Car comparison

Alpina Roadster S 3.3 i 24VvsJaguar XK Convertible (X150) 4.2 V8

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

New comparison

Alpina Roadster S

3.3 i 24V

300 hp3346 ccGasolineRWDManualNaturally aspiratedCabriolet / convertible2003-2006
VS

Jaguar XK Convertible (X150)

4.2 V8

298 hp4196 ccGasolineRWDAutomaticNaturally aspiratedCabriolet / convertible2006-2009

Comparison overview

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

Best choices

Alpina Roadster S 3.3 i 24V

  • Quickest 0-100 km/h
    5.3 s
  • Fastest top speed
    265 km/h
    165 mph
  • Most powerful
    300 hp
    224 kW
  • Lightest
    1,320 kg
    2,910 lb
  • Best power-to-weight
    227 hp/t
    169 kW/t
    4.4 kg/hp
  • Lowest city consumption
    15.0 L/100 km
    15.7 mpg US
    18.8 mpg UK
  • Lowest highway consumption
    7.0 L/100 km
    33.6 mpg US
    40.4 mpg UK
  • Largest trunk
    240 L
  • Best overall score
    56/100
  • Best performance score
    67/100

Specification comparison

Specification comparison
ModelAlpinaRoadster S3.3 i 24VJaguarXK Convertible (X150)4.2 V8
Power
300hp224kW
298hp222kW
Torque
362Nm267lb-ft
411Nm303lb-ft
Curb weight
1,320kg2,910lb
1,660kg3,660lb
Gross weight
1,620kg3,571lb
2,075kg4,575lb
Top speed
265 km/h
165 mph
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Calculated
To 99% top speed
66.9s99% target: 262 km/h / 163 mph
Calculated
89.1s99% target: 257 km/h / 160 mph
Calculated
0-100 km/h
5.3s
6.3s
0-200 km/h
17.8s
Calculated
23.2s
Calculated
0-60 mph
5.0s
Calculated
6.0s
Calculated
Fuel consumption-
11.3L/100 km20.8mpg US25.0mpg UK
Fuel consumption city
15L/100 km15.7mpg US18.8mpg UK
17.1L/100 km13.8mpg US16.5mpg UK
Fuel consumption highway
7L/100 km33.6mpg US40.4mpg UK
8.1L/100 km29mpg US34.9mpg UK
Quarter mile
13.4s
Calculated
14.4s
Calculated
Power-to-weight
227hp/t169kW/t103hp/1000 lb
Calculated
180hp/t134kW/t81hp/1000 lb
Calculated
Torque-to-weight
274Nm/t183lb-ft/ton
Calculated
248Nm/t166lb-ft/ton
Calculated
Estimated range-
629km391mi
Calculated
Displacement
3,346cc204cu in
4,196cc256cu in
Length
4,090mm161in
4,791mm189in
Width
1,780mm70in
-
Height
1,300mm51in
1,329mm52in
Wheelbase
2,500mm98in
2,752mm108in
Front track
1,470mm58in
-
Rear track
1,520mm60in
-
Ground clearance-
120mm5in
Trunk volume
240L
200L
Max trunk volume
260L
283L
Doors
2
2
Seats
2
4
Fuel tank
55L
71L

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.

Alpina Roadster S 3.3 i 24VJaguar XK Convertible (X150) 4.2 V8PowerTorque
  • Alpina Roadster S 3.3 i 24V: Power / Torque
  • Jaguar XK Convertible (X150) 4.2 V8: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
AlpinaRoadster S3.3 i 24V6,300 rpm4,800 rpm6,550 rpm
JaguarXK Convertible (X150)4.2 V86,000 rpm4,100 rpm6,250 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricAlpinaRoadster S3.3 i 24VJaguarXK Convertible (X150)4.2 V8
Acceleration checkpoints
0-60 mph
0-97 km/h
5.0 s
6.0 s
0-100 km/h
0-62 mph
5.3 s
6.3 s
0-200 km/h
0-124 mph
17.8 s
23.2 s
Top speed
265 km/h
165 mph
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Limited
Drag race simulation
60 ft
18 m
2.3 s
2.4 s
330 ft
101 m
5.9 s
6.3 s
1/8 mile
201 m
8.8 s
9.4 s
1000 ft
305 m
11.3 s
12.1 s
1/4 mile
402 m
13.4 s
14.4 s
Trap speed
1/4 mile
402 m
176 km/h
109 mph
162 km/h
101 mph

Power comparison

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

Chart data table
VehicleValue
AlpinaRoadster S3.3 i 24V
300 hp
224 kW
JaguarXK Convertible (X150)4.2 V8
298 hp
222 kW

Alpina Roadster S 3.3 i 24V has 2 hp more than Jaguar XK Convertible (X150) 4.2 V8.

The biggest power difference is between Jaguar XK Convertible (X150) 4.2 V8 and Alpina Roadster S 3.3 i 24V: 2 hp (1 kW).

Torque comparison

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

Chart data table
VehicleValue
AlpinaRoadster S3.3 i 24V
362 Nm
267 lb-ft
JaguarXK Convertible (X150)4.2 V8
411 Nm
303 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
AlpinaRoadster S3.3 i 24V
1,320 kg
2,910 lb
JaguarXK Convertible (X150)4.2 V8
1,660 kg
3,660 lb

Top speed without limiter comparison

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

Chart data table
VehicleValue
AlpinaRoadster S3.3 i 24V
265 km/h
165 mph
JaguarXK Convertible (X150)4.2 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
AlpinaRoadster S3.3 i 24V5.3 s
JaguarXK Convertible (X150)4.2 V86.3 s

The biggest 0-100 km/h difference is between Alpina Roadster S 3.3 i 24V and Jaguar XK Convertible (X150) 4.2 V8: 1.0 s.

Power-to-weight comparison

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

Chart data table
VehicleValue
AlpinaRoadster S3.3 i 24V
227 hp/t
169 kW/t
4.4 kg/hp
JaguarXK Convertible (X150)4.2 V8
180 hp/t
134 kW/t
5.6 kg/hp

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
AlpinaRoadster S3.3 i 24V
300 hp
224 kW
5.3 s
265 km/h
165 mph
JaguarXK Convertible (X150)4.2 V8
298 hp
222 kW
6.3 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
AlpinaRoadster S3.3 i 24V
Power
300 hp
224 kW
0-100 km/h5.3 s
Top speed
265 km/h
165 mph
Doors/seats
2 doors
2 seats
Trunk
240 L
8.5 cu ft
Length
4,090 mm
161.0 in
Height
1,300 mm
51.2 in
JaguarXK Convertible (X150)4.2 V8
Power
298 hp
222 kW
0-100 km/h6.3 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
4,791 mm
188.6 in
Height
1,329 mm
52.3 in

Detailed score breakdown

Detailed score breakdown
VehicleAlpinaRoadster S3.3 i 24VJaguarXK Convertible (X150)4.2 V8
Power
300 hp
224 kW
298 hp
222 kW
Torque
362 Nm
267 lb-ft
411 Nm
303 lb-ft
Acceleration
5.3 s
6.3 s
Top speed
265 km/h
165 mph
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Lightness
1,320 kg
2,910 lb
1,660 kg
3,660 lb
Fuel consumption
-
11.3 L/100 km
20.8 mpg US
25.0 mpg UK
Practicality
Doors/seats
2 doors
2 seats
Trunk
240 L
8.5 cu ft
Length
4,090 mm
161.0 in
Height
1,300 mm
51.2 in
Doors/seats
2 doors
4 seats
Trunk
200 L
7.1 cu ft
Length
4,791 mm
188.6 in
Height
1,329 mm
52.3 in
Range score
-
629 km
391 mi
Trunk score
240 L
8.5 cu ft
200 L
7.1 cu ft
Power-to-weight score
227 hp/t
169 kW/t
4.4 kg/hp
180 hp/t
134 kW/t
5.6 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 XK Convertible (X150) 4.2 V8
Consumption11.3 L/100 km20.8 mpg US25 mpg UK
Cost / 100 km19.78 LC100 km
Cost / 100 mi31.82 LC100 mi
Annual fuel used1,695 L448 US gal373 UK gal
Annual fuel cost2,966 LC/year

Head-to-head comparisons

Alpina Roadster S 3.3 i 24V

  • Has 2 hp more
  • Is 340 kg lighter
  • Is 1.0 s quicker from 0-100 km/h
  • Has 5 km/h (3 mph) higher top speed
  • Has 48 hp/t better power-to-weight
  • Has 40 L more trunk volume

Pros

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

Choose cars to compare

Brand
Model
Generation
Engine or modification
Alpina Roadster S 3.3 i 24V
Jaguar XK Convertible (X150) 4.2 V8
Compare selected cars
2 vehicles selected

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