Car comparison

BMW 1 Series Convertible (E88) 125ivsAlfa Romeo Spider (939) 3.2 V6

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

New comparison

BMW 1 Series Convertible (E88)

125i

218 hp2996 ccGasolineRWDManualNaturally aspiratedCabriolet / convertible2008-2011
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 1 Series Convertible (E88) 125i

  • Quickest 0-100 km/h
    6.8 s
  • Fastest top speed
    238 km/h
    148 mph
  • Lightest
    1,510 kg
    3,329 lb
  • Lowest combined fuel consumption
    8.1 L/100 km
    29.0 mpg US
    34.9 mpg UK
  • Lowest city consumption
    11.7 L/100 km
    20.1 mpg US
    24.1 mpg UK
  • Lowest highway consumption
    6.0 L/100 km
    39.2 mpg US
    47.1 mpg UK
  • Best estimated range
    654 km
    407 mi
  • Largest trunk
    260 L
  • Best overall score
    50/100
  • Best economy score
    85/100
  • 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
    154 hp/t
    115 kW/t
    6.5 kg/hp
  • Best performance score
    54/100

Specification comparison

Specification comparison
ModelBMW1 Series Convertible (E88)125iAlfa RomeoSpider (939)3.2 V6
Power
218hp163kW
260hp194kW
Torque
270Nm199lb-ft
322Nm237lb-ft
Curb weight
1,510kg3,329lb
1,690kg3,726lb
Gross weight
1,950kg4,299lb
-
Top speed
238 km/h
148 mph
235 km/h
146 mph
To 99% top speed
88.5s99% target: 236 km/h / 146 mph
Calculated
94.8s99% target: 233 km/h / 145 mph
Calculated
0-100 km/h
6.8s
7.0s
0-200 km/h
29.3s
Calculated
32.0s
Calculated
0-60 mph
6.4s
Calculated
6.6s
Calculated
Fuel consumption
8.1L/100 km29mpg US34.9mpg UK
11.5L/100 km20.5mpg US24.6mpg UK
Fuel consumption city
11.7L/100 km20.1mpg US24.1mpg 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
14.8s
Calculated
15.0s
Calculated
Power-to-weight
144hp/t108kW/t65hp/1000 lb
Calculated
154hp/t115kW/t70hp/1000 lb
Calculated
Torque-to-weight
179Nm/t120lb-ft/ton
Calculated
191Nm/t127lb-ft/ton
Calculated
Estimated range
654km407mi
Calculated
609km378mi
Calculated
Displacement
2,996cc183cu in
3,195cc195cu in
Length
4,360mm172in
4,393mm173in
Width
1,748mm69in
1,830mm72in
Height
1,411mm56in
1,318mm52in
Wheelbase
2,660mm105in
2,528mm100in
Front track
1,474mm58in
1,579mm62in
Rear track
1,507mm59in
1,559mm61in
Ground clearance
140mm6in
-
Trunk volume
260L
253L
Max trunk volume
305L
-
Doors
2
2
Seats
4
4
Fuel tank
53L
70L
CO2 emissions
195g/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 1 Series Convertible (E88) 125iAlfa Romeo Spider (939) 3.2 V6PowerTorque
  • BMW 1 Series Convertible (E88) 125i: Power / Torque
  • Alfa Romeo Spider (939) 3.2 V6: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
BMW1 Series Convertible (E88)125i6,100 rpm2,500-4,250 rpm6,350 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
MetricBMW1 Series Convertible (E88)125iAlfa RomeoSpider (939)3.2 V6
Acceleration checkpoints
0-60 mph
0-97 km/h
6.4 s
6.6 s
0-100 km/h
0-62 mph
6.8 s
7.0 s
0-200 km/h
0-124 mph
29.3 s
32.0 s
Top speed
238 km/h
148 mph
235 km/h
146 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
14.8 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
VehicleValue
BMW1 Series Convertible (E88)125i
218 hp
163 kW
Alfa RomeoSpider (939)3.2 V6
260 hp
194 kW

Alfa Romeo Spider (939) 3.2 V6 has 42 hp more than BMW 1 Series Convertible (E88) 125i.

The biggest power difference is between BMW 1 Series Convertible (E88) 125i and Alfa Romeo Spider (939) 3.2 V6: 42 hp (31 kW).

Torque comparison

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

Chart data table
VehicleValue
BMW1 Series Convertible (E88)125i
270 Nm
199 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
BMW1 Series Convertible (E88)125i
1,510 kg
3,329 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
BMW1 Series Convertible (E88)125i
238 km/h
148 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
BMW1 Series Convertible (E88)125i6.8 s
Alfa RomeoSpider (939)3.2 V67.0 s

Although Alfa Romeo Spider (939) 3.2 V6 has more power, BMW 1 Series Convertible (E88) 125i is quicker from 0-100 km/h.

The biggest 0-100 km/h difference is between BMW 1 Series Convertible (E88) 125i and Alfa Romeo Spider (939) 3.2 V6: 0.2 s.

Fuel consumption comparison

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

Chart data table
VehicleValue
BMW1 Series Convertible (E88)125i
8.1 L/100 km
29.0 mpg US
34.9 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 1 Series Convertible (E88) 125i and Alfa Romeo Spider (939) 3.2 V6: 3.4 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
BMW1 Series Convertible (E88)125i
144 hp/t
108 kW/t
6.9 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
BMW1 Series Convertible (E88)125i
654 km
407 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
BMW1 Series Convertible (E88)125i
218 hp
163 kW
6.8 s
238 km/h
148 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
BMW1 Series Convertible (E88)125i
Power
218 hp
163 kW
0-100 km/h6.8 s
Top speed
238 km/h
148 mph
Doors/seats
2 doors
4 seats
Trunk
260 L
9.2 cu ft
Length
4,360 mm
171.7 in
Height
1,411 mm
55.6 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
BMW1 Series Convertible (E88)125i
Power
218 hp
163 kW
0-100 km/h6.8 s
Top speed
238 km/h
148 mph
8.1 L/100 km
29.0 mpg US
34.9 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 1 Series Convertible (E88) 125i 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
BMW1 Series Convertible (E88)125i
8.1 L/100 km
29.0 mpg US
34.9 mpg UK
6.8 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
BMW1 Series Convertible (E88)125i
144 hp/t
108 kW/t
6.9 kg/hp
8.1 L/100 km
29.0 mpg US
34.9 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
VehicleBMW1 Series Convertible (E88)125iAlfa RomeoSpider (939)3.2 V6
Power
218 hp
163 kW
260 hp
194 kW
Torque
270 Nm
199 lb-ft
322 Nm
237 lb-ft
Acceleration
6.8 s
7.0 s
Top speed
238 km/h
148 mph
235 km/h
146 mph
Lightness
1,510 kg
3,329 lb
1,690 kg
3,726 lb
Fuel consumption
8.1 L/100 km
29.0 mpg US
34.9 mpg UK
11.5 L/100 km
20.5 mpg US
24.6 mpg UK
Practicality
Doors/seats
2 doors
4 seats
Trunk
260 L
9.2 cu ft
Length
4,360 mm
171.7 in
Height
1,411 mm
55.6 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
654 km
407 mi
609 km
378 mi
CO2 score
195 g/km
-
Trunk score
260 L
9.2 cu ft
253 L
8.9 cu ft
Power-to-weight score
144 hp/t
108 kW/t
6.9 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 1 Series Convertible (E88) 125iAlfa Romeo Spider (939) 3.2 V6
Consumption8.1 L/100 km29 mpg US34.9 mpg UK11.5 L/100 km20.5 mpg US24.6 mpg UK
Cost / 100 km14.17 LC100 km20.13 LC100 km
Cost / 100 mi22.81 LC100 mi32.39 LC100 mi
Annual fuel used1,215 L321 US gal267 UK gal1,725 L456 US gal379 UK gal
Annual fuel cost2,126 LC/year3,019 LC/year

Head-to-head comparisons

BMW 1 Series Convertible (E88) 125i

  • Is 180 kg lighter
  • Is 0.2 s quicker from 0-100 km/h
  • Has 3 km/h (2 mph) higher top speed
  • Uses 3.4 L/100 km less fuel
  • Has 46 km (28 mi) more estimated range
  • Has 7 L more trunk volume

Pros

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

Cons

  • Lowest power

Alfa Romeo Spider (939) 3.2 V6

  • Has 42 hp more
  • Has 52 Nm more
  • Has 9 hp/t better power-to-weight

Pros

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

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 1 Series Convertible (E88) 125i
Alfa Romeo Spider (939) 3.2 V6
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2 vehicles selected

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