Car comparison

BMW 6 Series Convertible (E64) 645CivsBentley Azure 6.7 i V8

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

New comparison

BMW 6 Series Convertible (E64)

645Ci

333 hp4398 ccGasolineRWDManualNaturally aspiratedCabriolet / convertible2003-2005

Bentley Azure

6.7 i V8

426 hp6750 ccGasolineRWDAutomaticNaturally aspiratedCabriolet / convertible2000-2005

Comparison overview

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

BMW 6 Series Convertible (E64) 645Ci

Quickest 0-100 km/h
6.1 s
Fastest top speed
260 km/h
162 mph Unrestricted
250 km/h
155 mph Restricted
Lightest
1,815 kg
4,001 lb
Best power-to-weight
183 hp/t
137 kW/t
5.5 kg/hp
Largest trunk
300 L
Best economy score
72/100
Best practicality score
45/100

Bentley Azure 6.7 i V8

Most powerful
426 hp
318 kW
Highest torque
875 Nm
645 lb-ft
Best overall score
62/100
Best performance score
71/100

Specification comparison

Specification comparison
Model	BMW6 Series Convertible (E64)645Ci	BentleyAzure6.7 i V8
Power	333hp248kW	426hp318kW
Torque	450Nm332lb-ft	875Nm645lb-ft
Curb weight	1,815kg4,001lb	2,610kg5,754lb
Gross weight	2,215kg4,883lb	2,980kg6,570lb
Top speed	Unrestricted 260 km/h162 mph Restricted 250 km/h155 mph Calculated	249 km/h 155 mph
To 99% top speed	87.6s99% target: 257 km/h / 160 mph Calculated	97.3s99% target: 247 km/h / 153 mph Calculated
0-100 km/h	6.1s	6.2s
0-200 km/h	22.6s Calculated	26.3s Calculated
0-60 mph	5.8s Calculated	5.9s Calculated
Fuel consumption	12.9L/100 km18.2mpg US21.9mpg UK	-
Fuel consumption city	18.5L/100 km12.7mpg US15.3mpg UK	-
Fuel consumption highway	9.6L/100 km24.5mpg US29.4mpg UK	-
Quarter mile	14.2s Calculated	14.4s Calculated
Power-to-weight	183hp/t137kW/t83hp/1000 lb Calculated	163hp/t122kW/t74hp/1000 lb Calculated
Torque-to-weight	248Nm/t166lb-ft/ton Calculated	335Nm/t224lb-ft/ton Calculated
Estimated range	543km337mi Calculated	-
Displacement	4,398cc268cu in	6,750cc412cu in
Length	4,820mm190in	5,350mm211in
Width	1,855mm73in	1,878mm74in
Height	1,373mm54in	1,475mm58in
Wheelbase	2,780mm109in	3,061mm121in
Front track	1,558mm61in	1,549mm61in
Rear track	1,592mm63in	1,549mm61in
Trunk volume	300L	193L
Max trunk volume	350L	-
Doors	2	2
Seats	4	4
Fuel tank	70L	108L

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.

BMW 6 Series Convertible (E64) 645CiBentley Azure 6.7 i V8PowerTorque

Dyno simulation data table
Vehicle	Peak power RPM	Peak torque RPM	Max engine speed
BMW6 Series Convertible (E64)645Ci	6,100 rpm	3,600 rpm	6,350 rpm
BentleyAzure6.7 i V8	4,000 rpm	2,100 rpm	4,250 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
Metric	BMW6 Series Convertible (E64)645Ci	BentleyAzure6.7 i V8
	Acceleration checkpoints
0-60 mph 0-97 km/h	5.8 s	5.9 s
0-100 km/h 0-62 mph	6.1 s	6.2 s
0-200 km/h 0-124 mph	22.6 s	26.3 s
Top speed	Unrestricted 260 km/h162 mph Restricted 250 km/h155 mph Likely limited	249 km/h 155 mph
	Drag race simulation
60 ft 18 m	2.3 s	2.2 s
330 ft 101 m	6.2 s	6.1 s
1/8 mile 201 m	9.3 s	9.3 s
1000 ft 305 m	12.0 s	12.0 s
1/4 mile 402 m	14.2 s	14.4 s
Trap speed 1/4 mile 402 m	163 km/h 102 mph	158 km/h 98 mph

Power comparison

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

Chart data table
Vehicle	Value
BMW6 Series Convertible (E64)645Ci	333 hp 248 kW
BentleyAzure6.7 i V8	426 hp 318 kW

Bentley Azure 6.7 i V8 has 93 hp more than BMW 6 Series Convertible (E64) 645Ci.

The biggest power difference is between BMW 6 Series Convertible (E64) 645Ci and Bentley Azure 6.7 i V8: 93 hp (69 kW).

Torque comparison

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

Chart data table
Vehicle	Value
BMW6 Series Convertible (E64)645Ci	450 Nm 332 lb-ft
BentleyAzure6.7 i V8	875 Nm 645 lb-ft

Curb weight comparison

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

Chart data table
Vehicle	Value
BMW6 Series Convertible (E64)645Ci	1,815 kg 4,001 lb
BentleyAzure6.7 i V8	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
Vehicle	Value
BMW6 Series Convertible (E64)645Ci	Unrestricted 260 km/h162 mph Restricted 250 km/h155 mph
BentleyAzure6.7 i V8	249 km/h 155 mph

0-100 km/h comparison

Bar comparison chart for 0-100 km/h. Lower is better · seconds

Chart data table
Vehicle	Value
BMW6 Series Convertible (E64)645Ci	6.1 s
BentleyAzure6.7 i V8	6.2 s

Although Bentley Azure 6.7 i V8 has more power, BMW 6 Series Convertible (E64) 645Ci is quicker from 0-100 km/h.

The biggest 0-100 km/h difference is between BMW 6 Series Convertible (E64) 645Ci and Bentley Azure 6.7 i V8: 0.1 s.

Power-to-weight comparison

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

Chart data table
Vehicle	Value
BMW6 Series Convertible (E64)645Ci	183 hp/t 137 kW/t 5.5 kg/hp
BentleyAzure6.7 i V8	163 hp/t 122 kW/t 6.1 kg/hp

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
Vehicle	Power	Acceleration	Top speed
BMW6 Series Convertible (E64)645Ci	333 hp 248 kW	6.1 s	Unrestricted 260 km/h162 mph Restricted 250 km/h155 mph
BentleyAzure6.7 i V8	426 hp 318 kW	6.2 s	249 km/h 155 mph

Most attractive quadrant

Scatter chart with performance score on the X axis and practicality score on the Y axis.

Vehicle

Performance score

Practicality score

BMW6 Series Convertible (E64)645Ci

Power	333 hp 248 kW
0-100 km/h	6.1 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	4,820 mm 189.8 in
Height	1,373 mm 54.1 in

BentleyAzure6.7 i V8

Power	426 hp 318 kW
0-100 km/h	6.2 s
Top speed 249 km/h 155 mph

Doors/seats	2 doors 4 seats
Trunk	193 L 6.8 cu ft
Length	5,350 mm 210.6 in
Height	1,475 mm 58.1 in

Detailed score breakdown

Vehicle

BMW6 Series Convertible (E64)645Ci

BentleyAzure6.7 i V8

Power

333 hp

248 kW

426 hp

318 kW

Torque

450 Nm

332 lb-ft

875 Nm

645 lb-ft

Acceleration

6.1 s

6.2 s

Top speed

Unrestricted

260 km/h162 mph

Restricted

250 km/h155 mph

249 km/h

155 mph

Lightness

1,815 kg

4,001 lb

2,610 kg

5,754 lb

Fuel consumption

12.9 L/100 km

18.2 mpg US

21.9 mpg UK

Practicality

Doors/seats	2 doors 4 seats
Trunk	300 L 10.6 cu ft
Length	4,820 mm 189.8 in
Height	1,373 mm 54.1 in

Doors/seats	2 doors 4 seats
Trunk	193 L 6.8 cu ft
Length	5,350 mm 210.6 in
Height	1,475 mm 58.1 in

Range score

543 km

337 mi

Trunk score

300 L

10.6 cu ft

193 L

6.8 cu ft

Power-to-weight score

183 hp/t

137 kW/t

5.5 kg/hp

163 hp/t

122 kW/t

6.1 kg/hp

Overall

Fixed score

Fuel cost and annual usage

Estimate running costs from combined consumption, your annual distance, and the fuel price in your local currency.

Average annual distanceDistance unitFuel price in your local currencyPrice unit

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
Vehicle	BMW 6 Series Convertible (E64) 645Ci
Consumption	12.9 L/100 km18.2 mpg US21.9 mpg UK
Cost / 100 km	22.58 LC100 km
Cost / 100 mi	36.33 LC100 mi
Annual fuel used	1,935 L511 US gal426 UK gal
Annual fuel cost	3,386 LC/year