2000 BMW Z9 vs. 2006 BMW 645
To start off, 2006 BMW 645 is newer by 6 year(s). Which means there will be less support and parts availability for 2000 BMW Z9. In addition, the cost of maintenance, including insurance, on 2000 BMW Z9 would be higher. Both 2000 BMW Z9 and 2006 BMW 645 are equipped with a 4,398 cc engine. In terms of performance, 2006 BMW 645 (328 HP @ 6100 RPM) has 46 more horse power than 2000 BMW Z9. (282 HP @ 5400 RPM) In normal driving conditions, 2006 BMW 645 should accelerate faster than 2000 BMW Z9.
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 10 more torque (in Nm) than 2000 BMW Z9. (440 Nm @ 3600 RPM). This means 2006 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 2000 BMW Z9.
Compare all specifications:
| 2000 BMW Z9 | 2006 BMW 645 | |
| Make | BMW | BMW |
| Model | Z9 | 645 |
| Year Released | 2000 | 2006 |
| Body Type | Convertible | Coupe |
| Engine Position | Front | Front |
| Engine Size | 4398 cc | 4398 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 282 HP | 328 HP |
| Engine RPM | 5400 RPM | 6100 RPM |
| Torque | 440 Nm | 450 Nm |
| Torque RPM | 3600 RPM | 3600 RPM |
| Engine Bore Size | 92 mm | 92 mm |
| Engine Stroke Size | 82.7 mm | 83 mm |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 2 seats | 4 seats |
| Vehicle Length | 5010 mm | 4830 mm |
| Vehicle Width | 2010 mm | 1860 mm |
| Vehicle Height | 1360 mm | 1380 mm |
| Wheelbase Size | 3110 mm | 2790 mm |
