Car comparison

BMW Z3 Coupe (E36/8) 3.2vsBMW 6 Series (E63) 645Ci

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

New comparison

BMW Z3 Coupe (E36/8)

3.2

321 hp3201 ccGasolineRWDManualNaturally aspiratedCoupe1998-2003
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 6 Series (E63) 645Ci

  • Most powerful
    333 hp
    248 kW
  • Highest torque
    450 Nm
    332 lb-ft
  • Largest trunk
    450 L
  • Best overall score
    63/100
  • Best performance score
    68/100
  • Best economy score
    75/100
  • Best practicality score
    53/100

BMW Z3 Coupe (E36/8) 3.2

  • Quickest 0-100 km/h
    5.4 s
  • Fastest top speed
    265 km/h
    165 mph Unrestricted
    250 km/h
    155 mph Restricted
  • Lightest
    1,390 kg
    3,064 lb
  • Best power-to-weight
    231 hp/t
    172 kW/t
    4.3 kg/hp
  • Lowest city consumption
    12.9 L/100 km
    18.2 mpg US
    21.9 mpg UK
  • Lowest highway consumption
    7.4 L/100 km
    31.8 mpg US
    38.2 mpg UK

Specification comparison

Specification comparison
ModelBMWZ3 Coupe (E36/8)3.2BMW6 Series (E63)645Ci
Power
321hp239kW
333hp248kW
Torque
350Nm258lb-ft
450Nm332lb-ft
Curb weight
1,390kg3,064lb
1,690kg3,726lb
Gross weight
1,660kg3,660lb
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
66.8s99% target: 262 km/h / 163 mph
Calculated
76.8s99% target: 262 km/h / 163 mph
Calculated
0-100 km/h
5.4s
5.6s
0-200 km/h
18.0s
Calculated
19.6s
Calculated
0-60 mph
5.1s
Calculated
5.3s
Calculated
Fuel consumption-
11.7L/100 km20.1mpg US24.1mpg UK
Fuel consumption city
12.9L/100 km18.2mpg US21.9mpg UK
17.2L/100 km13.7mpg US16.4mpg UK
Fuel consumption highway
7.4L/100 km31.8mpg US38.2mpg UK
8.6L/100 km27.4mpg US32.8mpg UK
Quarter mile
13.5s
Calculated
13.7s
Calculated
Power-to-weight
231hp/t172kW/t105hp/1000 lb
Calculated
197hp/t147kW/t89hp/1000 lb
Calculated
Torque-to-weight
252Nm/t168lb-ft/ton
Calculated
266Nm/t178lb-ft/ton
Calculated
Estimated range-
598km372mi
Calculated
Displacement
3,201cc195cu in
4,398cc268cu in
Length
4,025mm158in
4,820mm190in
Width
1,740mm69in
1,855mm73in
Height
1,279mm50in
1,373mm54in
Wheelbase
2,459mm97in
2,780mm109in
Front track
1,422mm56in
1,558mm61in
Rear track
1,492mm59in
1,592mm63in
Trunk volume
210L
450L
Max trunk volume
410L
-
Doors
3
2
Seats
2
4
Fuel tank
51L
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 Z3 Coupe (E36/8) 3.2BMW 6 Series (E63) 645CiPowerTorque
  • BMW Z3 Coupe (E36/8) 3.2: Power / Torque
  • BMW 6 Series (E63) 645Ci: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
BMWZ3 Coupe (E36/8)3.27,400 rpm3,250 rpm7,650 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
MetricBMWZ3 Coupe (E36/8)3.2BMW6 Series (E63)645Ci
Acceleration checkpoints
0-60 mph
0-97 km/h
5.1 s
5.3 s
0-100 km/h
0-62 mph
5.4 s
5.6 s
0-200 km/h
0-124 mph
18.0 s
19.6 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Likely limited
Unrestricted
265 km/h165 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
8.9 s
9.0 s
1000 ft
305 m
11.4 s
11.6 s
1/4 mile
402 m
13.5 s
13.7 s
Trap speed
1/4 mile
402 m
175 km/h
109 mph
170 km/h
106 mph

Power comparison

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

Chart data table
VehicleValue
BMWZ3 Coupe (E36/8)3.2
321 hp
239 kW
BMW6 Series (E63)645Ci
333 hp
248 kW

BMW 6 Series (E63) 645Ci has 12 hp more than BMW Z3 Coupe (E36/8) 3.2.

The biggest power difference is between BMW Z3 Coupe (E36/8) 3.2 and BMW 6 Series (E63) 645Ci: 12 hp (9 kW).

Torque comparison

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

Chart data table
VehicleValue
BMWZ3 Coupe (E36/8)3.2
350 Nm
258 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
BMWZ3 Coupe (E36/8)3.2
1,390 kg
3,064 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
BMWZ3 Coupe (E36/8)3.2
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
BMWZ3 Coupe (E36/8)3.25.4 s
BMW6 Series (E63)645Ci5.6 s

Although BMW 6 Series (E63) 645Ci has more power, BMW Z3 Coupe (E36/8) 3.2 is quicker from 0-100 km/h.

The biggest 0-100 km/h difference is between BMW Z3 Coupe (E36/8) 3.2 and BMW 6 Series (E63) 645Ci: 0.2 s.

Power-to-weight comparison

Bar comparison chart for Power-to-weight. Higher is better · hp/t / kW/t

Chart data table
VehicleValue
BMWZ3 Coupe (E36/8)3.2
231 hp/t
172 kW/t
4.3 kg/hp
BMW6 Series (E63)645Ci
197 hp/t
147 kW/t
5.1 kg/hp

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
BMWZ3 Coupe (E36/8)3.2
321 hp
239 kW
5.4 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
BMWZ3 Coupe (E36/8)3.2
Power
321 hp
239 kW
0-100 km/h5.4 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Doors/seats
3 doors
2 seats
Trunk
210 L
7.4 cu ft
Length
4,025 mm
158.5 in
Height
1,279 mm
50.4 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

Detailed score breakdown

Detailed score breakdown
VehicleBMWZ3 Coupe (E36/8)3.2BMW6 Series (E63)645Ci
Power
321 hp
239 kW
333 hp
248 kW
Torque
350 Nm
258 lb-ft
450 Nm
332 lb-ft
Acceleration
5.4 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
1,390 kg
3,064 lb
1,690 kg
3,726 lb
Fuel consumption
-
11.7 L/100 km
20.1 mpg US
24.1 mpg UK
Practicality
Doors/seats
3 doors
2 seats
Trunk
210 L
7.4 cu ft
Length
4,025 mm
158.5 in
Height
1,279 mm
50.4 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
-
598 km
372 mi
CO2 score
-
283 g/km
Trunk score
210 L
7.4 cu ft
450 L
15.9 cu ft
Power-to-weight score
231 hp/t
172 kW/t
4.3 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 6 Series (E63) 645Ci
Consumption11.7 L/100 km20.1 mpg US24.1 mpg UK
Cost / 100 km20.47 LC100 km
Cost / 100 mi32.95 LC100 mi
Annual fuel used1,755 L464 US gal386 UK gal
Annual fuel cost3,071 LC/year

Head-to-head comparisons

BMW Z3 Coupe (E36/8) 3.2

  • Is 300 kg lighter
  • Is 0.2 s quicker from 0-100 km/h
  • Has 34 hp/t better power-to-weight

Pros

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

Cons

  • Lowest power
  • Smallest trunk

BMW 6 Series (E63) 645Ci

  • Has 12 hp more
  • Has 100 Nm more
  • Has 240 L more trunk volume

Pros

  • Most powerful
  • Highest torque
  • Largest trunk

Cons

  • Slowest 0-100 km/h
  • Heaviest

Choose cars to compare

Brand
Model
Generation
Engine or modification
BMW Z3 Coupe (E36/8) 3.2
BMW 6 Series (E63) 645Ci
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