2006 BMW 645 vs. 2001 BMW Z8
To start off, 2006 BMW 645 is newer by 5 year(s). Which means there will be less support and parts availability for 2001 BMW Z8. In addition, the cost of maintenance, including insurance, on 2001 BMW Z8 would be higher. At 4,939 cc (8 cylinders), 2001 BMW Z8 is equipped with a bigger engine. In terms of performance, 2001 BMW Z8 (400 HP @ 6600 RPM) has 72 more horse power than 2006 BMW 645. (328 HP @ 6100 RPM) In normal driving conditions, 2001 BMW Z8 should accelerate faster than 2006 BMW 645. With that said, vehicle weight also plays an important factor in acceleration. 2006 BMW 645 weights approximately 251 kg more than 2001 BMW Z8.
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, 2001 BMW Z8 (500 Nm @ 3800 RPM) has 50 more torque (in Nm) than 2006 BMW 645. (450 Nm @ 3600 RPM). This means 2001 BMW Z8 will have an easier job in driving up hills or pulling heavy equipment than 2006 BMW 645.
Compare all specifications:
| 2006 BMW 645 | 2001 BMW Z8 | |
| Make | BMW | BMW |
| Model | 645 | Z8 |
| Year Released | 2006 | 2001 |
| Body Type | Convertible | Convertible |
| Engine Position | Front | Front |
| Engine Size | 4398 cc | 4939 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 328 HP | 400 HP |
| Engine RPM | 6100 RPM | 6600 RPM |
| Torque | 450 Nm | 500 Nm |
| Torque RPM | 3600 RPM | 3800 RPM |
| Engine Bore Size | 92 mm | 94 mm |
| Engine Stroke Size | 83 mm | 89 mm |
| Engine Compression Ratio | 10.0:1 | 11.0:1 |
| Fuel Type | Gasoline | Gasoline |
| Top Speed | 250 km/hour | 250 km/hour |
| Acceleration 0-100mph | 6.1 seconds | 4.7 seconds |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 4 seats | 2 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1836 kg | 1585 kg |
| Vehicle Length | 4830 mm | 4410 mm |
| Vehicle Width | 1860 mm | 1840 mm |
| Vehicle Height | 1380 mm | 1320 mm |
| Wheelbase Size | 2790 mm | 2580 mm |
| Fuel Consumption Overall | 12.8 L/100km | 14.5 L/100km |
| Fuel Tank Capacity | 70 L | 73 L |
