Car comparison

BMW Z8 (E52) 4.9vsBMW 6 Series Convertible (F12) 650i

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

New comparison

BMW Z8 (E52)

4.9

400 hp4941 ccGasolineRWDManualNaturally aspiratedCabriolet / convertible2000-2005
VS

BMW 6 Series Convertible (F12)

650i

407 hp4395 ccGasolineAWDAutomaticTurbochargedCabriolet / convertible2011-2012

Comparison overview

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

Best choices

BMW 6 Series Convertible (F12) 650i

  • Most powerful
    407 hp
    304 kW
  • Highest torque
    600 Nm
    443 lb-ft
  • Lowest combined fuel consumption
    11.5 L/100 km
    20.5 mpg US
    24.6 mpg UK
  • Lowest city consumption
    16.6 L/100 km
    14.2 mpg US
    17.0 mpg UK
  • Lowest highway consumption
    8.5 L/100 km
    27.7 mpg US
    33.2 mpg UK
  • Best estimated range
    609 km
    378 mi
  • Largest trunk
    300 L
  • Best overall score
    65/100
  • Best economy score
    76/100
  • Best practicality score
    45/100

BMW Z8 (E52) 4.9

  • Quickest 0-100 km/h
    4.7 s
  • Fastest top speed
    260 km/h
    162 mph Unrestricted
    250 km/h
    155 mph Restricted
  • Lightest
    1,660 kg
    3,660 lb
  • Best power-to-weight
    241 hp/t
    180 kW/t
    4.2 kg/hp
  • Best performance score
    74/100

Specification comparison

Specification comparison
ModelBMWZ8 (E52)4.9BMW6 Series Convertible (F12)650i
Power
400hp298kW
407hp304kW
Torque
500Nm369lb-ft
600Nm443lb-ft
Curb weight
1,660kg3,660lb
1,985kg4,376lb
Gross weight
1,900kg4,189lb
2,465kg5,434lb
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
59.3s99% target: 257 km/h / 160 mph
Calculated
69.6s99% target: 257 km/h / 160 mph
Calculated
0-100 km/h
4.7s
4.9s
0-200 km/h
16.3s
Calculated
18.1s
Calculated
0-60 mph
4.5s
Calculated
4.7s
Calculated
Fuel consumption
14.5L/100 km16.2mpg US19.5mpg UK
11.5L/100 km20.5mpg US24.6mpg UK
Fuel consumption city
21.1L/100 km11.1mpg US13.4mpg UK
16.6L/100 km14.2mpg US17.0mpg UK
Fuel consumption highway
10.6L/100 km22.2mpg US26.6mpg UK
8.5L/100 km27.7mpg US33.2mpg UK
Quarter mile
12.8s
Calculated
13.1s
Calculated
Power-to-weight
241hp/t180kW/t109hp/1000 lb
Calculated
205hp/t153kW/t93hp/1000 lb
Calculated
Torque-to-weight
301Nm/t202lb-ft/ton
Calculated
302Nm/t202lb-ft/ton
Calculated
Estimated range
503km313mi
Calculated
609km378mi
Calculated
Displacement
4,941cc302cu in
4,395cc268cu in
Length
4,400mm173in
4,894mm193in
Width
1,830mm72in
1,894mm75in
Height
1,317mm52in
1,365mm54in
Wheelbase
2,505mm99in
2,855mm112in
Front track
1,550mm61in
1,600mm63in
Rear track
1,570mm62in
1,665mm66in
Ground clearance-
123mm5in
Trunk volume
203L
300L
Max trunk volume-
350L
Doors
2
2
Seats
2
4
Fuel tank
73L
70L
CO2 emissions-
267g/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 Z8 (E52) 4.9BMW 6 Series Convertible (F12) 650iPowerTorque
  • BMW Z8 (E52) 4.9: Power / Torque
  • BMW 6 Series Convertible (F12) 650i: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
BMWZ8 (E52)4.96,600 rpm3,800 rpm6,850 rpm
BMW6 Series Convertible (F12)650i5,500-6,400 rpm1,750-4,500 rpm6,650 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricBMWZ8 (E52)4.9BMW6 Series Convertible (F12)650i
Acceleration checkpoints
0-60 mph
0-97 km/h
4.5 s
4.7 s
0-100 km/h
0-62 mph
4.7 s
4.9 s
0-200 km/h
0-124 mph
16.3 s
18.1 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Likely limited
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Likely limited
Drag race simulation
60 ft
18 m
2.1 s
2.1 s
330 ft
101 m
5.6 s
5.6 s
1/8 mile
201 m
8.4 s
8.5 s
1000 ft
305 m
10.8 s
11.0 s
1/4 mile
402 m
12.8 s
13.1 s
Trap speed
1/4 mile
402 m
180 km/h
112 mph
175 km/h
109 mph

Power comparison

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

Chart data table
VehicleValue
BMWZ8 (E52)4.9
400 hp
298 kW
BMW6 Series Convertible (F12)650i
407 hp
304 kW

BMW 6 Series Convertible (F12) 650i has 7 hp more than BMW Z8 (E52) 4.9.

The biggest power difference is between BMW Z8 (E52) 4.9 and BMW 6 Series Convertible (F12) 650i: 7 hp (5 kW).

Torque comparison

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

Chart data table
VehicleValue
BMWZ8 (E52)4.9
500 Nm
369 lb-ft
BMW6 Series Convertible (F12)650i
600 Nm
443 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
BMWZ8 (E52)4.9
1,660 kg
3,660 lb
BMW6 Series Convertible (F12)650i
1,985 kg
4,376 lb

Top speed without limiter comparison

Bar comparison chart for Top speed without limiter. Higher is better · km/h / mph

Chart data table
VehicleValue
BMWZ8 (E52)4.9
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
BMW6 Series Convertible (F12)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
BMWZ8 (E52)4.94.7 s
BMW6 Series Convertible (F12)650i4.9 s

Although BMW 6 Series Convertible (F12) 650i has more power, BMW Z8 (E52) 4.9 is quicker from 0-100 km/h.

The biggest 0-100 km/h difference is between BMW Z8 (E52) 4.9 and BMW 6 Series Convertible (F12) 650i: 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
BMWZ8 (E52)4.9
14.5 L/100 km
16.2 mpg US
19.5 mpg UK
BMW6 Series Convertible (F12)650i
11.5 L/100 km
20.5 mpg US
24.6 mpg UK

The biggest fuel consumption difference is between BMW 6 Series Convertible (F12) 650i and BMW Z8 (E52) 4.9: 3.0 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
BMWZ8 (E52)4.9
241 hp/t
180 kW/t
4.1 kg/hp
BMW6 Series Convertible (F12)650i
205 hp/t
153 kW/t
4.9 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
BMWZ8 (E52)4.9
503 km
313 mi
BMW6 Series Convertible (F12)650i
609 km
378 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
BMWZ8 (E52)4.9
400 hp
298 kW
4.7 s
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
BMW6 Series Convertible (F12)650i
407 hp
304 kW
4.9 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
BMWZ8 (E52)4.9
Power
400 hp
298 kW
0-100 km/h4.7 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Doors/seats
2 doors
2 seats
Trunk
203 L
7.2 cu ft
Length
4,400 mm
173.2 in
Height
1,317 mm
51.9 in
BMW6 Series Convertible (F12)650i
Power
407 hp
304 kW
0-100 km/h4.9 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
4,894 mm
192.7 in
Height
1,365 mm
53.7 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
BMWZ8 (E52)4.9
Power
400 hp
298 kW
0-100 km/h4.7 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
14.5 L/100 km
16.2 mpg US
19.5 mpg UK
BMW6 Series Convertible (F12)650i
Power
407 hp
304 kW
0-100 km/h4.9 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
11.5 L/100 km
20.5 mpg US
24.6 mpg UK

BMW 6 Series Convertible (F12) 650i 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
BMWZ8 (E52)4.9
14.5 L/100 km
16.2 mpg US
19.5 mpg UK
4.7 s
BMW6 Series Convertible (F12)650i
11.5 L/100 km
20.5 mpg US
24.6 mpg UK
4.9 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
BMWZ8 (E52)4.9
241 hp/t
180 kW/t
4.2 kg/hp
14.5 L/100 km
16.2 mpg US
19.5 mpg UK
BMW6 Series Convertible (F12)650i
205 hp/t
153 kW/t
4.9 kg/hp
11.5 L/100 km
20.5 mpg US
24.6 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleBMWZ8 (E52)4.9BMW6 Series Convertible (F12)650i
Power
400 hp
298 kW
407 hp
304 kW
Torque
500 Nm
369 lb-ft
600 Nm
443 lb-ft
Acceleration
4.7 s
4.9 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Lightness
1,660 kg
3,660 lb
1,985 kg
4,376 lb
Fuel consumption
14.5 L/100 km
16.2 mpg US
19.5 mpg UK
11.5 L/100 km
20.5 mpg US
24.6 mpg UK
Practicality
Doors/seats
2 doors
2 seats
Trunk
203 L
7.2 cu ft
Length
4,400 mm
173.2 in
Height
1,317 mm
51.9 in
Doors/seats
2 doors
4 seats
Trunk
300 L
10.6 cu ft
Length
4,894 mm
192.7 in
Height
1,365 mm
53.7 in
Range score
503 km
313 mi
609 km
378 mi
CO2 score
-
267 g/km
Trunk score
203 L
7.2 cu ft
300 L
10.6 cu ft
Power-to-weight score
241 hp/t
180 kW/t
4.2 kg/hp
205 hp/t
153 kW/t
4.9 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 Z8 (E52) 4.9BMW 6 Series Convertible (F12) 650i
Consumption14.5 L/100 km16.2 mpg US19.5 mpg UK11.5 L/100 km20.5 mpg US24.6 mpg UK
Cost / 100 km25.38 LC100 km20.13 LC100 km
Cost / 100 mi40.84 LC100 mi32.39 LC100 mi
Annual fuel used2,175 L575 US gal478 UK gal1,725 L456 US gal379 UK gal
Annual fuel cost3,806 LC/year3,019 LC/year

Head-to-head comparisons

BMW Z8 (E52) 4.9

  • Is 325 kg lighter
  • Is 0.2 s quicker from 0-100 km/h
  • Has 36 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
  • Highest combined fuel consumption
  • Smallest trunk

BMW 6 Series Convertible (F12) 650i

  • Has 7 hp more
  • Has 100 Nm more
  • Uses 3.0 L/100 km less fuel
  • Has 105 km (65 mi) more estimated range
  • Has 97 L more trunk volume

Pros

  • Most powerful
  • Highest torque
  • Lowest combined fuel consumption
  • Best estimated range
  • Largest trunk

Cons

  • Slowest 0-100 km/h
  • Heaviest

Choose cars to compare

Brand
Model
Generation
Engine or modification
BMW Z8 (E52) 4.9
BMW 6 Series Convertible (F12) 650i
Compare selected cars
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BMW Z8 (E52) 4.9 vs BMW 6 Series Convertible (F12) 650i - car comparison - FastVsFaster