Car comparison

BMW 6 Series Convertible (E64) 645CivsPanoz Esperante 4.6 i V8 32V

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

Panoz Esperante

4.6 i V8 32V

324 hp4601 ccGasolineRWDManualNaturally aspiratedCabriolet / convertible1999-2009

Comparison overview

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

BMW 6 Series Convertible (E64) 645Ci

Fastest top speed
260 km/h
162 mph Unrestricted
250 km/h
155 mph Restricted
Most powerful
333 hp
248 kW
Highest torque
450 Nm
332 lb-ft
Lowest highway consumption
9.6 L/100 km
24.5 mpg US
29.4 mpg UK
Best overall score
59/100
Best economy score
72/100
Best practicality score
45/100

Panoz Esperante 4.6 i V8 32V

Quickest 0-100 km/h
5.1 s
Lightest
1,450 kg
3,197 lb
Best power-to-weight
223 hp/t
167 kW/t
4.5 kg/hp
Lowest city consumption
13.8 L/100 km
17.0 mpg US
20.5 mpg UK
Best performance score
68/100

Specification comparison

Specification comparison
Model	BMW6 Series Convertible (E64)645Ci	PanozEsperante4.6 i V8 32V
Power	333hp248kW	324hp242kW
Torque	450Nm332lb-ft	427Nm315lb-ft
Curb weight	1,815kg4,001lb	1,450kg3,197lb
Gross weight	2,215kg4,883lb	-
Top speed	Unrestricted 260 km/h162 mph Restricted 250 km/h155 mph Calculated	249 km/h 155 mph
To 99% top speed	87.9s99% target: 257 km/h / 160 mph Calculated	61.9s99% target: 247 km/h / 153 mph Calculated
0-100 km/h	6.1s	5.1s
0-200 km/h	22.6s Calculated	18.9s Calculated
0-60 mph	5.8s Calculated	4.8s Calculated
Fuel consumption	12.9L/100 km18.2mpg US21.9mpg UK	-
Fuel consumption city	18.5L/100 km12.7mpg US15.3mpg UK	13.8L/100 km17mpg US20.5mpg UK
Fuel consumption highway	9.6L/100 km24.5mpg US29.4mpg UK	10.2L/100 km23.1mpg US27.7mpg UK
Quarter mile	14.2s Calculated	13.3s Calculated
Power-to-weight	183hp/t137kW/t83hp/1000 lb Calculated	223hp/t167kW/t101hp/1000 lb Calculated
Torque-to-weight	248Nm/t166lb-ft/ton Calculated	294Nm/t197lb-ft/ton Calculated
Estimated range	543km337mi Calculated	-
Displacement	4,398cc268cu in	4,601cc281cu in
Length	4,820mm190in	4,475mm176in
Width	1,855mm73in	1,860mm73in
Height	1,373mm54in	1,355mm53in
Wheelbase	2,780mm109in	2,715mm107in
Front track	1,558mm61in	1,545mm61in
Rear track	1,592mm63in	1,580mm62in
Trunk volume	300L	-
Max trunk volume	350L	-
Doors	2	2
Seats	4	2
Fuel tank	70L	58L

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) 645CiPanoz Esperante 4.6 i V8 32VPowerTorque

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
PanozEsperante4.6 i V8 32V	6,000 rpm	4,750 rpm	6,250 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
Metric	BMW6 Series Convertible (E64)645Ci	PanozEsperante4.6 i V8 32V
	Acceleration checkpoints
0-60 mph 0-97 km/h	5.8 s	4.8 s
0-100 km/h 0-62 mph	6.1 s	5.1 s
0-200 km/h 0-124 mph	22.6 s	18.9 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	5.8 s
1/8 mile 201 m	9.3 s	8.7 s
1000 ft 305 m	12.0 s	11.2 s
1/4 mile 402 m	14.2 s	13.3 s
Trap speed 1/4 mile 402 m	163 km/h 101 mph	173 km/h 108 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
PanozEsperante4.6 i V8 32V	324 hp 242 kW

BMW 6 Series Convertible (E64) 645Ci has 9 hp more than Panoz Esperante 4.6 i V8 32V.

The biggest power difference is between Panoz Esperante 4.6 i V8 32V and BMW 6 Series Convertible (E64) 645Ci: 9 hp (7 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
PanozEsperante4.6 i V8 32V	427 Nm 315 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
PanozEsperante4.6 i V8 32V	1,450 kg 3,197 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
PanozEsperante4.6 i V8 32V	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
PanozEsperante4.6 i V8 32V	5.1 s

Although BMW 6 Series Convertible (E64) 645Ci has more power, Panoz Esperante 4.6 i V8 32V is quicker from 0-100 km/h.

The biggest 0-100 km/h difference is between Panoz Esperante 4.6 i V8 32V and BMW 6 Series Convertible (E64) 645Ci: 1.0 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
PanozEsperante4.6 i V8 32V	223 hp/t 167 kW/t 4.5 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
PanozEsperante4.6 i V8 32V	324 hp 242 kW	5.1 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

PanozEsperante4.6 i V8 32V

Power	324 hp 242 kW
0-100 km/h	5.1 s
Top speed 249 km/h 155 mph

Doors/seats	2 doors 2 seats
Trunk	-
Length	4,475 mm 176.2 in
Height	1,355 mm 53.3 in

Detailed score breakdown

Vehicle

BMW6 Series Convertible (E64)645Ci

PanozEsperante4.6 i V8 32V

Power

333 hp

248 kW

324 hp

242 kW

Torque

450 Nm

332 lb-ft

427 Nm

315 lb-ft

Acceleration

6.1 s

5.1 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

1,450 kg

3,197 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 2 seats
Trunk	-
Length	4,475 mm 176.2 in
Height	1,355 mm 53.3 in

Range score

543 km

337 mi

Trunk score

300 L

10.6 cu ft

Power-to-weight score

183 hp/t

137 kW/t

5.5 kg/hp

223 hp/t

167 kW/t

4.5 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