Car comparison

BMW Z3 M 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 M Coupe (E36/8)

3.2

325 hp3246 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 Z3 M Coupe (E36/8) 3.2

  • Quickest 0-100 km/h
    5.3 s
  • Fastest top speed
    265 km/h
    165 mph Unrestricted
    250 km/h
    155 mph Restricted
  • Lightest
    1,375 kg
    3,031 lb
  • Best power-to-weight
    236 hp/t
    176 kW/t
    4.2 kg/hp
  • Lowest city consumption
    16.6 L/100 km
    14.2 mpg US
    17.0 mpg UK
  • Lowest highway consumption
    7.9 L/100 km
    29.8 mpg US
    35.8 mpg UK
  • Best performance score
    68/100

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 economy score
    75/100
  • Best practicality score
    53/100

Specification comparison

Specification comparison
ModelBMWZ3 M Coupe (E36/8)3.2BMW6 Series (E63)645Ci
Power
325hp242kW
333hp248kW
Torque
350Nm258lb-ft
450Nm332lb-ft
Curb weight
1,375kg3,031lb
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
65.0s99% 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
17.6s
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
16.6L/100 km14.2mpg US17.0mpg UK
17.2L/100 km13.7mpg US16.4mpg UK
Fuel consumption highway
7.9L/100 km29.8mpg US35.8mpg UK
8.6L/100 km27.4mpg US32.8mpg UK
Quarter mile
13.4s
Calculated
13.7s
Calculated
Power-to-weight
236hp/t176kW/t107hp/1000 lb
Calculated
197hp/t147kW/t89hp/1000 lb
Calculated
Torque-to-weight
255Nm/t170lb-ft/ton
Calculated
266Nm/t178lb-ft/ton
Calculated
Estimated range-
598km372mi
Calculated
Displacement
3,246cc198cu in
4,398cc268cu in
Length
4,025mm158in
4,820mm190in
Width
1,740mm69in
1,855mm73in
Height
1,280mm50in
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 M Coupe (E36/8) 3.2BMW 6 Series (E63) 645CiPowerTorque
  • BMW Z3 M 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 M Coupe (E36/8)3.27,400 rpm4,900 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 M 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
5.3 s
5.6 s
0-200 km/h
0-124 mph
17.6 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
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
176 km/h
110 mph
170 km/h
106 mph

Power comparison

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

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

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

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

Torque comparison

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

Chart data table
VehicleValue
BMWZ3 M 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 M Coupe (E36/8)3.2
1,375 kg
3,031 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 M 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 M Coupe (E36/8)3.25.3 s
BMW6 Series (E63)645Ci5.6 s

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

The biggest 0-100 km/h difference is between BMW Z3 M Coupe (E36/8) 3.2 and BMW 6 Series (E63) 645Ci: 0.3 s.

Power-to-weight comparison

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

Chart data table
VehicleValue
BMWZ3 M Coupe (E36/8)3.2
236 hp/t
176 kW/t
4.2 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 M Coupe (E36/8)3.2
325 hp
242 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
BMWZ3 M Coupe (E36/8)3.2
Power
325 hp
242 kW
0-100 km/h5.3 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
1,280 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 M Coupe (E36/8)3.2BMW6 Series (E63)645Ci
Power
325 hp
242 kW
333 hp
248 kW
Torque
350 Nm
258 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
1,375 kg
3,031 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
1,280 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
236 hp/t
176 kW/t
4.2 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 M Coupe (E36/8) 3.2

  • Is 315 kg lighter
  • Is 0.3 s quicker from 0-100 km/h
  • Has 39 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 8 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 M Coupe (E36/8) 3.2
BMW 6 Series (E63) 645Ci
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