Car comparison

BMW 1 Series Coupe (E82) 135ivsBMW 6 Series (E63) 645Ci

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

New comparison

BMW 1 Series Coupe (E82)

135i

306 hp2979 ccGasolineRWDManualTwin-turboCoupe2007-2010
VS

BMW 6 Series (E63)

645Ci

333 hp4398 ccGasolineRWDManualNaturally aspiratedCoupe2003-2005

Comparison overview

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

Best choices

BMW 1 Series Coupe (E82) 135i

  • Quickest 0-100 km/h
    5.3 s
  • Fastest top speed
    265 km/h
    165 mph Unrestricted
    250 km/h
    155 mph Restricted
  • Lightest
    1,485 kg
    3,274 lb
  • Best power-to-weight
    206 hp/t
    154 kW/t
    4.9 kg/hp
  • Lowest combined fuel consumption
    9.2 L/100 km
    25.6 mpg US
    30.7 mpg UK
  • Lowest city consumption
    13.0 L/100 km
    18.1 mpg US
    21.7 mpg UK
  • Lowest highway consumption
    7.0 L/100 km
    33.6 mpg US
    40.4 mpg UK
  • Best economy score
    82/100

BMW 6 Series (E63) 645Ci

  • Most powerful
    333 hp
    248 kW
  • Highest torque
    450 Nm
    332 lb-ft
  • Best estimated range
    598 km
    372 mi
  • Largest trunk
    450 L
  • Best overall score
    63/100
  • Best performance score
    68/100
  • Best practicality score
    53/100

Specification comparison

Specification comparison
ModelBMW1 Series Coupe (E82)135iBMW6 Series (E63)645Ci
Power
306hp228kW
333hp248kW
Torque
400Nm295lb-ft
450Nm332lb-ft
Curb weight
1,485kg3,274lb
1,690kg3,726lb
Gross weight
1,925kg4,244lb
2,065kg4,553lb
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Calculated
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Calculated
To 99% top speed
73.2s99% target: 262 km/h / 163 mph
Calculated
76.8s99% target: 262 km/h / 163 mph
Calculated
0-100 km/h
5.3s
5.6s
0-200 km/h
18.6s
Calculated
19.6s
Calculated
0-60 mph
5.0s
Calculated
5.3s
Calculated
Fuel consumption
9.2L/100 km25.6mpg US30.7mpg UK
11.7L/100 km20.1mpg US24.1mpg UK
Fuel consumption city
13L/100 km18.1mpg US21.7mpg UK
17.2L/100 km13.7mpg US16.4mpg UK
Fuel consumption highway
7L/100 km33.6mpg US40.4mpg UK
8.6L/100 km27.4mpg US32.8mpg UK
Quarter mile
13.4s
Calculated
13.7s
Calculated
Power-to-weight
206hp/t154kW/t93hp/1000 lb
Calculated
197hp/t147kW/t89hp/1000 lb
Calculated
Torque-to-weight
269Nm/t180lb-ft/ton
Calculated
266Nm/t178lb-ft/ton
Calculated
Estimated range
576km358mi
Calculated
598km372mi
Calculated
Displacement
2,979cc182cu in
4,398cc268cu in
Length
4,360mm172in
4,820mm190in
Width
1,748mm69in
1,855mm73in
Height
1,408mm55in
1,373mm54in
Wheelbase
2,660mm105in
2,780mm109in
Front track
1,470mm58in
1,558mm61in
Rear track
1,497mm59in
1,592mm63in
Ground clearance
132mm5in
-
Trunk volume
370L
450L
Doors
2
2
Seats
4
4
Fuel tank
53L
70L
CO2 emissions-
283g/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 Coupe (E82) 135iBMW 6 Series (E63) 645CiPowerTorque
  • BMW 1 Series Coupe (E82) 135i: Power / Torque
  • BMW 6 Series (E63) 645Ci: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
BMW1 Series Coupe (E82)135i5,800 rpm1,300-5,000 rpm6,050 rpm
BMW6 Series (E63)645Ci6,100 rpm3,600 rpm6,350 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricBMW1 Series Coupe (E82)135iBMW6 Series (E63)645Ci
Acceleration checkpoints
0-60 mph
0-97 km/h
5.0 s
5.3 s
0-100 km/h
0-62 mph
5.3 s
5.6 s
0-200 km/h
0-124 mph
18.6 s
19.6 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Limited
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Likely limited
Drag race simulation
60 ft
18 m
2.2 s
2.3 s
330 ft
101 m
5.9 s
6.0 s
1/8 mile
201 m
8.8 s
9.0 s
1000 ft
305 m
11.3 s
11.6 s
1/4 mile
402 m
13.4 s
13.7 s
Trap speed
1/4 mile
402 m
173 km/h
108 mph
170 km/h
106 mph

Power comparison

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

Chart data table
VehicleValue
BMW1 Series Coupe (E82)135i
306 hp
228 kW
BMW6 Series (E63)645Ci
333 hp
248 kW

BMW 6 Series (E63) 645Ci has 27 hp more than BMW 1 Series Coupe (E82) 135i.

The biggest power difference is between BMW 1 Series Coupe (E82) 135i and BMW 6 Series (E63) 645Ci: 27 hp (20 kW).

Torque comparison

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

Chart data table
VehicleValue
BMW1 Series Coupe (E82)135i
400 Nm
295 lb-ft
BMW6 Series (E63)645Ci
450 Nm
332 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
BMW1 Series Coupe (E82)135i
1,485 kg
3,274 lb
BMW6 Series (E63)645Ci
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 Coupe (E82)135i
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
BMW6 Series (E63)645Ci
Unrestricted
265 km/h165 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 Coupe (E82)135i5.3 s
BMW6 Series (E63)645Ci5.6 s

Although BMW 6 Series (E63) 645Ci has more power, BMW 1 Series Coupe (E82) 135i is quicker from 0-100 km/h.

The biggest 0-100 km/h difference is between BMW 1 Series Coupe (E82) 135i and BMW 6 Series (E63) 645Ci: 0.3 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 Coupe (E82)135i
9.2 L/100 km
25.6 mpg US
30.7 mpg UK
BMW6 Series (E63)645Ci
11.7 L/100 km
20.1 mpg US
24.1 mpg UK

The biggest fuel consumption difference is between BMW 1 Series Coupe (E82) 135i and BMW 6 Series (E63) 645Ci: 2.5 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 Coupe (E82)135i
206 hp/t
154 kW/t
4.9 kg/hp
BMW6 Series (E63)645Ci
197 hp/t
147 kW/t
5.1 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
BMW1 Series Coupe (E82)135i
576 km
358 mi
BMW6 Series (E63)645Ci
598 km
372 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
BMW1 Series Coupe (E82)135i
306 hp
228 kW
5.3 s
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
BMW6 Series (E63)645Ci
333 hp
248 kW
5.6 s
Unrestricted
265 km/h165 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 Coupe (E82)135i
Power
306 hp
228 kW
0-100 km/h5.3 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Doors/seats
2 doors
4 seats
Trunk
370 L
13.1 cu ft
Length
4,360 mm
171.7 in
Height
1,408 mm
55.4 in
BMW6 Series (E63)645Ci
Power
333 hp
248 kW
0-100 km/h5.6 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Doors/seats
2 doors
4 seats
Trunk
450 L
15.9 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 Coupe (E82)135i
Power
306 hp
228 kW
0-100 km/h5.3 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
9.2 L/100 km
25.6 mpg US
30.7 mpg UK
BMW6 Series (E63)645Ci
Power
333 hp
248 kW
0-100 km/h5.6 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
11.7 L/100 km
20.1 mpg US
24.1 mpg UK

BMW 1 Series Coupe (E82) 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 Coupe (E82)135i
9.2 L/100 km
25.6 mpg US
30.7 mpg UK
5.3 s
BMW6 Series (E63)645Ci
11.7 L/100 km
20.1 mpg US
24.1 mpg UK
5.6 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 Coupe (E82)135i
206 hp/t
154 kW/t
4.9 kg/hp
9.2 L/100 km
25.6 mpg US
30.7 mpg UK
BMW6 Series (E63)645Ci
197 hp/t
147 kW/t
5.1 kg/hp
11.7 L/100 km
20.1 mpg US
24.1 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleBMW1 Series Coupe (E82)135iBMW6 Series (E63)645Ci
Power
306 hp
228 kW
333 hp
248 kW
Torque
400 Nm
295 lb-ft
450 Nm
332 lb-ft
Acceleration
5.3 s
5.6 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Lightness
1,485 kg
3,274 lb
1,690 kg
3,726 lb
Fuel consumption
9.2 L/100 km
25.6 mpg US
30.7 mpg UK
11.7 L/100 km
20.1 mpg US
24.1 mpg UK
Practicality
Doors/seats
2 doors
4 seats
Trunk
370 L
13.1 cu ft
Length
4,360 mm
171.7 in
Height
1,408 mm
55.4 in
Doors/seats
2 doors
4 seats
Trunk
450 L
15.9 cu ft
Length
4,820 mm
189.8 in
Height
1,373 mm
54.1 in
Range score
576 km
358 mi
598 km
372 mi
CO2 score
-
283 g/km
Trunk score
370 L
13.1 cu ft
450 L
15.9 cu ft
Power-to-weight score
206 hp/t
154 kW/t
4.9 kg/hp
197 hp/t
147 kW/t
5.1 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 Coupe (E82) 135iBMW 6 Series (E63) 645Ci
Consumption9.2 L/100 km25.6 mpg US30.7 mpg UK11.7 L/100 km20.1 mpg US24.1 mpg UK
Cost / 100 km16.10 LC100 km20.47 LC100 km
Cost / 100 mi25.91 LC100 mi32.95 LC100 mi
Annual fuel used1,380 L365 US gal304 UK gal1,755 L464 US gal386 UK gal
Annual fuel cost2,415 LC/year3,071 LC/year

Head-to-head comparisons

BMW 1 Series Coupe (E82) 135i

  • Is 205 kg lighter
  • Is 0.3 s quicker from 0-100 km/h
  • Uses 2.5 L/100 km less fuel
  • Has 9 hp/t better power-to-weight

Pros

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

Cons

  • Lowest power
  • Smallest trunk

BMW 6 Series (E63) 645Ci

  • Has 27 hp more
  • Has 50 Nm more
  • Has 22 km (14 mi) more estimated range
  • Has 80 L more trunk volume

Pros

  • Most powerful
  • Highest torque
  • Best estimated range
  • Largest trunk

Cons

  • Slowest 0-100 km/h
  • Highest combined fuel consumption
  • Heaviest

Choose cars to compare

Brand
Model
Generation
Engine or modification
BMW 1 Series Coupe (E82) 135i
BMW 6 Series (E63) 645Ci
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BMW 1 Series Coupe (E82) 135i vs BMW 6 Series (E63) 645Ci - car comparison - FastVsFaster