2000 BMW Z9 vs. 2007 BMW 645
To start off, 2007 BMW 645 is newer by 7 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 2007 BMW 645 are equipped with a 4,398 cc engine. In terms of performance, 2007 BMW 645 (328 HP @ 6100 RPM) has 46 more horse power than 2000 BMW Z9. (282 HP @ 5400 RPM) In normal driving conditions, 2007 BMW 645 should accelerate faster than 2000 BMW Z9. With that said, vehicle weight also plays an important factor in acceleration. 2007 BMW 645 weights approximately 4 kg more than 2000 BMW Z9. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
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, 2007 BMW 645 (450 Nm @ 3600 RPM) has 10 more torque (in Nm) than 2000 BMW Z9. (440 Nm @ 3600 RPM). This means 2007 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 | 2007 BMW 645 | |
| Make | BMW | BMW |
| Model | Z9 | 645 |
| Year Released | 2000 | 2007 |
| Body Type | Convertible | Coupe |
| Engine Position | Front | Front |
| Engine Size | 4398 cc | 4398 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Horse Power | 282 HP | 328 HP |
| Engine RPM | 5400 RPM | 6100 RPM |
| Torque | 440 Nm | 450 Nm |
| Torque RPM | 3600 RPM | 3600 RPM |
| Engine Compression Ratio | 10.0:1 | 10.0:1 |
| Drive Type | Rear | Rear |
| Number of Seats | 2 seats | 4 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1686 kg | 1690 kg |
| Vehicle Length | 4770 mm | 4830 mm |
| Vehicle Width | 1980 mm | 1860 mm |
| Vehicle Height | 1290 mm | 1380 mm |
| Wheelbase Size | 2960 mm | 2790 mm |
