Car comparison

BMW 3 Series Convertible (E93) 335ivsBMW 6 Series Convertible (E64) 645Ci

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

New comparison

BMW 3 Series Convertible (E93)

335i

306 hp2979 ccGasolineRWDManualTwin-turboCabriolet / convertible2007-2010
VS

BMW 6 Series Convertible (E64)

645Ci

333 hp4398 ccGasolineRWDAutomaticNaturally aspiratedCabriolet / convertible2003-2005

Comparison overview

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

Best choices

BMW 3 Series Convertible (E93) 335i

  • Quickest 0-100 km/h
    5.8 s
  • Fastest top speed
    260 km/h
    162 mph Unrestricted
    250 km/h
    155 mph Restricted
  • Lightest
    1,735 kg
    3,825 lb
  • Lowest combined fuel consumption
    9.5 L/100 km
    24.8 mpg US
    29.7 mpg UK
  • Lowest city consumption
    13.6 L/100 km
    17.3 mpg US
    20.8 mpg UK
  • Lowest highway consumption
    7.1 L/100 km
    33.1 mpg US
    39.8 mpg UK
  • Best estimated range
    663 km
    412 mi
  • Best economy score
    81/100

BMW 6 Series Convertible (E64) 645Ci

  • 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
  • Largest trunk
    300 L
  • Best overall score
    59/100
  • Best performance score
    65/100
  • Best practicality score
    45/100

Specification comparison

Specification comparison
ModelBMW3 Series Convertible (E93)335iBMW6 Series Convertible (E64)645Ci
Power
306hp228kW
333hp248kW
Torque
400Nm295lb-ft
450Nm332lb-ft
Curb weight
1,735kg3,825lb
1,820kg4,012lb
Gross weight
2,165kg4,773lb
2,220kg4,894lb
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Calculated
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Calculated
To 99% top speed
81.3s99% target: 257 km/h / 160 mph
Calculated
87.8s99% target: 257 km/h / 160 mph
Calculated
0-100 km/h
5.8s
6.2s
0-200 km/h
21.2s
Calculated
22.8s
Calculated
0-60 mph
5.5s
Calculated
5.9s
Calculated
Fuel consumption
9.5L/100 km24.8mpg US29.7mpg UK
11.5L/100 km20.5mpg US24.6mpg UK
Fuel consumption city
13.6L/100 km17.3mpg US20.8mpg UK
16.8L/100 km14mpg US16.8mpg UK
Fuel consumption highway
7.1L/100 km33.1mpg US39.8mpg UK
8.5L/100 km27.7mpg US33.2mpg UK
Quarter mile
13.9s
Calculated
14.3s
Calculated
Power-to-weight
176hp/t132kW/t80hp/1000 lb
Calculated
183hp/t136kW/t83hp/1000 lb
Calculated
Torque-to-weight
231Nm/t154lb-ft/ton
Calculated
247Nm/t165lb-ft/ton
Calculated
Estimated range
663km412mi
Calculated
609km378mi
Calculated
Displacement
2,979cc182cu in
4,398cc268cu in
Length
4,580mm180in
4,820mm190in
Width
1,782mm70in
1,855mm73in
Height
1,384mm54in
1,373mm54in
Wheelbase
2,760mm109in
2,780mm109in
Front track
1,500mm59in
1,558mm61in
Rear track
1,507mm59in
1,592mm63in
Ground clearance
138mm5in
-
Trunk volume
210L
300L
Max trunk volume
350L
350L
Doors
2
2
Seats
4
4
Fuel tank
63L
70L
CO2 emissions
226g/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 3 Series Convertible (E93) 335iBMW 6 Series Convertible (E64) 645CiPowerTorque
  • BMW 3 Series Convertible (E93) 335i: Power / Torque
  • BMW 6 Series Convertible (E64) 645Ci: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
BMW3 Series Convertible (E93)335i5,800 rpm1,300-5,000 rpm6,050 rpm
BMW6 Series Convertible (E64)645Ci6,100 rpm3,600 rpm6,350 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricBMW3 Series Convertible (E93)335iBMW6 Series Convertible (E64)645Ci
Acceleration checkpoints
0-60 mph
0-97 km/h
5.5 s
5.9 s
0-100 km/h
0-62 mph
5.8 s
6.2 s
0-200 km/h
0-124 mph
21.2 s
22.8 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Limited
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Likely limited
Drag race simulation
60 ft
18 m
2.3 s
2.4 s
330 ft
101 m
6.1 s
6.2 s
1/8 mile
201 m
9.1 s
9.3 s
1000 ft
305 m
11.7 s
12.0 s
1/4 mile
402 m
13.9 s
14.3 s
Trap speed
1/4 mile
402 m
167 km/h
104 mph
163 km/h
101 mph

Power comparison

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

Chart data table
VehicleValue
BMW3 Series Convertible (E93)335i
306 hp
228 kW
BMW6 Series Convertible (E64)645Ci
333 hp
248 kW

BMW 6 Series Convertible (E64) 645Ci has 27 hp more than BMW 3 Series Convertible (E93) 335i.

The biggest power difference is between BMW 3 Series Convertible (E93) 335i and BMW 6 Series Convertible (E64) 645Ci: 27 hp (20 kW).

Torque comparison

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

Chart data table
VehicleValue
BMW3 Series Convertible (E93)335i
400 Nm
295 lb-ft
BMW6 Series Convertible (E64)645Ci
450 Nm
332 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
BMW3 Series Convertible (E93)335i
1,735 kg
3,825 lb
BMW6 Series Convertible (E64)645Ci
1,820 kg
4,012 lb

Top speed without limiter comparison

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

Chart data table
VehicleValue
BMW3 Series Convertible (E93)335i
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
BMW6 Series Convertible (E64)645Ci
Unrestricted
260 km/h162 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
BMW3 Series Convertible (E93)335i5.8 s
BMW6 Series Convertible (E64)645Ci6.2 s

Although BMW 6 Series Convertible (E64) 645Ci has more power, BMW 3 Series Convertible (E93) 335i is quicker from 0-100 km/h.

The biggest 0-100 km/h difference is between BMW 3 Series Convertible (E93) 335i and BMW 6 Series Convertible (E64) 645Ci: 0.4 s.

Fuel consumption comparison

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

Chart data table
VehicleValue
BMW3 Series Convertible (E93)335i
9.5 L/100 km
24.8 mpg US
29.7 mpg UK
BMW6 Series Convertible (E64)645Ci
11.5 L/100 km
20.5 mpg US
24.6 mpg UK

The biggest fuel consumption difference is between BMW 3 Series Convertible (E93) 335i and BMW 6 Series Convertible (E64) 645Ci: 2.0 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
BMW3 Series Convertible (E93)335i
176 hp/t
132 kW/t
5.7 kg/hp
BMW6 Series Convertible (E64)645Ci
183 hp/t
136 kW/t
5.5 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
BMW3 Series Convertible (E93)335i
663 km
412 mi
BMW6 Series Convertible (E64)645Ci
609 km
378 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
BMW3 Series Convertible (E93)335i
306 hp
228 kW
5.8 s
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
BMW6 Series Convertible (E64)645Ci
333 hp
248 kW
6.2 s
Unrestricted
260 km/h162 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
BMW3 Series Convertible (E93)335i
Power
306 hp
228 kW
0-100 km/h5.8 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Doors/seats
2 doors
4 seats
Trunk
210 L
7.4 cu ft
Length
4,580 mm
180.3 in
Height
1,384 mm
54.5 in
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

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
BMW3 Series Convertible (E93)335i
Power
306 hp
228 kW
0-100 km/h5.8 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
9.5 L/100 km
24.8 mpg US
29.7 mpg UK
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
11.5 L/100 km
20.5 mpg US
24.6 mpg UK

BMW 3 Series Convertible (E93) 335i 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
BMW3 Series Convertible (E93)335i
9.5 L/100 km
24.8 mpg US
29.7 mpg UK
5.8 s
BMW6 Series Convertible (E64)645Ci
11.5 L/100 km
20.5 mpg US
24.6 mpg UK
6.2 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
BMW3 Series Convertible (E93)335i
176 hp/t
132 kW/t
5.7 kg/hp
9.5 L/100 km
24.8 mpg US
29.7 mpg UK
BMW6 Series Convertible (E64)645Ci
183 hp/t
136 kW/t
5.5 kg/hp
11.5 L/100 km
20.5 mpg US
24.6 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleBMW3 Series Convertible (E93)335iBMW6 Series Convertible (E64)645Ci
Power
306 hp
228 kW
333 hp
248 kW
Torque
400 Nm
295 lb-ft
450 Nm
332 lb-ft
Acceleration
5.8 s
6.2 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Lightness
1,735 kg
3,825 lb
1,820 kg
4,012 lb
Fuel consumption
9.5 L/100 km
24.8 mpg US
29.7 mpg UK
11.5 L/100 km
20.5 mpg US
24.6 mpg UK
Practicality
Doors/seats
2 doors
4 seats
Trunk
210 L
7.4 cu ft
Length
4,580 mm
180.3 in
Height
1,384 mm
54.5 in
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
Range score
663 km
412 mi
609 km
378 mi
CO2 score
226 g/km
-
Trunk score
210 L
7.4 cu ft
300 L
10.6 cu ft
Power-to-weight score
176 hp/t
132 kW/t
5.7 kg/hp
183 hp/t
136 kW/t
5.5 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 3 Series Convertible (E93) 335iBMW 6 Series Convertible (E64) 645Ci
Consumption9.5 L/100 km24.8 mpg US29.7 mpg UK11.5 L/100 km20.5 mpg US24.6 mpg UK
Cost / 100 km16.63 LC100 km20.13 LC100 km
Cost / 100 mi26.76 LC100 mi32.39 LC100 mi
Annual fuel used1,425 L376 US gal313 UK gal1,725 L456 US gal379 UK gal
Annual fuel cost2,494 LC/year3,019 LC/year

Head-to-head comparisons

BMW 3 Series Convertible (E93) 335i

  • Is 85 kg lighter
  • Is 0.4 s quicker from 0-100 km/h
  • Uses 2.0 L/100 km less fuel
  • Has 54 km (34 mi) more estimated range

Pros

  • Quickest 0-100 km/h in this comparison
  • Highest top speed
  • Lightest
  • Lowest combined fuel consumption
  • Best estimated range

Cons

  • Lowest power
  • Smallest trunk

BMW 6 Series Convertible (E64) 645Ci

  • Has 27 hp more
  • Has 50 Nm more
  • Has 7 hp/t better power-to-weight
  • Has 90 L more trunk volume

Pros

  • Most powerful
  • Highest torque
  • Best power-to-weight ratio
  • Largest trunk

Cons

  • Slowest 0-100 km/h
  • Highest combined fuel consumption
  • Heaviest

Choose cars to compare

Brand
Model
Generation
Engine or modification
BMW 3 Series Convertible (E93) 335i
BMW 6 Series Convertible (E64) 645Ci
Compare selected cars
2 vehicles selected

Popular comparisons

335i
335i
VS
BMW3 Series Convertible (E93)335ivsBMW3 Series Coupe (E92)335i
645Ci
650i
VS
BMW6 Series Convertible (E64)645CivsBMW6 Series Convertible (E64)Facelift 2007650i
335i
330Ci
VS
BMW3 Series Convertible (E93)335ivsBMW3 Series Convertible (E46)Facelift 2003330Ci
645Ci
645Ci
VS
BMW6 Series Convertible (E64)645CivsBMW6 Series (E63)645Ci
335i
335i
VS
BMW3 Series Convertible (E93)335ivsBMW3 Series Sedan (E90 LCI)Facelift 2008335i
645Ci
640i
VS
BMW6 Series Convertible (E64)645CivsBMW6 Series Convertible (F12)640i
335i
335i
VS
BMW3 Series Convertible (E93)335ivsBMW3 Series Touring (E91)335i
645Ci
635d
VS
BMW6 Series Convertible (E64)645CivsBMW6 Series (E63)Facelift 2007635d
335i
335i
VS
BMW3 Series Convertible (E93)335ivsBMW3 Series Sedan (E90)335i
645Ci
640i
VS
BMW6 Series Convertible (E64)645CivsBMW6 Series Gran Coupe (F06)640i
335i
330Ci
VS
BMW3 Series Convertible (E93)335ivsBMW3 Series Convertible (E46)330Ci
645Ci
640i
VS
BMW6 Series Convertible (E64)645CivsBMW6 Series Coupe (F13)640i
BMW 3 Series Convertible (E93) 335i vs BMW 6 Series Convertible (E64) 645Ci - car comparison - FastVsFaster