 7 hp more than Mercedes-Benz S-class (W221) S 500.

The biggest power difference is between Mercedes-Benz S-class (W221) S 500 and Jaguar XJ (X358) R 4.2 V8: 7 hp (5 kW).

Torque comparison

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

Chart data table
VehicleValue
JaguarXJ (X358)R 4.2 V8
541 Nm
399 lb-ft
Mercedes-BenzS-class (W221)S 500
530 Nm
391 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
JaguarXJ (X358)R 4.2 V8
1,653 kg
3,644 lb
Mercedes-BenzS-class (W221)S 500
1,865 kg
4,112 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 (X358)R 4.2 V8
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Mercedes-BenzS-class (W221)S 500
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 (X358)R 4.2 V85.3 s
Mercedes-BenzS-class (W221)S 5005.4 s

The biggest 0-100 km/h difference is between Jaguar XJ (X358) R 4.2 V8 and Mercedes-Benz S-class (W221) S 500: 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 (X358)R 4.2 V8
12.1 L/100 km
19.4 mpg US
23.3 mpg UK
Mercedes-BenzS-class (W221)S 500
11.9 L/100 km
19.8 mpg US
23.7 mpg UK

Power-to-weight comparison

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

Chart data table
VehicleValue
JaguarXJ (X358)R 4.2 V8
239 hp/t
178 kW/t
4.2 kg/hp
Mercedes-BenzS-class (W221)S 500
208 hp/t
155 kW/t
4.8 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
JaguarXJ (X358)R 4.2 V8
702 km
437 mi
Mercedes-BenzS-class (W221)S 500
756 km
470 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
JaguarXJ (X358)R 4.2 V8
395 hp
295 kW
5.3 s
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Mercedes-BenzS-class (W221)S 500
388 hp
289 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 (X358)R 4.2 V8
Power
395 hp
295 kW
0-100 km/h5.3 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Doors/seats
4 doors
5 seats
Trunk
470 L
16.6 cu ft
Length
5,091 mm
200.4 in
Height
1,462 mm
57.6 in
Mercedes-BenzS-class (W221)S 500
Power
388 hp
289 kW
0-100 km/h5.4 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Doors/seats
4 doors
5 seats
Trunk
560 L
19.8 cu ft
Length
5,079 mm
200.0 in
Height
1,473 mm
58.0 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 (X358)R 4.2 V8
Power
395 hp
295 kW
0-100 km/h5.3 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
12.1 L/100 km
19.4 mpg US
23.3 mpg UK
Mercedes-BenzS-class (W221)S 500
Power
388 hp
289 kW
0-100 km/h5.4 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
11.9 L/100 km
19.8 mpg US
23.7 mpg UK

Jaguar XJ (X358) R 4.2 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 (X358)R 4.2 V8
12.1 L/100 km
19.4 mpg US
23.3 mpg UK
5.3 s
Mercedes-BenzS-class (W221)S 500
11.9 L/100 km
19.8 mpg US
23.7 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 (X358)R 4.2 V8
239 hp/t
178 kW/t
4.2 kg/hp
12.1 L/100 km
19.4 mpg US
23.3 mpg UK
Mercedes-BenzS-class (W221)S 500
208 hp/t
155 kW/t
4.8 kg/hp
11.9 L/100 km
19.8 mpg US
23.7 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleJaguarXJ (X358)R 4.2 V8Mercedes-BenzS-class (W221)S 500
Power
395 hp
295 kW
388 hp
289 kW
Torque
541 Nm
399 lb-ft
530 Nm
391 lb-ft
Acceleration
5.3 s
5.4 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Lightness
1,653 kg
3,644 lb
1,865 kg
4,112 lb
Fuel consumption
12.1 L/100 km
19.4 mpg US
23.3 mpg UK
11.9 L/100 km
19.8 mpg US
23.7 mpg UK
Practicality
Doors/seats
4 doors
5 seats
Trunk
470 L
16.6 cu ft
Length
5,091 mm
200.4 in
Height
1,462 mm
57.6 in
Doors/seats
4 doors
5 seats
Trunk
560 L
19.8 cu ft
Length
5,079 mm
200.0 in
Height
1,473 mm
58.0 in
Range score
702 km
437 mi
756 km
470 mi
CO2 score
-
283 g/km
Trunk score
470 L
16.6 cu ft
560 L
19.8 cu ft
Power-to-weight score
239 hp/t
178 kW/t
4.2 kg/hp
208 hp/t
155 kW/t
4.8 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 (X358) R 4.2 V8Mercedes-Benz S-class (W221) S 500
Consumption12.1 L/100 km19.4 mpg US23.3 mpg UK11.9 L/100 km19.8 mpg US23.7 mpg UK
Cost / 100 km21.18 LC100 km20.83 LC100 km
Cost / 100 mi34.08 LC100 mi33.51 LC100 mi
Annual fuel used1,815 L479 US gal399 UK gal1,785 L472 US gal393 UK gal
Annual fuel cost3,176 LC/year3,124 LC/year

Head-to-head comparisons

Jaguar XJ (X358) R 4.2 V8

  • Has 7 hp more
  • Has 11 Nm more
  • Is 212 kg lighter
  • Is 0.1 s quicker from 0-100 km/h
  • Has 31 hp/t better power-to-weight

Pros

  • Quickest 0-100 km/h in this comparison
  • Highest top speed
  • Most powerful
  • Highest torque
  • Lightest
  • Best power-to-weight ratio

Cons

  • Highest combined fuel consumption
  • Smallest trunk

Mercedes-Benz S-class (W221) S 500

  • Uses 0.2 L/100 km less fuel
  • Has 54 km (33 mi) more estimated range
  • Has 90 L more trunk volume

Pros

  • Lowest combined fuel consumption
  • Best estimated range
  • Largest trunk

Cons

  • Slowest 0-100 km/h
  • Lowest power
  • Heaviest

Choose cars to compare

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Model
Generation
Engine or modification
Jaguar XJ (X358) R 4.2 V8
Mercedes-Benz S-class (W221) S 500
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