2007 BMW Z4 vs. 2006 BMW 645

To start off, 2007 BMW Z4 is newer by 1 year(s). Which means there will be less support and parts availability for 2006 BMW 645. In addition, the cost of maintenance, including insurance, on 2006 BMW 645 would be higher. At 4,398 cc (8 cylinders), 2006 BMW 645 is equipped with a bigger engine. In terms of performance, 2007 BMW Z4 (335 HP @ 7900 RPM) has 7 more horse power than 2006 BMW 645. (328 HP @ 6100 RPM). In normal driving conditions, 2007 BMW Z4 should accelerate faster than 2006 BMW 645. With that said, vehicle weight also plays an important factor in acceleration. 2006 BMW 645 weights approximately 546 kg more than 2007 BMW Z4.

Both vehicles are rear wheel drive (RWD) - it offers better handling in dry conditions; in addition, if you are looking to drift, both vehicles do the job better than front wheel drive vehicles. With that said, do keep in mind that many other factors such as speed and the wear on your tires can also have significant impact on traction and control. Let's talk about torque, 2006 BMW 645 (450 Nm @ 3600 RPM) has 135 more torque (in Nm) than 2007 BMW Z4. (315 Nm @ 2750 RPM). This means 2006 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 2007 BMW Z4.

Compare all specifications:

2007 BMW Z4 2006 BMW 645
Make BMW BMW
Model Z4 645
Year Released 2007 2006
Body Type Convertible Convertible
Engine Position Front Front
Engine Size 2979 cc 4398 cc
Engine Cylinders 6 cylinders 8 cylinders
Engine Type in-line V
Valves per Cylinder 4 valves 2 valves
Horse Power 335 HP 328 HP
Engine RPM 7900 RPM 6100 RPM
Torque 315 Nm 450 Nm
Torque RPM 2750 RPM 3600 RPM
Engine Bore Size 87 mm 92 mm
Engine Stroke Size 91 mm 83 mm
Fuel Type Gasoline Gasoline
Top Speed 250 km/hour 250 km/hour
Acceleration 0-100mph 5.9 seconds 6.1 seconds
Drive Type Rear Rear
Transmission Type Manual Manual
Number of Seats 2 seats 4 seats
Number of Doors 2 doors 2 doors
Vehicle Weight 1290 kg 1836 kg
Vehicle Length 4100 mm 4830 mm
Vehicle Width 1790 mm 1860 mm
Vehicle Height 1310 mm 1380 mm
Wheelbase Size 2500 mm 2790 mm
Fuel Consumption Overall 9.1 L/100km 12.8 L/100km
Fuel Tank Capacity 55 L 70 L


 

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