Car comparison

BMW 6 Series Convertible (E64) 645CivsBMW 6 Series (E24) 633CSi

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

New comparison

BMW 6 Series Convertible (E64)

645Ci

333 hp4398 ccGasolineRWDAutomaticNaturally aspiratedCabriolet / convertible2003-2005
VS

BMW 6 Series (E24)

633CSi

200 hp3210 ccGasolineRWDManualNaturally aspiratedCoupe1976-1979

Comparison overview

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

Best choices

BMW 6 Series Convertible (E64) 645Ci

  • Quickest 0-100 km/h
    6.2 s
  • 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
  • Best power-to-weight
    183 hp/t
    136 kW/t
    5.5 kg/hp
  • Best overall score
    59/100
  • Best performance score
    65/100
  • Best economy score
    76/100

Specification comparison

Specification comparison
ModelBMW6 Series Convertible (E64)645CiBMW6 Series (E24)633CSi
Power
333hp248kW
200hp149kW
Torque
450Nm332lb-ft
284Nm209lb-ft
Curb weight
1,820kg4,012lb
1,470kg3,241lb
Gross weight
2,220kg4,894lb
1,830kg4,034lb
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Calculated
215 km/h
134 mph
To 99% top speed
87.8s99% target: 257 km/h / 160 mph
Calculated
94.4s99% target: 213 km/h / 132 mph
Calculated
0-100 km/h
6.2s
7.9s
0-200 km/h
22.8s
Calculated
47.8s
Calculated
0-60 mph
5.9s
Calculated
7.4s
Calculated
Fuel consumption
11.5L/100 km20.5mpg US24.6mpg UK
-
Fuel consumption city
16.8L/100 km14mpg US16.8mpg UK
-
Fuel consumption highway
8.5L/100 km27.7mpg US33.2mpg UK
-
Quarter mile
14.3s
Calculated
15.7s
Calculated
Power-to-weight
183hp/t136kW/t83hp/1000 lb
Calculated
136hp/t101kW/t62hp/1000 lb
Calculated
Torque-to-weight
247Nm/t165lb-ft/ton
Calculated
193Nm/t129lb-ft/ton
Calculated
Estimated range
609km378mi
Calculated
-
Displacement
4,398cc268cu in
3,210cc196cu in
Length
4,820mm190in
4,755mm187in
Width
1,855mm73in
1,725mm68in
Height
1,373mm54in
1,365mm54in
Wheelbase
2,780mm109in
2,626mm103in
Front track
1,558mm61in
1,422mm56in
Rear track
1,592mm63in
1,487mm59in
Trunk volume
300L
415L
Max trunk volume
350L
-
Doors
2
2
Seats
4
4
Fuel tank
70L
70L

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) 645CiBMW 6 Series (E24) 633CSiPowerTorque
  • BMW 6 Series Convertible (E64) 645Ci: Power / Torque
  • BMW 6 Series (E24) 633CSi: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
BMW6 Series Convertible (E64)645Ci6,100 rpm3,600 rpm6,350 rpm
BMW6 Series (E24)633CSi5,500 rpm4,250 rpm5,750 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricBMW6 Series Convertible (E64)645CiBMW6 Series (E24)633CSi
Acceleration checkpoints
0-60 mph
0-97 km/h
5.9 s
7.4 s
0-100 km/h
0-62 mph
6.2 s
7.9 s
0-200 km/h
0-124 mph
22.8 s
47.8 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Likely limited
215 km/h
134 mph
Drag race simulation
60 ft
18 m
2.4 s
2.5 s
330 ft
101 m
6.2 s
6.7 s
1/8 mile
201 m
9.3 s
10.2 s
1000 ft
305 m
12.0 s
13.2 s
1/4 mile
402 m
14.3 s
15.7 s
Trap speed
1/4 mile
402 m
163 km/h
101 mph
143 km/h
89 mph

Power comparison

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

Chart data table
VehicleValue
BMW6 Series Convertible (E64)645Ci
333 hp
248 kW
BMW6 Series (E24)633CSi
200 hp
149 kW

BMW 6 Series Convertible (E64) 645Ci has 133 hp more than BMW 6 Series (E24) 633CSi.

The biggest power difference is between BMW 6 Series (E24) 633CSi and BMW 6 Series Convertible (E64) 645Ci: 133 hp (99 kW).

Torque comparison

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

Chart data table
VehicleValue
BMW6 Series Convertible (E64)645Ci
450 Nm
332 lb-ft
BMW6 Series (E24)633CSi
284 Nm
209 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
BMW6 Series Convertible (E64)645Ci
1,820 kg
4,012 lb
BMW6 Series (E24)633CSi
1,470 kg
3,241 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 Convertible (E64)645Ci
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
BMW6 Series (E24)633CSi
215 km/h
134 mph

0-100 km/h comparison

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

Chart data table
VehicleValue
BMW6 Series Convertible (E64)645Ci6.2 s
BMW6 Series (E24)633CSi7.9 s

The biggest 0-100 km/h difference is between BMW 6 Series Convertible (E64) 645Ci and BMW 6 Series (E24) 633CSi: 1.7 s.

Power-to-weight comparison

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

Chart data table
VehicleValue
BMW6 Series Convertible (E64)645Ci
183 hp/t
136 kW/t
5.5 kg/hp
BMW6 Series (E24)633CSi
136 hp/t
101 kW/t
7.3 kg/hp

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
BMW6 Series Convertible (E64)645Ci
333 hp
248 kW
6.2 s
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
BMW6 Series (E24)633CSi
200 hp
149 kW
7.9 s
215 km/h
134 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 Convertible (E64)645Ci
Power
333 hp
248 kW
0-100 km/h6.2 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
BMW6 Series (E24)633CSi
Power
200 hp
149 kW
0-100 km/h7.9 s
Top speed
215 km/h
134 mph
Doors/seats
2 doors
4 seats
Trunk
415 L
14.7 cu ft
Length
4,755 mm
187.2 in
Height
1,365 mm
53.7 in

Detailed score breakdown

Detailed score breakdown
VehicleBMW6 Series Convertible (E64)645CiBMW6 Series (E24)633CSi
Power
333 hp
248 kW
200 hp
149 kW
Torque
450 Nm
332 lb-ft
284 Nm
209 lb-ft
Acceleration
6.2 s
7.9 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
215 km/h
134 mph
Lightness
1,820 kg
4,012 lb
1,470 kg
3,241 lb
Fuel consumption
11.5 L/100 km
20.5 mpg US
24.6 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
415 L
14.7 cu ft
Length
4,755 mm
187.2 in
Height
1,365 mm
53.7 in
Range score
609 km
378 mi
-
Trunk score
300 L
10.6 cu ft
415 L
14.7 cu ft
Power-to-weight score
183 hp/t
136 kW/t
5.5 kg/hp
136 hp/t
101 kW/t
7.4 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 Convertible (E64) 645Ci
Consumption11.5 L/100 km20.5 mpg US24.6 mpg UK
Cost / 100 km20.13 LC100 km
Cost / 100 mi32.39 LC100 mi
Annual fuel used1,725 L456 US gal379 UK gal
Annual fuel cost3,019 LC/year

Head-to-head comparisons

BMW 6 Series Convertible (E64) 645Ci

  • Has 133 hp more
  • Has 166 Nm more
  • Is 1.7 s quicker from 0-100 km/h
  • Has 45 km/h (28 mph) higher top speed
  • Has 47 hp/t better power-to-weight

Pros

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

Cons

  • Heaviest
  • Smallest trunk

BMW 6 Series (E24) 633CSi

  • Is 350 kg lighter
  • Has 115 L more trunk volume

Pros

  • Lightest
  • Largest trunk

Cons

  • Slowest 0-100 km/h
  • Lowest power
  • Lowest top speed

Choose cars to compare

Brand
Model
Generation
Engine or modification
BMW 6 Series Convertible (E64) 645Ci
BMW 6 Series (E24) 633CSi
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BMW 6 Series Convertible (E64) 645Ci vs BMW 6 Series (E24) 633CSi - car comparison - FastVsFaster