Car comparison

BMW 3 Series Convertible (E93) 330ivsAlfa 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 (E93)

330i

272 hp2996 ccGasolineRWDAutomaticNaturally aspiratedCabriolet / convertible2007-2010
VS

Alfa Romeo Spider (939)

3.2 V6

260 hp3195 ccGasolineAWDManualNaturally aspiratedCabriolet / convertible2006-2010

Comparison overview

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

Best choices

BMW 3 Series Convertible (E93) 330i

  • Quickest 0-100 km/h
    6.5 s
  • Fastest top speed
    260 km/h
    162 mph Unrestricted
    250 km/h
    155 mph Restricted
  • Most powerful
    272 hp
    203 kW
  • Lowest combined fuel consumption
    7.8 L/100 km
    30.2 mpg US
    36.2 mpg UK
  • Lowest city consumption
    10.5 L/100 km
    22.4 mpg US
    26.9 mpg UK
  • Lowest highway consumption
    6.0 L/100 km
    39.2 mpg US
    47.1 mpg UK
  • Best estimated range
    808 km
    502 mi
  • Best overall score
    53/100
  • Best performance score
    59/100
  • Best economy score
    86/100

Alfa Romeo Spider (939) 3.2 V6

  • Highest torque
    322 Nm
    237 lb-ft
  • Lightest
    1,690 kg
    3,726 lb
  • Best power-to-weight
    154 hp/t
    115 kW/t
    6.5 kg/hp
  • Largest trunk
    253 L
  • Best practicality score
    42/100

Specification comparison

Specification comparison
ModelBMW3 Series Convertible (E93)330iAlfa RomeoSpider (939)3.2 V6
Power
272hp203kW
260hp194kW
Torque
315Nm232lb-ft
322Nm237lb-ft
Curb weight
1,780kg3,924lb
1,690kg3,726lb
Gross weight
2,135kg4,707lb
-
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Calculated
235 km/h
146 mph
To 99% top speed
91.2s99% target: 257 km/h / 160 mph
Calculated
94.5s99% target: 233 km/h / 145 mph
Calculated
0-100 km/h
6.5s
7.0s
0-200 km/h
23.8s
Calculated
31.9s
Calculated
0-60 mph
6.2s
Calculated
6.6s
Calculated
Fuel consumption
7.8L/100 km30.2mpg US36.2mpg UK
11.5L/100 km20.5mpg US24.6mpg UK
Fuel consumption city
10.5L/100 km22.4mpg US26.9mpg UK
16.9L/100 km13.9mpg US16.7mpg UK
Fuel consumption highway
6L/100 km39.2mpg US47.1mpg UK
8.4L/100 km28mpg US33.6mpg UK
Quarter mile
14.5s
Calculated
15.0s
Calculated
Power-to-weight
153hp/t114kW/t69hp/1000 lb
Calculated
154hp/t115kW/t70hp/1000 lb
Calculated
Torque-to-weight
177Nm/t118lb-ft/ton
Calculated
191Nm/t127lb-ft/ton
Calculated
Estimated range
808km502mi
Calculated
609km378mi
Calculated
Displacement
2,996cc183cu in
3,195cc195cu in
Length
4,580mm180in
4,393mm173in
Width
1,782mm70in
1,830mm72in
Height
1,384mm54in
1,318mm52in
Wheelbase
2,760mm109in
2,528mm100in
Front track
1,500mm59in
1,579mm62in
Rear track
1,513mm60in
1,559mm61in
Ground clearance
138mm5in
-
Trunk volume
210L
253L
Max trunk volume
350L
-
Doors
2
2
Seats
4
4
Fuel tank
63L
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 3 Series Convertible (E93) 330iAlfa Romeo Spider (939) 3.2 V6PowerTorque
  • BMW 3 Series Convertible (E93) 330i: Power / Torque
  • Alfa Romeo Spider (939) 3.2 V6: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
BMW3 Series Convertible (E93)330i6,650 rpm2,750 rpm6,900 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
MetricBMW3 Series Convertible (E93)330iAlfa RomeoSpider (939)3.2 V6
Acceleration checkpoints
0-60 mph
0-97 km/h
6.2 s
6.6 s
0-100 km/h
0-62 mph
6.5 s
7.0 s
0-200 km/h
0-124 mph
23.8 s
31.9 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Likely limited
235 km/h
146 mph
Drag race simulation
60 ft
18 m
2.4 s
2.4 s
330 ft
101 m
6.3 s
6.4 s
1/8 mile
201 m
9.5 s
9.7 s
1000 ft
305 m
12.3 s
12.6 s
1/4 mile
402 m
14.5 s
15.0 s
Trap speed
1/4 mile
402 m
161 km/h
100 mph
151 km/h
94 mph

Power comparison

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

Chart data table
VehicleValue
BMW3 Series Convertible (E93)330i
272 hp
203 kW
Alfa RomeoSpider (939)3.2 V6
260 hp
194 kW

BMW 3 Series Convertible (E93) 330i has 12 hp more than Alfa Romeo Spider (939) 3.2 V6.

The biggest power difference is between Alfa Romeo Spider (939) 3.2 V6 and BMW 3 Series Convertible (E93) 330i: 12 hp (9 kW).

Torque comparison

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

Chart data table
VehicleValue
BMW3 Series Convertible (E93)330i
315 Nm
232 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
BMW3 Series Convertible (E93)330i
1,780 kg
3,924 lb
Alfa RomeoSpider (939)3.2 V6
1,690 kg
3,726 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)330i
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Alfa RomeoSpider (939)3.2 V6
235 km/h
146 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)330i6.5 s
Alfa RomeoSpider (939)3.2 V67.0 s

The biggest 0-100 km/h difference is between BMW 3 Series Convertible (E93) 330i and Alfa Romeo Spider (939) 3.2 V6: 0.5 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)330i
7.8 L/100 km
30.2 mpg US
36.2 mpg UK
Alfa RomeoSpider (939)3.2 V6
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) 330i and Alfa Romeo Spider (939) 3.2 V6: 3.7 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)330i
153 hp/t
114 kW/t
6.5 kg/hp
Alfa RomeoSpider (939)3.2 V6
154 hp/t
115 kW/t
6.5 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
BMW3 Series Convertible (E93)330i
808 km
502 mi
Alfa RomeoSpider (939)3.2 V6
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)330i
272 hp
203 kW
6.5 s
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Alfa RomeoSpider (939)3.2 V6
260 hp
194 kW
7.0 s
235 km/h
146 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)330i
Power
272 hp
203 kW
0-100 km/h6.5 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
Alfa RomeoSpider (939)3.2 V6
Power
260 hp
194 kW
0-100 km/h7.0 s
Top speed
235 km/h
146 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
BMW3 Series Convertible (E93)330i
Power
272 hp
203 kW
0-100 km/h6.5 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
7.8 L/100 km
30.2 mpg US
36.2 mpg UK
Alfa RomeoSpider (939)3.2 V6
Power
260 hp
194 kW
0-100 km/h7.0 s
Top speed
235 km/h
146 mph
11.5 L/100 km
20.5 mpg US
24.6 mpg UK

BMW 3 Series Convertible (E93) 330i 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)330i
7.8 L/100 km
30.2 mpg US
36.2 mpg UK
6.5 s
Alfa RomeoSpider (939)3.2 V6
11.5 L/100 km
20.5 mpg US
24.6 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
BMW3 Series Convertible (E93)330i
153 hp/t
114 kW/t
6.5 kg/hp
7.8 L/100 km
30.2 mpg US
36.2 mpg UK
Alfa RomeoSpider (939)3.2 V6
154 hp/t
115 kW/t
6.5 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)330iAlfa RomeoSpider (939)3.2 V6
Power
272 hp
203 kW
260 hp
194 kW
Torque
315 Nm
232 lb-ft
322 Nm
237 lb-ft
Acceleration
6.5 s
7.0 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
235 km/h
146 mph
Lightness
1,780 kg
3,924 lb
1,690 kg
3,726 lb
Fuel consumption
7.8 L/100 km
30.2 mpg US
36.2 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
253 L
8.9 cu ft
Length
4,393 mm
173.0 in
Height
1,318 mm
51.9 in
Range score
808 km
502 mi
609 km
378 mi
Trunk score
210 L
7.4 cu ft
253 L
8.9 cu ft
Power-to-weight score
153 hp/t
114 kW/t
6.5 kg/hp
154 hp/t
115 kW/t
6.5 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) 330iAlfa Romeo Spider (939) 3.2 V6
Consumption7.8 L/100 km30.2 mpg US36.2 mpg UK11.5 L/100 km20.5 mpg US24.6 mpg UK
Cost / 100 km13.65 LC100 km20.13 LC100 km
Cost / 100 mi21.97 LC100 mi32.39 LC100 mi
Annual fuel used1,170 L309 US gal257 UK gal1,725 L456 US gal379 UK gal
Annual fuel cost2,048 LC/year3,019 LC/year

Head-to-head comparisons

BMW 3 Series Convertible (E93) 330i

  • Has 12 hp more
  • Is 0.5 s quicker from 0-100 km/h
  • Has 25 km/h (16 mph) higher top speed
  • Uses 3.7 L/100 km less fuel
  • Has 199 km (124 mi) more estimated range

Pros

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

Cons

  • Heaviest
  • Smallest trunk

Alfa Romeo Spider (939) 3.2 V6

  • Has 7 Nm more
  • Is 90 kg lighter
  • Has 1 hp/t better power-to-weight
  • Has 43 L more trunk volume

Pros

  • Highest torque
  • Lightest
  • Best power-to-weight ratio
  • Largest trunk

Cons

  • Slowest 0-100 km/h
  • Lowest power
  • Highest combined fuel consumption
  • Lowest top speed

Choose cars to compare

Brand
Model
Generation
Engine or modification
BMW 3 Series Convertible (E93) 330i
Alfa Romeo Spider (939) 3.2 V6
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