Car comparison

BMW 1 Series Convertible (E88) 135ivsBMW 6 Series Convertible (E64) 650i

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

New comparison

BMW 1 Series Convertible (E88)

135i

306 hp2979 ccGasolineRWDAutomaticTwin-turboCabriolet / convertible2008-2010
VS

BMW 6 Series Convertible (E64)

650i

367 hp4799 ccGasolineRWDManualNaturally aspiratedCabriolet / convertible2005-2007

Comparison overview

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

Best choices

BMW 1 Series Convertible (E88) 135i

  • Quickest 0-100 km/h
    5.7 s
  • Fastest top speed
    260 km/h
    162 mph Unrestricted
    250 km/h
    155 mph Restricted
  • Lightest
    1,610 kg
    3,549 lb
  • Lowest combined fuel consumption
    9.4 L/100 km
    25.0 mpg US
    30.1 mpg UK
  • Lowest city consumption
    13.5 L/100 km
    17.4 mpg US
    20.9 mpg UK
  • Lowest highway consumption
    7.0 L/100 km
    33.6 mpg US
    40.4 mpg UK
  • Best estimated range
    564 km
    350 mi
  • Best economy score
    82/100

BMW 6 Series Convertible (E64) 650i

  • Most powerful
    367 hp
    274 kW
  • Highest torque
    490 Nm
    361 lb-ft
  • Best power-to-weight
    198 hp/t
    148 kW/t
    5.0 kg/hp
  • Largest trunk
    300 L
  • Best overall score
    61/100
  • Best performance score
    69/100
  • Best practicality score
    45/100

Specification comparison

Specification comparison
ModelBMW1 Series Convertible (E88)135iBMW6 Series Convertible (E64)650i
Power
306hp228kW
367hp274kW
Torque
400Nm295lb-ft
490Nm361lb-ft
Curb weight
1,610kg3,549lb
1,850kg4,079lb
Gross weight
2,050kg4,519lb
2,250kg4,960lb
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
80.5s99% target: 257 km/h / 160 mph
Calculated
78.9s99% target: 257 km/h / 160 mph
Calculated
0-100 km/h
5.7s
5.7s
0-200 km/h
20.9s
Calculated
20.7s
Calculated
0-60 mph
5.4s
Calculated
5.4s
Calculated
Fuel consumption
9.4L/100 km25mpg US30.1mpg UK
12.9L/100 km18.2mpg US21.9mpg UK
Fuel consumption city
13.5L/100 km17.4mpg US20.9mpg UK
19.1L/100 km12.3mpg US14.8mpg UK
Fuel consumption highway
7L/100 km33.6mpg US40.4mpg UK
9.3L/100 km25.3mpg US30.4mpg UK
Quarter mile
13.8s
Calculated
13.8s
Calculated
Power-to-weight
190hp/t142kW/t86hp/1000 lb
Calculated
198hp/t148kW/t90hp/1000 lb
Calculated
Torque-to-weight
248Nm/t166lb-ft/ton
Calculated
265Nm/t177lb-ft/ton
Calculated
Estimated range
564km350mi
Calculated
543km337mi
Calculated
Displacement
2,979cc182cu in
4,799cc293cu in
Length
4,360mm172in
4,820mm190in
Width
1,748mm69in
1,855mm73in
Height
1,411mm56in
1,373mm54in
Wheelbase
2,660mm105in
2,780mm109in
Front track
1,474mm58in
1,558mm61in
Rear track
1,507mm59in
1,596mm63in
Ground clearance
140mm6in
-
Trunk volume
260L
300L
Max trunk volume
305L
350L
Doors
2
2
Seats
4
4
Fuel tank
53L
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 1 Series Convertible (E88) 135iBMW 6 Series Convertible (E64) 650iPowerTorque
  • BMW 1 Series Convertible (E88) 135i: Power / Torque
  • BMW 6 Series Convertible (E64) 650i: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
BMW1 Series Convertible (E88)135i5,800 rpm1,300-5,000 rpm6,050 rpm
BMW6 Series Convertible (E64)650i6,300 rpm3,400 rpm6,550 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricBMW1 Series Convertible (E88)135iBMW6 Series Convertible (E64)650i
Acceleration checkpoints
0-60 mph
0-97 km/h
5.4 s
5.4 s
0-100 km/h
0-62 mph
5.7 s
5.7 s
0-200 km/h
0-124 mph
20.9 s
20.7 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
2.3 s
330 ft
101 m
6.0 s
6.0 s
1/8 mile
201 m
9.0 s
9.0 s
1000 ft
305 m
11.6 s
11.6 s
1/4 mile
402 m
13.8 s
13.8 s
Trap speed
1/4 mile
402 m
167 km/h
104 mph
168 km/h
104 mph

Power comparison

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

Chart data table
VehicleValue
BMW1 Series Convertible (E88)135i
306 hp
228 kW
BMW6 Series Convertible (E64)650i
367 hp
274 kW

BMW 6 Series Convertible (E64) 650i has 61 hp more than BMW 1 Series Convertible (E88) 135i.

The biggest power difference is between BMW 1 Series Convertible (E88) 135i and BMW 6 Series Convertible (E64) 650i: 61 hp (45 kW).

Torque comparison

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

Chart data table
VehicleValue
BMW1 Series Convertible (E88)135i
400 Nm
295 lb-ft
BMW6 Series Convertible (E64)650i
490 Nm
361 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
BMW1 Series Convertible (E88)135i
1,610 kg
3,549 lb
BMW6 Series Convertible (E64)650i
1,850 kg
4,079 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)135i
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
BMW6 Series Convertible (E64)650i
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
BMW1 Series Convertible (E88)135i5.7 s
BMW6 Series Convertible (E64)650i5.7 s

Although BMW 6 Series Convertible (E64) 650i has more power, BMW 1 Series Convertible (E88) 135i is quicker from 0-100 km/h.

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)135i
9.4 L/100 km
25.0 mpg US
30.1 mpg UK
BMW6 Series Convertible (E64)650i
12.9 L/100 km
18.2 mpg US
21.9 mpg UK

The biggest fuel consumption difference is between BMW 1 Series Convertible (E88) 135i and BMW 6 Series Convertible (E64) 650i: 3.5 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)135i
190 hp/t
142 kW/t
5.3 kg/hp
BMW6 Series Convertible (E64)650i
198 hp/t
148 kW/t
5.0 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
BMW1 Series Convertible (E88)135i
564 km
350 mi
BMW6 Series Convertible (E64)650i
543 km
337 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
BMW1 Series Convertible (E88)135i
306 hp
228 kW
5.7 s
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
BMW6 Series Convertible (E64)650i
367 hp
274 kW
5.7 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
BMW1 Series Convertible (E88)135i
Power
306 hp
228 kW
0-100 km/h5.7 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 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
BMW6 Series Convertible (E64)650i
Power
367 hp
274 kW
0-100 km/h5.7 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
BMW1 Series Convertible (E88)135i
Power
306 hp
228 kW
0-100 km/h5.7 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
9.4 L/100 km
25.0 mpg US
30.1 mpg UK
BMW6 Series Convertible (E64)650i
Power
367 hp
274 kW
0-100 km/h5.7 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
12.9 L/100 km
18.2 mpg US
21.9 mpg UK

BMW 1 Series Convertible (E88) 135i 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)135i
9.4 L/100 km
25.0 mpg US
30.1 mpg UK
5.7 s
BMW6 Series Convertible (E64)650i
12.9 L/100 km
18.2 mpg US
21.9 mpg UK
5.7 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)135i
190 hp/t
142 kW/t
5.3 kg/hp
9.4 L/100 km
25.0 mpg US
30.1 mpg UK
BMW6 Series Convertible (E64)650i
198 hp/t
148 kW/t
5.0 kg/hp
12.9 L/100 km
18.2 mpg US
21.9 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleBMW1 Series Convertible (E88)135iBMW6 Series Convertible (E64)650i
Power
306 hp
228 kW
367 hp
274 kW
Torque
400 Nm
295 lb-ft
490 Nm
361 lb-ft
Acceleration
5.7 s
5.7 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Lightness
1,610 kg
3,549 lb
1,850 kg
4,079 lb
Fuel consumption
9.4 L/100 km
25.0 mpg US
30.1 mpg UK
12.9 L/100 km
18.2 mpg US
21.9 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
300 L
10.6 cu ft
Length
4,820 mm
189.8 in
Height
1,373 mm
54.1 in
Range score
564 km
350 mi
543 km
337 mi
Trunk score
260 L
9.2 cu ft
300 L
10.6 cu ft
Power-to-weight score
190 hp/t
142 kW/t
5.3 kg/hp
198 hp/t
148 kW/t
5.0 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) 135iBMW 6 Series Convertible (E64) 650i
Consumption9.4 L/100 km25 mpg US30.1 mpg UK12.9 L/100 km18.2 mpg US21.9 mpg UK
Cost / 100 km16.45 LC100 km22.58 LC100 km
Cost / 100 mi26.47 LC100 mi36.33 LC100 mi
Annual fuel used1,410 L372 US gal310 UK gal1,935 L511 US gal426 UK gal
Annual fuel cost2,468 LC/year3,386 LC/year

Head-to-head comparisons

BMW 1 Series Convertible (E88) 135i

  • Is 240 kg lighter
  • Uses 3.5 L/100 km less fuel
  • Has 21 km (13 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) 650i

  • Has 61 hp more
  • Has 90 Nm more
  • Has 8 hp/t better power-to-weight
  • Has 40 L more trunk volume

Pros

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

Cons

  • Highest combined fuel consumption
  • Heaviest

Choose cars to compare

Brand
Model
Generation
Engine or modification
BMW 1 Series Convertible (E88) 135i
BMW 6 Series Convertible (E64) 650i
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