Car comparison

BMW 3 Series Convertible (E46) · Facelift 2003 330CivsAlfa Romeo Spider (939) 3.2 V6

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

New comparison

BMW 3 Series Convertible (E46) · Facelift 2003

330Ci

231 hp2979 ccGasolineRWDManualNaturally aspiratedCabriolet / convertible2003-2006

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.

BMW 3 Series Convertible (E46) Facelift 2003 330Ci

Quickest 0-100 km/h
6.9 s
Fastest top speed
247 km/h
153 mph
Lightest
1,660 kg
3,660 lb
Lowest combined fuel consumption
9.6 L/100 km
24.5 mpg US
29.4 mpg UK
Best estimated range
656 km
408 mi
Largest trunk
260 L
Best overall score
50/100
Best performance score
54/100
Best economy score
81/100
Best practicality score
43/100

Alfa Romeo Spider (939) 3.2 V6

Most powerful
260 hp
194 kW
Highest torque
322 Nm
237 lb-ft
Best power-to-weight
147 hp/t
110 kW/t
6.8 kg/hp

Specification comparison

Specification comparison
Model	BMW3 Series Convertible (E46)Facelift 2003330Ci	Alfa RomeoSpider (939)3.2 V6
Power	231hp172kW	260hp194kW
Torque	300Nm221lb-ft	322Nm237lb-ft
Curb weight	1,660kg3,660lb	1,765kg3,891lb
Gross weight	2,005kg4,420lb	-
Top speed	247 km/h 153 mph	240 km/h 149 mph
To 99% top speed	99.2s99% target: 245 km/h / 152 mph Calculated	100.0s99% target: 238 km/h / 148 mph Calculated
0-100 km/h	6.9s	7.0s
0-200 km/h	28.5s 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	13.4L/100 km17.6mpg US21.1mpg UK	-
Fuel consumption highway	7.3L/100 km32.2mpg US38.7mpg UK	-
Quarter mile	14.9s Calculated	15.0s Calculated
Power-to-weight	139hp/t104kW/t63hp/1000 lb Calculated	147hp/t110kW/t67hp/1000 lb Calculated
Torque-to-weight	181Nm/t121lb-ft/ton Calculated	182Nm/t122lb-ft/ton Calculated
Estimated range	656km408mi Calculated	574km357mi Calculated
Displacement	2,979cc182cu in	3,195cc195cu in
Length	4,488mm177in	4,393mm173in
Width	1,757mm69in	1,830mm72in
Height	1,370mm54in	1,318mm52in
Wheelbase	2,725mm107in	2,528mm100in
Front track	1,471mm58in	1,579mm62in
Rear track	1,483mm58in	1,559mm61in
Trunk volume	260L	253L
Max trunk volume	300L	-
Doors	2	2
Seats	4	4
Fuel tank	63L	70L
CO2 emissions	229g/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 (E46) Facelift 2003 330CiAlfa Romeo Spider (939) 3.2 V6PowerTorque

Dyno simulation data table
Vehicle	Peak power RPM	Peak torque RPM	Max engine speed
BMW3 Series Convertible (E46)Facelift 2003330Ci	5,900 rpm	3,500 rpm	6,150 rpm
Alfa RomeoSpider (939)3.2 V6	6,200 rpm	4,500 rpm	6,450 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
Metric	BMW3 Series Convertible (E46)Facelift 2003330Ci	Alfa 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	28.5 s	31.0 s
Top speed	247 km/h 153 mph	240 km/h 149 mph
	Drag race simulation
60 ft 18 m	2.4 s	2.4 s
330 ft 101 m	6.4 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	154 km/h 96 mph	151 km/h 94 mph

Power comparison

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

Chart data table
Vehicle	Value
BMW3 Series Convertible (E46)Facelift 2003330Ci	231 hp 172 kW
Alfa RomeoSpider (939)3.2 V6	260 hp 194 kW

Alfa Romeo Spider (939) 3.2 V6 has 29 hp more than BMW 3 Series Convertible (E46) Facelift 2003 330Ci.

The biggest power difference is between BMW 3 Series Convertible (E46) Facelift 2003 330Ci and Alfa Romeo Spider (939) 3.2 V6: 29 hp (22 kW).

Torque comparison

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

Chart data table
Vehicle	Value
BMW3 Series Convertible (E46)Facelift 2003330Ci	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
Vehicle	Value
BMW3 Series Convertible (E46)Facelift 2003330Ci	1,660 kg 3,660 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
Vehicle	Value
BMW3 Series Convertible (E46)Facelift 2003330Ci	247 km/h 153 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
Vehicle	Value
BMW3 Series Convertible (E46)Facelift 2003330Ci	6.9 s
Alfa RomeoSpider (939)3.2 V6	7.0 s

Although Alfa Romeo Spider (939) 3.2 V6 has more power, BMW 3 Series Convertible (E46) Facelift 2003 330Ci is quicker from 0-100 km/h.

The biggest 0-100 km/h difference is between BMW 3 Series Convertible (E46) Facelift 2003 330Ci 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
Vehicle	Value
BMW3 Series Convertible (E46)Facelift 2003330Ci	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 3 Series Convertible (E46) Facelift 2003 330Ci 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
Vehicle	Value
BMW3 Series Convertible (E46)Facelift 2003330Ci	139 hp/t 104 kW/t 7.2 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
Vehicle	Value
BMW3 Series Convertible (E46)Facelift 2003330Ci	656 km 408 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
Vehicle	Power	Acceleration	Top speed
BMW3 Series Convertible (E46)Facelift 2003330Ci	231 hp 172 kW	6.9 s	247 km/h 153 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.

Vehicle

Performance score

Practicality score

BMW3 Series Convertible (E46)Facelift 2003330Ci

Power	231 hp 172 kW
0-100 km/h	6.9 s
Top speed 247 km/h 153 mph

Doors/seats	2 doors 4 seats
Trunk	260 L 9.2 cu ft
Length	4,488 mm 176.7 in
Height	1,370 mm 53.9 in

Alfa RomeoSpider (939)3.2 V6

Power	260 hp 194 kW
0-100 km/h	7.0 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.

Vehicle

Performance score

Fuel economy score

BMW3 Series Convertible (E46)Facelift 2003330Ci

Power	231 hp 172 kW
0-100 km/h	6.9 s
Top speed 247 km/h 153 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/h	7.0 s
Top speed 240 km/h 149 mph

12.2 L/100 km

19.3 mpg US

23.2 mpg UK

BMW 3 Series Convertible (E46) Facelift 2003 330Ci 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
BMW3 Series Convertible (E46)Facelift 2003330Ci	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
Vehicle	Power-to-weight, hp/t	Fuel consumption, L/100 km
BMW3 Series Convertible (E46)Facelift 2003330Ci	139 hp/t 104 kW/t 7.2 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

Vehicle

BMW3 Series Convertible (E46)Facelift 2003330Ci

Alfa RomeoSpider (939)3.2 V6

Power

231 hp

172 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

247 km/h

153 mph

240 km/h

149 mph

Lightness

1,660 kg

3,660 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	260 L 9.2 cu ft
Length	4,488 mm 176.7 in
Height	1,370 mm 53.9 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

656 km

408 mi

574 km

357 mi

CO2 score

229 g/km

Trunk score

260 L

9.2 cu ft

253 L

8.9 cu ft

Power-to-weight score

139 hp/t

104 kW/t

7.2 kg/hp

147 hp/t

110 kW/t

6.8 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 3 Series Convertible (E46) Facelift 2003 330Ci	Alfa Romeo Spider (939) 3.2 V6
Consumption	9.6 L/100 km24.5 mpg US29.4 mpg UK	12.2 L/100 km19.3 mpg US23.2 mpg UK
Cost / 100 km	16.80 LC100 km	21.35 LC100 km
Cost / 100 mi	27.04 LC100 mi	34.36 LC100 mi
Annual fuel used	1,440 L380 US gal317 UK gal	1,830 L483 US gal403 UK gal
Annual fuel cost	2,520 LC/year	3,203 LC/year