Car comparison

BMW 6 Series (E63) 645CivsChrysler Crossfire SRT-6 3.2i V6

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

New comparison

BMW 6 Series (E63)

645Ci

333 hp4398 ccGasolineRWDAutomaticNaturally aspiratedCoupe2003-2005

Chrysler Crossfire

SRT-6 3.2i V6

330 hp3199 ccGasolineRWDAutomaticSuperchargedCoupe2004-2006

Comparison overview

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

BMW 6 Series (E63) 645Ci

Fastest top speed
265 km/h
165 mph Unrestricted
250 km/h
155 mph Restricted
Most powerful
333 hp
248 kW
Highest torque
450 Nm
332 lb-ft
Lowest combined fuel consumption
10.9 L/100 km
21.6 mpg US
25.9 mpg UK
Lowest highway consumption
8.0 L/100 km
29.4 mpg US
35.3 mpg UK
Lowest CO2 emissions
264 g/km
Best estimated range
642 km
399 mi
Largest trunk
450 L
Best overall score
63/100
Best performance score
68/100
Best economy score
78/100
Best practicality score
53/100

Chrysler Crossfire SRT-6 3.2i V6

Quickest 0-100 km/h
5.3 s
Lightest
1,455 kg
3,208 lb
Best power-to-weight
227 hp/t
169 kW/t
4.4 kg/hp
Lowest city consumption
15.9 L/100 km
14.8 mpg US
17.8 mpg UK

Specification comparison

Specification comparison
Model	BMW6 Series (E63)645Ci	ChryslerCrossfireSRT-6 3.2i V6
Power	333hp248kW	330hp246kW
Torque	450Nm332lb-ft	420Nm310lb-ft
Curb weight	1,695kg3,737lb	1,455kg3,208lb
Gross weight	2,065kg4,553lb	1,755kg3,869lb
Top speed	Unrestricted 265 km/h165 mph Restricted 250 km/h155 mph Calculated	255 km/h 158 mph
To 99% top speed	79.6s99% target: 262 km/h / 163 mph Calculated	63.4s99% target: 252 km/h / 157 mph Calculated
0-100 km/h	5.8s	5.3s
0-200 km/h	20.3s Calculated	18.6s Calculated
0-60 mph	5.5s Calculated	5.0s Calculated
Fuel consumption	10.9L/100 km21.6mpg US25.9mpg UK	11L/100 km21.4mpg US25.7mpg UK
Fuel consumption city	16.1L/100 km14.6mpg US17.5mpg UK	15.9L/100 km14.8mpg US17.8mpg UK
Fuel consumption highway	8L/100 km29.4mpg US35.3mpg UK	8.2L/100 km28.7mpg US34.4mpg UK
Quarter mile	13.9s Calculated	13.4s Calculated
Power-to-weight	196hp/t147kW/t89hp/1000 lb Calculated	227hp/t169kW/t103hp/1000 lb Calculated
Torque-to-weight	265Nm/t178lb-ft/ton Calculated	289Nm/t193lb-ft/ton Calculated
Estimated range	642km399mi Calculated	545km339mi Calculated
Displacement	4,398cc268cu in	3,199cc195cu in
Length	4,820mm190in	4,058mm160in
Width	1,855mm73in	1,766mm70in
Height	1,373mm54in	1,296mm51in
Wheelbase	2,780mm109in	2,400mm94in
Front track	1,558mm61in	1,493mm59in
Rear track	1,592mm63in	1,502mm59in
Trunk volume	450L	215L
Doors	2	2
Seats	4	2
Fuel tank	70L	60L
CO2 emissions	264g/km	264g/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.

BMW 6 Series (E63) 645CiChrysler Crossfire SRT-6 3.2i V6PowerTorque

Dyno simulation data table
Vehicle	Peak power RPM	Peak torque RPM	Max engine speed
BMW6 Series (E63)645Ci	6,100 rpm	3,600 rpm	6,350 rpm
ChryslerCrossfireSRT-6 3.2i V6	6,100 rpm	3,500 rpm	6,350 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
Metric	BMW6 Series (E63)645Ci	ChryslerCrossfireSRT-6 3.2i V6
	Acceleration checkpoints
0-60 mph 0-97 km/h	5.5 s	5.0 s
0-100 km/h 0-62 mph	5.8 s	5.3 s
0-200 km/h 0-124 mph	20.3 s	18.6 s
Top speed	Unrestricted 265 km/h165 mph Restricted 250 km/h155 mph Likely limited	255 km/h 158 mph
	Drag race simulation
60 ft 18 m	2.3 s	2.3 s
330 ft 101 m	6.1 s	5.9 s
1/8 mile 201 m	9.1 s	8.8 s
1000 ft 305 m	11.7 s	11.3 s
1/4 mile 402 m	13.9 s	13.4 s
Trap speed 1/4 mile 402 m	169 km/h 105 mph	174 km/h 108 mph

Power comparison

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

Chart data table
Vehicle	Value
BMW6 Series (E63)645Ci	333 hp 248 kW
ChryslerCrossfireSRT-6 3.2i V6	330 hp 246 kW

BMW 6 Series (E63) 645Ci has 3 hp more than Chrysler Crossfire SRT-6 3.2i V6.

The biggest power difference is between Chrysler Crossfire SRT-6 3.2i V6 and BMW 6 Series (E63) 645Ci: 3 hp (2 kW).

Torque comparison

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

Chart data table
Vehicle	Value
BMW6 Series (E63)645Ci	450 Nm 332 lb-ft
ChryslerCrossfireSRT-6 3.2i V6	420 Nm 310 lb-ft

Curb weight comparison

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

Chart data table
Vehicle	Value
BMW6 Series (E63)645Ci	1,695 kg 3,737 lb
ChryslerCrossfireSRT-6 3.2i V6	1,455 kg 3,208 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 (E63)645Ci	Unrestricted 265 km/h165 mph Restricted 250 km/h155 mph
ChryslerCrossfireSRT-6 3.2i V6	255 km/h 158 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 (E63)645Ci	5.8 s
ChryslerCrossfireSRT-6 3.2i V6	5.3 s

Although BMW 6 Series (E63) 645Ci has more power, Chrysler Crossfire SRT-6 3.2i V6 is quicker from 0-100 km/h.

The biggest 0-100 km/h difference is between Chrysler Crossfire SRT-6 3.2i V6 and BMW 6 Series (E63) 645Ci: 0.5 s.

Fuel consumption comparison

Bar comparison chart for Fuel consumption. Lower is better · L/100 km / mpg US / mpg UK

Chart data table
Vehicle	Value
BMW6 Series (E63)645Ci	10.9 L/100 km 21.6 mpg US 25.9 mpg UK
ChryslerCrossfireSRT-6 3.2i V6	11.0 L/100 km 21.4 mpg US 25.7 mpg UK

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 (E63)645Ci	196 hp/t 147 kW/t 5.1 kg/hp
ChryslerCrossfireSRT-6 3.2i V6	227 hp/t 169 kW/t 4.4 kg/hp

Estimated range comparison

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

Chart data table
Vehicle	Value
BMW6 Series (E63)645Ci	642 km 399 mi
ChryslerCrossfireSRT-6 3.2i V6	545 km 339 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
Vehicle	Power	Acceleration	Top speed
BMW6 Series (E63)645Ci	333 hp 248 kW	5.8 s	Unrestricted 265 km/h165 mph Restricted 250 km/h155 mph
ChryslerCrossfireSRT-6 3.2i V6	330 hp 246 kW	5.3 s	255 km/h 158 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 (E63)645Ci

Power	333 hp 248 kW
0-100 km/h	5.8 s
Top speed Unrestricted 265 km/h165 mph Restricted 250 km/h155 mph

Doors/seats	2 doors 4 seats
Trunk	450 L 15.9 cu ft
Length	4,820 mm 189.8 in
Height	1,373 mm 54.1 in

ChryslerCrossfireSRT-6 3.2i V6

Power	330 hp 246 kW
0-100 km/h	5.3 s
Top speed 255 km/h 158 mph

Doors/seats	2 doors 2 seats
Trunk	215 L 7.6 cu ft
Length	4,058 mm 159.8 in
Height	1,296 mm 51.0 in

Performance vs fuel economy

Cars closer to the top-right corner combine stronger performance with better fuel economy scores.

Vehicle

Performance score

Fuel economy score

BMW6 Series (E63)645Ci

Power	333 hp 248 kW
0-100 km/h	5.8 s
Top speed Unrestricted 265 km/h165 mph Restricted 250 km/h155 mph

10.9 L/100 km

21.6 mpg US

25.9 mpg UK

ChryslerCrossfireSRT-6 3.2i V6

Power	330 hp 246 kW
0-100 km/h	5.3 s
Top speed 255 km/h 158 mph

11.0 L/100 km

21.4 mpg US

25.7 mpg UK

BMW 6 Series (E63) 645Ci 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
Vehicle	Fuel consumption, L/100 km	0-100 km/h, s
BMW6 Series (E63)645Ci	10.9 L/100 km 21.6 mpg US 25.9 mpg UK	5.8 s
ChryslerCrossfireSRT-6 3.2i V6	11.0 L/100 km 21.4 mpg US 25.7 mpg UK	5.3 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
Vehicle	Power-to-weight, hp/t	Fuel consumption, L/100 km
BMW6 Series (E63)645Ci	196 hp/t 147 kW/t 5.1 kg/hp	10.9 L/100 km 21.6 mpg US 25.9 mpg UK
ChryslerCrossfireSRT-6 3.2i V6	227 hp/t 169 kW/t 4.4 kg/hp	11.0 L/100 km 21.4 mpg US 25.7 mpg UK

Detailed score breakdown

Vehicle

BMW6 Series (E63)645Ci

ChryslerCrossfireSRT-6 3.2i V6

Power

333 hp

248 kW

330 hp

246 kW

Torque

450 Nm

332 lb-ft

420 Nm

310 lb-ft

Acceleration

5.8 s

5.3 s

Top speed

Unrestricted

265 km/h165 mph

Restricted

250 km/h155 mph

255 km/h

158 mph

Lightness

1,695 kg

3,737 lb

1,455 kg

3,208 lb

Fuel consumption

10.9 L/100 km

21.6 mpg US

25.9 mpg UK

11.0 L/100 km

21.4 mpg US

25.7 mpg UK

Practicality

Doors/seats	2 doors 4 seats
Trunk	450 L 15.9 cu ft
Length	4,820 mm 189.8 in
Height	1,373 mm 54.1 in

Doors/seats	2 doors 2 seats
Trunk	215 L 7.6 cu ft
Length	4,058 mm 159.8 in
Height	1,296 mm 51.0 in

Range score

642 km

399 mi

545 km

339 mi

CO2 score

264 g/km

Trunk score

450 L

15.9 cu ft

215 L

7.6 cu ft

Power-to-weight score

196 hp/t

147 kW/t

5.1 kg/hp

227 hp/t

169 kW/t

4.4 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 (E63) 645Ci	Chrysler Crossfire SRT-6 3.2i V6
Consumption	10.9 L/100 km21.6 mpg US25.9 mpg UK	11 L/100 km21.4 mpg US25.7 mpg UK
Cost / 100 km	19.08 LC100 km	19.25 LC100 km
Cost / 100 mi	30.70 LC100 mi	30.98 LC100 mi
Annual fuel used	1,635 L432 US gal360 UK gal	1,650 L436 US gal363 UK gal
Annual fuel cost	2,861 LC/year	2,888 LC/year