Car comparison

BMW 6 Series Convertible (E64) 645CivsTVR Chimaera 4.6

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

TVR Chimaera

4.6

288 hp4546 ccGasolineRWDManualNaturally aspiratedCabriolet / convertible1997-2003

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 combined fuel consumption
12.9 L/100 km
18.2 mpg US
21.9 mpg UK
Best estimated range
543 km
337 mi
Best overall score
59/100
Best economy score
72/100
Best practicality score
45/100

TVR Chimaera 4.6

Quickest 0-100 km/h
4.7 s
Lightest
1,060 kg
2,337 lb
Best power-to-weight
272 hp/t
203 kW/t
3.7 kg/hp
Largest trunk
310 L
Best performance score
69/100

Specification comparison

Specification comparison
Model	BMW6 Series Convertible (E64)645Ci	TVRChimaera4.6
Power	333hp248kW	288hp215kW
Torque	450Nm332lb-ft	407Nm300lb-ft
Curb weight	1,815kg4,001lb	1,060kg2,337lb
Gross weight	2,215kg4,883lb	1,280kg2,822lb
Top speed	Unrestricted 260 km/h162 mph Restricted 250 km/h155 mph Calculated	257 km/h 160 mph
To 99% top speed	87.6s99% target: 257 km/h / 160 mph Calculated	50.9s99% target: 254 km/h / 158 mph Calculated
0-100 km/h	6.1s	4.7s
0-200 km/h	22.6s Calculated	15.5s Calculated
0-60 mph	5.8s Calculated	4.5s Calculated
Fuel consumption	12.9L/100 km18.2mpg US21.9mpg UK	13.5L/100 km17.4mpg US20.9mpg 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	12.7s Calculated
Power-to-weight	183hp/t137kW/t83hp/1000 lb Calculated	272hp/t203kW/t123hp/1000 lb Calculated
Torque-to-weight	248Nm/t166lb-ft/ton Calculated	384Nm/t257lb-ft/ton Calculated
Estimated range	543km337mi Calculated	422km262mi Calculated
Displacement	4,398cc268cu in	4,546cc277cu in
Length	4,820mm190in	3,965mm156in
Width	1,855mm73in	1,730mm68in
Height	1,373mm54in	1,223mm48in
Wheelbase	2,780mm109in	2,282mm90in
Front track	1,558mm61in	1,460mm57in
Rear track	1,592mm63in	1,470mm58in
Trunk volume	300L	310L
Max trunk volume	350L	-
Doors	2	2
Seats	4	2
Fuel tank	70L	57L

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) 645CiTVR Chimaera 4.6PowerTorque

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
TVRChimaera4.6	5,500 rpm	4,500 rpm	5,750 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
Metric	BMW6 Series Convertible (E64)645Ci	TVRChimaera4.6
	Acceleration checkpoints
0-60 mph 0-97 km/h	5.8 s	4.5 s
0-100 km/h 0-62 mph	6.1 s	4.7 s
0-200 km/h 0-124 mph	22.6 s	15.5 s
Top speed	Unrestricted 260 km/h162 mph Restricted 250 km/h155 mph Likely limited	257 km/h 160 mph
	Drag race simulation
60 ft 18 m	2.3 s	2.2 s
330 ft 101 m	6.2 s	5.6 s
1/8 mile 201 m	9.3 s	8.4 s
1000 ft 305 m	12.0 s	10.8 s
1/4 mile 402 m	14.2 s	12.7 s
Trap speed 1/4 mile 402 m	163 km/h 102 mph	184 km/h 114 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
TVRChimaera4.6	288 hp 215 kW

BMW 6 Series Convertible (E64) 645Ci has 45 hp more than TVR Chimaera 4.6.

The biggest power difference is between TVR Chimaera 4.6 and BMW 6 Series Convertible (E64) 645Ci: 45 hp (34 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
TVRChimaera4.6	407 Nm 300 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
TVRChimaera4.6	1,060 kg 2,337 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
TVRChimaera4.6	257 km/h 160 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
TVRChimaera4.6	4.7 s

Although BMW 6 Series Convertible (E64) 645Ci has more power, TVR Chimaera 4.6 is quicker from 0-100 km/h.

The biggest 0-100 km/h difference is between TVR Chimaera 4.6 and BMW 6 Series Convertible (E64) 645Ci: 1.4 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 Convertible (E64)645Ci	12.9 L/100 km 18.2 mpg US 21.9 mpg UK
TVRChimaera4.6	13.5 L/100 km 17.4 mpg US 20.9 mpg UK

The biggest fuel consumption difference is between BMW 6 Series Convertible (E64) 645Ci and TVR Chimaera 4.6: 0.6 L/100 km.

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
TVRChimaera4.6	272 hp/t 203 kW/t 3.7 kg/hp

Estimated range comparison

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

Chart data table
Vehicle	Value
BMW6 Series Convertible (E64)645Ci	543 km 337 mi
TVRChimaera4.6	422 km 262 mi

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
TVRChimaera4.6	288 hp 215 kW	4.7 s	257 km/h 160 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

TVRChimaera4.6

Power	288 hp 215 kW
0-100 km/h	4.7 s
Top speed 257 km/h 160 mph

Doors/seats	2 doors 2 seats
Trunk	310 L 10.9 cu ft
Length	3,965 mm 156.1 in
Height	1,223 mm 48.1 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 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

12.9 L/100 km

18.2 mpg US

21.9 mpg UK

TVRChimaera4.6

Power	288 hp 215 kW
0-100 km/h	4.7 s
Top speed 257 km/h 160 mph

13.5 L/100 km

17.4 mpg US

20.9 mpg UK

TVR Chimaera 4.6 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 Convertible (E64)645Ci	12.9 L/100 km 18.2 mpg US 21.9 mpg UK	6.1 s
TVRChimaera4.6	13.5 L/100 km 17.4 mpg US 20.9 mpg UK	4.7 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 Convertible (E64)645Ci	183 hp/t 137 kW/t 5.5 kg/hp	12.9 L/100 km 18.2 mpg US 21.9 mpg UK
TVRChimaera4.6	272 hp/t 203 kW/t 3.7 kg/hp	13.5 L/100 km 17.4 mpg US 20.9 mpg UK

Detailed score breakdown

Vehicle

BMW6 Series Convertible (E64)645Ci

TVRChimaera4.6

Power

333 hp

248 kW

288 hp

215 kW

Torque

450 Nm

332 lb-ft

407 Nm

300 lb-ft

Acceleration

6.1 s

4.7 s

Top speed

Unrestricted

260 km/h162 mph

Restricted

250 km/h155 mph

257 km/h

160 mph

Lightness

1,815 kg

4,001 lb

1,060 kg

2,337 lb

Fuel consumption

12.9 L/100 km

18.2 mpg US

21.9 mpg UK

13.5 L/100 km

17.4 mpg US

20.9 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	310 L 10.9 cu ft
Length	3,965 mm 156.1 in
Height	1,223 mm 48.1 in

Range score

543 km

337 mi

422 km

262 mi

Trunk score

300 L

10.6 cu ft

310 L

10.9 cu ft

Power-to-weight score

183 hp/t

137 kW/t

5.5 kg/hp

272 hp/t

203 kW/t

3.7 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	TVR Chimaera 4.6
Consumption	12.9 L/100 km18.2 mpg US21.9 mpg UK	13.5 L/100 km17.4 mpg US20.9 mpg UK
Cost / 100 km	22.58 LC100 km	23.63 LC100 km
Cost / 100 mi	36.33 LC100 mi	38.02 LC100 mi
Annual fuel used	1,935 L511 US gal426 UK gal	2,025 L535 US gal445 UK gal
Annual fuel cost	3,386 LC/year	3,544 LC/year