2008 BMW Z4 vs. 2006 BMW 645
To start off, 2008 BMW Z4 is newer by 2 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, both vehicles can yield 328 horse power. So under normal driving conditions, the acceleration of both vehicles should be relatively similar. With that said, vehicle weight also plays an important factor in acceleration. 2006 BMW 645 weights approximately 526 kg more than 2008 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 2008 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 2008 BMW Z4. 2008 BMW Z4 has automatic transmission and 2006 BMW 645 has manual transmission. 2006 BMW 645 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2008 BMW Z4 will be easier to drive especially in heavy traffic.
Compare all specifications:
2008 BMW Z4 | 2006 BMW 645 | |
Make | BMW | BMW |
Model | Z4 | 645 |
Year Released | 2008 | 2006 |
Body Type | Convertible | Convertible |
Engine Position | Front | Front |
Engine Size | 2996 cc | 4398 cc |
Engine Cylinders | 6 cylinders | 8 cylinders |
Engine Type | in-line | V |
Valves per Cylinder | 4 valves | 2 valves |
Horse Power | 328 HP | 328 HP |
Engine RPM | 7900 RPM | 6100 RPM |
Torque | 315 Nm | 450 Nm |
Torque RPM | 2750 RPM | 3600 RPM |
Fuel Type | Gasoline | Gasoline |
Top Speed | 239 km/hour | 250 km/hour |
Acceleration 0-100mph | 6.2 seconds | 6.1 seconds |
Drive Type | Rear | Rear |
Transmission Type | Automatic | Manual |
Number of Seats | 2 seats | 4 seats |
Number of Doors | 2 doors | 2 doors |
Vehicle Weight | 1310 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 | 9.5 L/100km | 12.8 L/100km |
Fuel Tank Capacity | 55 L | 70 L |