2002 BMW Z3 vs. 2005 BMW 645
To start off, 2005 BMW 645 is newer by 3 year(s). Which means there will be less support and parts availability for 2002 BMW Z3. In addition, the cost of maintenance, including insurance, on 2002 BMW Z3 would be higher. At 4,390 cc (8 cylinders), 2005 BMW 645 is equipped with a bigger engine. In terms of performance, 2005 BMW 645 (338 HP @ 6100 RPM) has 110 more horse power than 2002 BMW Z3. (228 HP @ 5900 RPM) In normal driving conditions, 2005 BMW 645 should accelerate faster than 2002 BMW Z3. With that said, vehicle weight also plays an important factor in acceleration. 2005 BMW 645 weights approximately 315 kg more than 2002 BMW Z3. 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, 2005 BMW 645 (439 Nm @ 3600 RPM) has 138 more torque (in Nm) than 2002 BMW Z3. (301 Nm @ 3500 RPM). This means 2005 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 2002 BMW Z3.
Compare all specifications:
| 2002 BMW Z3 | 2005 BMW 645 | |
| Make | BMW | BMW |
| Model | Z3 | 645 |
| Year Released | 2002 | 2005 |
| Body Type | Convertible | Coupe |
| Engine Position | Front | Front |
| Engine Size | 2996 cc | 4390 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Horse Power | 228 HP | 338 HP |
| Engine RPM | 5900 RPM | 6100 RPM |
| Torque | 301 Nm | 439 Nm |
| Torque RPM | 3500 RPM | 3600 RPM |
| Engine Bore Size | 84 mm | 92 mm |
| Engine Stroke Size | 89.6 mm | 83 mm |
| Fuel Type | Gasoline | Gasoline - Premium |
| Top Speed | 236 km/hour | 250 km/hour |
| Acceleration 0-100mph | 6.3 seconds | 5.6 seconds |
| Drive Type | Rear | Rear |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 2 seats | 4 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1400 kg | 1715 kg |
| Vehicle Length | 4060 mm | 4830 mm |
| Vehicle Width | 1750 mm | 1860 mm |
| Vehicle Height | 1300 mm | 1380 mm |
| Wheelbase Size | 2450 mm | 2790 mm |
| Fuel Tank Capacity | 51 L | 70 L |
