Car comparison

Alpina B6 Cabrio (E64) 4.4 V8vsBMW M6 Convertible (E64) 5.0 V10

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

New comparison

Alpina B6 Cabrio (E64)

4.4 V8

500 hp4398 ccGasolineRWDAutomaticSuperchargedCabriolet / convertible2005-2008
VS

BMW M6 Convertible (E64)

5.0 V10

507 hp4999 ccGasolineRWDAutomaticNaturally aspiratedCabriolet / convertible2006-2007

Comparison overview

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

Best choices

Alpina B6 Cabrio (E64) 4.4 V8

  • Fastest top speed
    320 km/h
    199 mph Unrestricted
    310 km/h
    193 mph Restricted
  • Highest torque
    700 Nm
    516 lb-ft
  • Lightest
    1,930 kg
    4,255 lb
  • Lowest combined fuel consumption
    12.8 L/100 km
    18.4 mpg US
    22.1 mpg UK
  • Lowest city consumption
    18.9 L/100 km
    12.4 mpg US
    14.9 mpg UK
  • Lowest highway consumption
    9.3 L/100 km
    25.3 mpg US
    30.4 mpg UK
  • Best estimated range
    547 km
    340 mi
  • Largest trunk
    450 L
  • Best overall score
    75/100
  • Best performance score
    87/100
  • Best economy score
    73/100
  • Best practicality score
    48/100

Specification comparison

Specification comparison
ModelAlpinaB6 Cabrio (E64)4.4 V8BMWM6 Convertible (E64)5.0 V10
Power
500hp373kW
507hp378kW
Torque
700Nm516lb-ft
520Nm384lb-ft
Curb weight
1,930kg4,255lb
1,930kg4,255lb
Gross weight
2,350kg5,181lb
2,380kg5,247lb
Top speed
Unrestricted
320 km/h199 mph
Restricted
310 km/h193 mph
Calculated
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Calculated
To 99% top speed
84.3s99% target: 317 km/h / 197 mph
Calculated
62.6s99% target: 257 km/h / 160 mph
Calculated
0-100 km/h
4.9s
4.8s
0-200 km/h
14.6s
Calculated
17.0s
Calculated
0-60 mph
4.7s
Calculated
4.6s
Calculated
Fuel consumption
12.8L/100 km18.4mpg US22.1mpg UK
15.2L/100 km15.5mpg US18.6mpg UK
Fuel consumption city
18.9L/100 km12.4mpg US14.9mpg UK
22.8L/100 km10.3mpg US12.4mpg UK
Fuel consumption highway
9.3L/100 km25.3mpg US30.4mpg UK
10.7L/100 km22mpg US26.4mpg UK
Quarter mile
12.8s
Calculated
12.9s
Calculated
Power-to-weight
259hp/t193kW/t118hp/1000 lb
Calculated
263hp/t196kW/t119hp/1000 lb
Calculated
Torque-to-weight
363Nm/t243lb-ft/ton
Calculated
269Nm/t180lb-ft/ton
Calculated
Estimated range
547km340mi
Calculated
461km286mi
Calculated
Displacement
4,398cc268cu in
4,999cc305cu in
Length
4,820mm190in
4,871mm192in
Width
1,855mm73in
1,855mm73in
Height
1,371mm54in
1,377mm54in
Wheelbase
2,780mm109in
2,781mm109in
Front track
1,558mm61in
1,567mm62in
Rear track
1,598mm63in
1,584mm62in
Trunk volume-
300L
Max trunk volume
450L
350L
Doors
2
2
Seats
4
4
Fuel tank
70L
70L
CO2 emissions
306g/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.

Alpina B6 Cabrio (E64) 4.4 V8BMW M6 Convertible (E64) 5.0 V10PowerTorque
  • Alpina B6 Cabrio (E64) 4.4 V8: Power / Torque
  • BMW M6 Convertible (E64) 5.0 V10: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
AlpinaB6 Cabrio (E64)4.4 V85,500 rpm4,250 rpm5,750 rpm
BMWM6 Convertible (E64)5.0 V107,750 rpm6,100 rpm8,250 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricAlpinaB6 Cabrio (E64)4.4 V8BMWM6 Convertible (E64)5.0 V10
Acceleration checkpoints
0-60 mph
0-97 km/h
4.7 s
4.6 s
0-100 km/h
0-62 mph
4.9 s
4.8 s
0-200 km/h
0-124 mph
14.6 s
17.0 s
Top speed
Unrestricted
320 km/h199 mph
Restricted
310 km/h193 mph
Likely limited
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Limited
Drag race simulation
60 ft
18 m
2.2 s
2.1 s
330 ft
101 m
5.7 s
5.6 s
1/8 mile
201 m
8.5 s
8.4 s
1000 ft
305 m
10.9 s
10.9 s
1/4 mile
402 m
12.8 s
12.9 s
Trap speed
1/4 mile
402 m
187 km/h
116 mph
178 km/h
111 mph

Power comparison

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

Chart data table
VehicleValue
AlpinaB6 Cabrio (E64)4.4 V8
500 hp
373 kW
BMWM6 Convertible (E64)5.0 V10
507 hp
378 kW

BMW M6 Convertible (E64) 5.0 V10 has 7 hp more than Alpina B6 Cabrio (E64) 4.4 V8.

The biggest power difference is between Alpina B6 Cabrio (E64) 4.4 V8 and BMW M6 Convertible (E64) 5.0 V10: 7 hp (5 kW).

Torque comparison

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

Chart data table
VehicleValue
AlpinaB6 Cabrio (E64)4.4 V8
700 Nm
516 lb-ft
BMWM6 Convertible (E64)5.0 V10
520 Nm
384 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
AlpinaB6 Cabrio (E64)4.4 V8
1,930 kg
4,255 lb
BMWM6 Convertible (E64)5.0 V10
1,930 kg
4,255 lb

Top speed without limiter comparison

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

Chart data table
VehicleValue
AlpinaB6 Cabrio (E64)4.4 V8
Unrestricted
320 km/h199 mph
Restricted
310 km/h193 mph
BMWM6 Convertible (E64)5.0 V10
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
AlpinaB6 Cabrio (E64)4.4 V84.9 s
BMWM6 Convertible (E64)5.0 V104.8 s

The biggest 0-100 km/h difference is between BMW M6 Convertible (E64) 5.0 V10 and Alpina B6 Cabrio (E64) 4.4 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
AlpinaB6 Cabrio (E64)4.4 V8
12.8 L/100 km
18.4 mpg US
22.1 mpg UK
BMWM6 Convertible (E64)5.0 V10
15.2 L/100 km
15.5 mpg US
18.6 mpg UK

The biggest fuel consumption difference is between Alpina B6 Cabrio (E64) 4.4 V8 and BMW M6 Convertible (E64) 5.0 V10: 2.4 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
AlpinaB6 Cabrio (E64)4.4 V8
259 hp/t
193 kW/t
3.9 kg/hp
BMWM6 Convertible (E64)5.0 V10
263 hp/t
196 kW/t
3.8 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
AlpinaB6 Cabrio (E64)4.4 V8
547 km
340 mi
BMWM6 Convertible (E64)5.0 V10
461 km
286 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
AlpinaB6 Cabrio (E64)4.4 V8
500 hp
373 kW
4.9 s
Unrestricted
320 km/h199 mph
Restricted
310 km/h193 mph
BMWM6 Convertible (E64)5.0 V10
507 hp
378 kW
4.8 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
AlpinaB6 Cabrio (E64)4.4 V8
Power
500 hp
373 kW
0-100 km/h4.9 s
Top speed
Unrestricted
320 km/h199 mph
Restricted
310 km/h193 mph
Doors/seats
2 doors
4 seats
Trunk
450 L
15.9 cu ft
Length
4,820 mm
189.8 in
Height
1,371 mm
54.0 in
BMWM6 Convertible (E64)5.0 V10
Power
507 hp
378 kW
0-100 km/h4.8 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Doors/seats
2 doors
4 seats
Trunk
300 L
10.6 cu ft
Length
4,871 mm
191.8 in
Height
1,377 mm
54.2 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
AlpinaB6 Cabrio (E64)4.4 V8
Power
500 hp
373 kW
0-100 km/h4.9 s
Top speed
Unrestricted
320 km/h199 mph
Restricted
310 km/h193 mph
12.8 L/100 km
18.4 mpg US
22.1 mpg UK
BMWM6 Convertible (E64)5.0 V10
Power
507 hp
378 kW
0-100 km/h4.8 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
15.2 L/100 km
15.5 mpg US
18.6 mpg UK

Alpina B6 Cabrio (E64) 4.4 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
AlpinaB6 Cabrio (E64)4.4 V8
12.8 L/100 km
18.4 mpg US
22.1 mpg UK
4.9 s
BMWM6 Convertible (E64)5.0 V10
15.2 L/100 km
15.5 mpg US
18.6 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
AlpinaB6 Cabrio (E64)4.4 V8
259 hp/t
193 kW/t
3.9 kg/hp
12.8 L/100 km
18.4 mpg US
22.1 mpg UK
BMWM6 Convertible (E64)5.0 V10
263 hp/t
196 kW/t
3.8 kg/hp
15.2 L/100 km
15.5 mpg US
18.6 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleAlpinaB6 Cabrio (E64)4.4 V8BMWM6 Convertible (E64)5.0 V10
Power
500 hp
373 kW
507 hp
378 kW
Torque
700 Nm
516 lb-ft
520 Nm
384 lb-ft
Acceleration
4.9 s
4.8 s
Top speed
Unrestricted
320 km/h199 mph
Restricted
310 km/h193 mph
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Lightness
1,930 kg
4,255 lb
1,930 kg
4,255 lb
Fuel consumption
12.8 L/100 km
18.4 mpg US
22.1 mpg UK
15.2 L/100 km
15.5 mpg US
18.6 mpg UK
Practicality
Doors/seats
2 doors
4 seats
Trunk
450 L
15.9 cu ft
Length
4,820 mm
189.8 in
Height
1,371 mm
54.0 in
Doors/seats
2 doors
4 seats
Trunk
300 L
10.6 cu ft
Length
4,871 mm
191.8 in
Height
1,377 mm
54.2 in
Range score
547 km
340 mi
461 km
286 mi
CO2 score
306 g/km
-
Trunk score
450 L
15.9 cu ft
300 L
10.6 cu ft
Power-to-weight score
259 hp/t
193 kW/t
3.9 kg/hp
263 hp/t
196 kW/t
3.8 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
VehicleAlpina B6 Cabrio (E64) 4.4 V8BMW M6 Convertible (E64) 5.0 V10
Consumption12.8 L/100 km18.4 mpg US22.1 mpg UK15.2 L/100 km15.5 mpg US18.6 mpg UK
Cost / 100 km22.40 LC100 km26.60 LC100 km
Cost / 100 mi36.05 LC100 mi42.81 LC100 mi
Annual fuel used1,920 L507 US gal422 UK gal2,280 L602 US gal502 UK gal
Annual fuel cost3,360 LC/year3,990 LC/year

Head-to-head comparisons

Alpina B6 Cabrio (E64) 4.4 V8

  • Has 180 Nm more
  • Has 60 km/h (37 mph) higher top speed
  • Uses 2.4 L/100 km less fuel
  • Has 86 km (54 mi) more estimated range
  • Has 150 L more trunk volume

Pros

  • Highest top speed
  • Highest torque
  • Lightest
  • Lowest combined fuel consumption
  • Best estimated range
  • Largest trunk

Cons

  • Slowest 0-100 km/h
  • Lowest power

BMW M6 Convertible (E64) 5.0 V10

  • Has 7 hp more
  • Is 0.1 s quicker from 0-100 km/h
  • Has 4 hp/t better power-to-weight

Pros

  • Quickest 0-100 km/h in this comparison
  • Most powerful
  • Best power-to-weight ratio

Cons

  • Highest combined fuel consumption
  • Lowest top speed
  • Smallest trunk

Choose cars to compare

Brand
Model
Generation
Engine or modification
Alpina B6 Cabrio (E64) 4.4 V8
BMW M6 Convertible (E64) 5.0 V10
Compare selected cars
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