Car comparison

BMW 6 Series (E63) · Facelift 2007 650ivsBMW 6 Series (E63) 645Ci

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

New comparison

BMW 6 Series (E63) · Facelift 2007

650i

367 hp4799 ccGasolineRWDManualNaturally aspiratedCoupe2007-2010
VS

BMW 6 Series (E63)

645Ci

333 hp4398 ccGasolineRWDAutomaticNaturally aspiratedCoupe2003-2005

Comparison overview

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

Best choices

BMW 6 Series (E63) Facelift 2007 650i

  • Quickest 0-100 km/h
    5.1 s
  • Fastest top speed
    265 km/h
    165 mph Unrestricted
    250 km/h
    155 mph Restricted
  • Most powerful
    367 hp
    274 kW
  • Highest torque
    490 Nm
    361 lb-ft
  • Lightest
    1,650 kg
    3,638 lb
  • Best power-to-weight
    222 hp/t
    166 kW/t
    4.5 kg/hp
  • Largest trunk
    450 L
  • Best overall score
    66/100
  • Best performance score
    72/100
  • Best practicality score
    53/100

BMW 6 Series (E63) 645Ci

  • Lowest combined fuel consumption
    10.9 L/100 km
    21.6 mpg US
    25.9 mpg UK
  • Lowest city consumption
    16.1 L/100 km
    14.6 mpg US
    17.5 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
  • Best economy score
    78/100

Specification comparison

Specification comparison
ModelBMW6 Series (E63)Facelift 2007650iBMW6 Series (E63)645Ci
Power
367hp274kW
333hp248kW
Torque
490Nm361lb-ft
450Nm332lb-ft
Curb weight
1,650kg3,638lb
1,695kg3,737lb
Gross weight
2,100kg4,630lb
2,065kg4,553lb
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Calculated
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Calculated
To 99% top speed
68.1s99% target: 262 km/h / 163 mph
Calculated
79.6s99% target: 262 km/h / 163 mph
Calculated
0-100 km/h
5.1s
5.8s
0-200 km/h
17.6s
Calculated
20.3s
Calculated
0-60 mph
4.9s
Calculated
5.5s
Calculated
Fuel consumption
11.7L/100 km20.1mpg US24.1mpg UK
10.9L/100 km21.6mpg US25.9mpg UK
Fuel consumption city
17.8L/100 km13.2mpg US15.9mpg UK
16.1L/100 km14.6mpg US17.5mpg UK
Fuel consumption highway
8.1L/100 km29mpg US34.9mpg UK
8L/100 km29.4mpg US35.3mpg UK
Quarter mile
13.2s
Calculated
13.9s
Calculated
Power-to-weight
222hp/t166kW/t101hp/1000 lb
Calculated
196hp/t147kW/t89hp/1000 lb
Calculated
Torque-to-weight
297Nm/t199lb-ft/ton
Calculated
265Nm/t178lb-ft/ton
Calculated
Estimated range
598km372mi
Calculated
642km399mi
Calculated
Displacement
4,799cc293cu in
4,398cc268cu in
Length
4,820mm190in
4,820mm190in
Width
1,855mm73in
1,855mm73in
Height
1,374mm54in
1,373mm54in
Wheelbase
2,780mm109in
2,780mm109in
Front track
1,558mm61in
1,558mm61in
Rear track
1,596mm63in
1,592mm63in
Trunk volume
450L
450L
Doors
2
2
Seats
4
4
Fuel tank
70L
70L
CO2 emissions
279g/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) Facelift 2007 650iBMW 6 Series (E63) 645CiPowerTorque
  • BMW 6 Series (E63) Facelift 2007 650i: Power / Torque
  • BMW 6 Series (E63) 645Ci: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
BMW6 Series (E63)Facelift 2007650i6,300 rpm3,400 rpm6,550 rpm
BMW6 Series (E63)645Ci6,100 rpm3,600 rpm6,350 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricBMW6 Series (E63)Facelift 2007650iBMW6 Series (E63)645Ci
Acceleration checkpoints
0-60 mph
0-97 km/h
4.9 s
5.5 s
0-100 km/h
0-62 mph
5.1 s
5.8 s
0-200 km/h
0-124 mph
17.6 s
20.3 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Likely limited
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Likely limited
Drag race simulation
60 ft
18 m
2.2 s
2.3 s
330 ft
101 m
5.8 s
6.1 s
1/8 mile
201 m
8.7 s
9.1 s
1000 ft
305 m
11.1 s
11.7 s
1/4 mile
402 m
13.2 s
13.9 s
Trap speed
1/4 mile
402 m
176 km/h
109 mph
169 km/h
105 mph

Power comparison

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

Chart data table
VehicleValue
BMW6 Series (E63)Facelift 2007650i
367 hp
274 kW
BMW6 Series (E63)645Ci
333 hp
248 kW

BMW 6 Series (E63) Facelift 2007 650i has 34 hp more than BMW 6 Series (E63) 645Ci.

The biggest power difference is between BMW 6 Series (E63) 645Ci and BMW 6 Series (E63) Facelift 2007 650i: 34 hp (25 kW).

Torque comparison

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

Chart data table
VehicleValue
BMW6 Series (E63)Facelift 2007650i
490 Nm
361 lb-ft
BMW6 Series (E63)645Ci
450 Nm
332 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
BMW6 Series (E63)Facelift 2007650i
1,650 kg
3,638 lb
BMW6 Series (E63)645Ci
1,695 kg
3,737 lb

Top speed without limiter comparison

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

Chart data table
VehicleValue
BMW6 Series (E63)Facelift 2007650i
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
BMW6 Series (E63)645Ci
Unrestricted
265 km/h165 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
BMW6 Series (E63)Facelift 2007650i5.1 s
BMW6 Series (E63)645Ci5.8 s

The biggest 0-100 km/h difference is between BMW 6 Series (E63) Facelift 2007 650i and BMW 6 Series (E63) 645Ci: 0.7 s.

Fuel consumption comparison

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

Chart data table
VehicleValue
BMW6 Series (E63)Facelift 2007650i
11.7 L/100 km
20.1 mpg US
24.1 mpg UK
BMW6 Series (E63)645Ci
10.9 L/100 km
21.6 mpg US
25.9 mpg UK

The biggest fuel consumption difference is between BMW 6 Series (E63) 645Ci and BMW 6 Series (E63) Facelift 2007 650i: 0.8 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
BMW6 Series (E63)Facelift 2007650i
222 hp/t
166 kW/t
4.5 kg/hp
BMW6 Series (E63)645Ci
196 hp/t
147 kW/t
5.1 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
BMW6 Series (E63)Facelift 2007650i
598 km
372 mi
BMW6 Series (E63)645Ci
642 km
399 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
BMW6 Series (E63)Facelift 2007650i
367 hp
274 kW
5.1 s
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
BMW6 Series (E63)645Ci
333 hp
248 kW
5.8 s
Unrestricted
265 km/h165 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
BMW6 Series (E63)Facelift 2007650i
Power
367 hp
274 kW
0-100 km/h5.1 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
1,374 mm
54.1 in
BMW6 Series (E63)645Ci
Power
333 hp
248 kW
0-100 km/h5.8 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

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
BMW6 Series (E63)Facelift 2007650i
Power
367 hp
274 kW
0-100 km/h5.1 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
11.7 L/100 km
20.1 mpg US
24.1 mpg UK
BMW6 Series (E63)645Ci
Power
333 hp
248 kW
0-100 km/h5.8 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

BMW 6 Series (E63) Facelift 2007 650i 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
BMW6 Series (E63)Facelift 2007650i
11.7 L/100 km
20.1 mpg US
24.1 mpg UK
5.1 s
BMW6 Series (E63)645Ci
10.9 L/100 km
21.6 mpg US
25.9 mpg UK
5.8 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
BMW6 Series (E63)Facelift 2007650i
222 hp/t
166 kW/t
4.5 kg/hp
11.7 L/100 km
20.1 mpg US
24.1 mpg UK
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

Detailed score breakdown

Detailed score breakdown
VehicleBMW6 Series (E63)Facelift 2007650iBMW6 Series (E63)645Ci
Power
367 hp
274 kW
333 hp
248 kW
Torque
490 Nm
361 lb-ft
450 Nm
332 lb-ft
Acceleration
5.1 s
5.8 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Lightness
1,650 kg
3,638 lb
1,695 kg
3,737 lb
Fuel consumption
11.7 L/100 km
20.1 mpg US
24.1 mpg UK
10.9 L/100 km
21.6 mpg US
25.9 mpg UK
Practicality
Doors/seats
2 doors
4 seats
Trunk
450 L
15.9 cu ft
Length
4,820 mm
189.8 in
Height
1,374 mm
54.1 in
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
Range score
598 km
372 mi
642 km
399 mi
CO2 score
279 g/km
264 g/km
Trunk score
450 L
15.9 cu ft
450 L
15.9 cu ft
Power-to-weight score
222 hp/t
166 kW/t
4.5 kg/hp
196 hp/t
147 kW/t
5.1 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
VehicleBMW 6 Series (E63) Facelift 2007 650iBMW 6 Series (E63) 645Ci
Consumption11.7 L/100 km20.1 mpg US24.1 mpg UK10.9 L/100 km21.6 mpg US25.9 mpg UK
Cost / 100 km20.47 LC100 km19.08 LC100 km
Cost / 100 mi32.95 LC100 mi30.70 LC100 mi
Annual fuel used1,755 L464 US gal386 UK gal1,635 L432 US gal360 UK gal
Annual fuel cost3,071 LC/year2,861 LC/year

Head-to-head comparisons

BMW 6 Series (E63) Facelift 2007 650i

  • Has 34 hp more
  • Has 40 Nm more
  • Is 45 kg lighter
  • Is 0.7 s quicker from 0-100 km/h
  • Has 26 hp/t better power-to-weight

Pros

  • Quickest 0-100 km/h in this comparison
  • Highest top speed
  • Most powerful
  • Highest torque
  • Lightest
  • Best power-to-weight ratio
  • Largest trunk

Cons

  • Highest combined fuel consumption
  • Highest CO2 emissions

BMW 6 Series (E63) 645Ci

  • Uses 0.8 L/100 km less fuel
  • Has 44 km (27 mi) more estimated range
  • Emits 15 g/km less CO2

Pros

  • Lowest combined fuel consumption
  • Best estimated range

Cons

  • Slowest 0-100 km/h
  • Lowest power
  • Heaviest

Choose cars to compare

Brand
Model
Generation
Engine or modification
BMW 6 Series (E63) 650i
BMW 6 Series (E63) 645Ci
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BMW 6 Series (E63) · Facelift 2007 650i vs BMW 6 Series (E63) 645Ci - car comparison - FastVsFaster