Car comparison

BMW 6 Series Convertible (E64) 630ivsAlfa Romeo Spider (939) 3.2 V6

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

New comparison

BMW 6 Series Convertible (E64)

630i

258 hp2996 ccGasolineRWDManualNaturally aspiratedCabriolet / convertible2004-2007
VS

Alfa Romeo Spider (939)

3.2 V6

260 hp3195 ccGasolineAWDAutomaticNaturally aspiratedCabriolet / convertible2006-2010

Comparison overview

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

Best choices

BMW 6 Series Convertible (E64) 630i

  • Quickest 0-100 km/h
    6.9 s
  • Fastest top speed
    260 km/h
    162 mph Unrestricted
    250 km/h
    155 mph Restricted
  • Lightest
    1,685 kg
    3,715 lb
  • Best power-to-weight
    153 hp/t
    114 kW/t
    6.5 kg/hp
  • Lowest combined fuel consumption
    9.6 L/100 km
    24.5 mpg US
    29.4 mpg UK
  • Best estimated range
    729 km
    453 mi
  • Largest trunk
    300 L
  • Best overall score
    53/100
  • Best performance score
    57/100
  • Best economy score
    81/100
  • Best practicality score
    45/100

Specification comparison

Specification comparison
ModelBMW6 Series Convertible (E64)630iAlfa RomeoSpider (939)3.2 V6
Power
258hp192kW
260hp194kW
Torque
300Nm221lb-ft
322Nm237lb-ft
Curb weight
1,685kg3,715lb
1,765kg3,891lb
Gross weight
2,085kg4,597lb
-
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Calculated
240 km/h
149 mph
To 99% top speed
101.6s99% target: 257 km/h / 160 mph
Calculated
99.7s99% target: 238 km/h / 148 mph
Calculated
0-100 km/h
6.9s
7.0s
0-200 km/h
25.9s
Calculated
31.0s
Calculated
0-60 mph
6.5s
Calculated
6.6s
Calculated
Fuel consumption
9.6L/100 km24.5mpg US29.4mpg UK
12.2L/100 km19.3mpg US23.2mpg UK
Fuel consumption city
13.6L/100 km17.3mpg US20.8mpg UK
-
Fuel consumption highway
7.3L/100 km32.2mpg US38.7mpg UK
-
Quarter mile
14.9s
Calculated
15.0s
Calculated
Power-to-weight
153hp/t114kW/t69hp/1000 lb
Calculated
147hp/t110kW/t67hp/1000 lb
Calculated
Torque-to-weight
178Nm/t119lb-ft/ton
Calculated
182Nm/t122lb-ft/ton
Calculated
Estimated range
729km453mi
Calculated
574km357mi
Calculated
Displacement
2,996cc183cu in
3,195cc195cu in
Length
4,820mm190in
4,393mm173in
Width
1,855mm73in
1,830mm72in
Height
1,373mm54in
1,318mm52in
Wheelbase
2,780mm109in
2,528mm100in
Front track
1,558mm61in
1,579mm62in
Rear track
1,596mm63in
1,559mm61in
Trunk volume
300L
253L
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) 630iAlfa Romeo Spider (939) 3.2 V6PowerTorque
  • BMW 6 Series Convertible (E64) 630i: Power / Torque
  • Alfa Romeo Spider (939) 3.2 V6: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
BMW6 Series Convertible (E64)630i6,600 rpm2,500 rpm6,850 rpm
Alfa RomeoSpider (939)3.2 V66,200 rpm4,500 rpm6,450 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricBMW6 Series Convertible (E64)630iAlfa RomeoSpider (939)3.2 V6
Acceleration checkpoints
0-60 mph
0-97 km/h
6.5 s
6.6 s
0-100 km/h
0-62 mph
6.9 s
7.0 s
0-200 km/h
0-124 mph
25.9 s
31.0 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Likely limited
240 km/h
149 mph
Drag race simulation
60 ft
18 m
2.4 s
2.4 s
330 ft
101 m
6.5 s
6.4 s
1/8 mile
201 m
9.7 s
9.7 s
1000 ft
305 m
12.5 s
12.6 s
1/4 mile
402 m
14.9 s
15.0 s
Trap speed
1/4 mile
402 m
157 km/h
97 mph
152 km/h
94 mph

Power comparison

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

Chart data table
VehicleValue
BMW6 Series Convertible (E64)630i
258 hp
192 kW
Alfa RomeoSpider (939)3.2 V6
260 hp
194 kW

Alfa Romeo Spider (939) 3.2 V6 has 2 hp more than BMW 6 Series Convertible (E64) 630i.

The biggest power difference is between BMW 6 Series Convertible (E64) 630i and Alfa Romeo Spider (939) 3.2 V6: 2 hp (1 kW).

Torque comparison

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

Chart data table
VehicleValue
BMW6 Series Convertible (E64)630i
300 Nm
221 lb-ft
Alfa RomeoSpider (939)3.2 V6
322 Nm
237 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
BMW6 Series Convertible (E64)630i
1,685 kg
3,715 lb
Alfa RomeoSpider (939)3.2 V6
1,765 kg
3,891 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)630i
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Alfa RomeoSpider (939)3.2 V6
240 km/h
149 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)630i6.9 s
Alfa RomeoSpider (939)3.2 V67.0 s

Although Alfa Romeo Spider (939) 3.2 V6 has more power, BMW 6 Series Convertible (E64) 630i is quicker from 0-100 km/h.

The biggest 0-100 km/h difference is between BMW 6 Series Convertible (E64) 630i and Alfa Romeo Spider (939) 3.2 V6: 0.1 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 Convertible (E64)630i
9.6 L/100 km
24.5 mpg US
29.4 mpg UK
Alfa RomeoSpider (939)3.2 V6
12.2 L/100 km
19.3 mpg US
23.2 mpg UK

The biggest fuel consumption difference is between BMW 6 Series Convertible (E64) 630i and Alfa Romeo Spider (939) 3.2 V6: 2.6 L/100 km.

Power-to-weight comparison

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

Chart data table
VehicleValue
BMW6 Series Convertible (E64)630i
153 hp/t
114 kW/t
6.5 kg/hp
Alfa RomeoSpider (939)3.2 V6
147 hp/t
110 kW/t
6.8 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
BMW6 Series Convertible (E64)630i
729 km
453 mi
Alfa RomeoSpider (939)3.2 V6
574 km
357 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
BMW6 Series Convertible (E64)630i
258 hp
192 kW
6.9 s
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Alfa RomeoSpider (939)3.2 V6
260 hp
194 kW
7.0 s
240 km/h
149 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)630i
Power
258 hp
192 kW
0-100 km/h6.9 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
Alfa RomeoSpider (939)3.2 V6
Power
260 hp
194 kW
0-100 km/h7.0 s
Top speed
240 km/h
149 mph
Doors/seats
2 doors
4 seats
Trunk
253 L
8.9 cu ft
Length
4,393 mm
173.0 in
Height
1,318 mm
51.9 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 Convertible (E64)630i
Power
258 hp
192 kW
0-100 km/h6.9 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
9.6 L/100 km
24.5 mpg US
29.4 mpg UK
Alfa RomeoSpider (939)3.2 V6
Power
260 hp
194 kW
0-100 km/h7.0 s
Top speed
240 km/h
149 mph
12.2 L/100 km
19.3 mpg US
23.2 mpg UK

BMW 6 Series Convertible (E64) 630i 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 Convertible (E64)630i
9.6 L/100 km
24.5 mpg US
29.4 mpg UK
6.9 s
Alfa RomeoSpider (939)3.2 V6
12.2 L/100 km
19.3 mpg US
23.2 mpg UK
7.0 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 Convertible (E64)630i
153 hp/t
114 kW/t
6.5 kg/hp
9.6 L/100 km
24.5 mpg US
29.4 mpg UK
Alfa RomeoSpider (939)3.2 V6
147 hp/t
110 kW/t
6.8 kg/hp
12.2 L/100 km
19.3 mpg US
23.2 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleBMW6 Series Convertible (E64)630iAlfa RomeoSpider (939)3.2 V6
Power
258 hp
192 kW
260 hp
194 kW
Torque
300 Nm
221 lb-ft
322 Nm
237 lb-ft
Acceleration
6.9 s
7.0 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
240 km/h
149 mph
Lightness
1,685 kg
3,715 lb
1,765 kg
3,891 lb
Fuel consumption
9.6 L/100 km
24.5 mpg US
29.4 mpg UK
12.2 L/100 km
19.3 mpg US
23.2 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
253 L
8.9 cu ft
Length
4,393 mm
173.0 in
Height
1,318 mm
51.9 in
Range score
729 km
453 mi
574 km
357 mi
Trunk score
300 L
10.6 cu ft
253 L
8.9 cu ft
Power-to-weight score
153 hp/t
114 kW/t
6.5 kg/hp
147 hp/t
110 kW/t
6.8 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) 630iAlfa Romeo Spider (939) 3.2 V6
Consumption9.6 L/100 km24.5 mpg US29.4 mpg UK12.2 L/100 km19.3 mpg US23.2 mpg UK
Cost / 100 km16.80 LC100 km21.35 LC100 km
Cost / 100 mi27.04 LC100 mi34.36 LC100 mi
Annual fuel used1,440 L380 US gal317 UK gal1,830 L483 US gal403 UK gal
Annual fuel cost2,520 LC/year3,203 LC/year

Head-to-head comparisons

BMW 6 Series Convertible (E64) 630i

  • Is 80 kg lighter
  • Is 0.1 s quicker from 0-100 km/h
  • Has 20 km/h (12 mph) higher top speed
  • Uses 2.6 L/100 km less fuel
  • Has 6 hp/t better power-to-weight
  • Has 155 km (97 mi) more estimated range
  • Has 47 L more trunk volume

Pros

  • Quickest 0-100 km/h in this comparison
  • Highest top speed
  • Lightest
  • Lowest combined fuel consumption
  • Best power-to-weight ratio
  • Best estimated range
  • Largest trunk

Cons

  • Lowest power

Alfa Romeo Spider (939) 3.2 V6

  • Has 2 hp more
  • Has 22 Nm more

Pros

  • Most powerful
  • Highest torque

Cons

  • Slowest 0-100 km/h
  • Highest combined fuel consumption
  • Heaviest
  • Lowest top speed
  • Smallest trunk

Choose cars to compare

Brand
Model
Generation
Engine or modification
BMW 6 Series Convertible (E64) 630i
Alfa Romeo Spider (939) 3.2 V6
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