2003 BMW 330 vs. 2004 BMW 645
To start off, 2004 BMW 645 is newer by 1 year(s). Which means there will be less support and parts availability for 2003 BMW 330. In addition, the cost of maintenance, including insurance, on 2003 BMW 330 would be higher. At 4,398 cc (8 cylinders), 2004 BMW 645 is equipped with a bigger engine. In terms of performance, 2004 BMW 645 (328 HP @ 6100 RPM) has 144 more horse power than 2003 BMW 330. (184 HP @ 4000 RPM) In normal driving conditions, 2004 BMW 645 should accelerate faster than 2003 BMW 330. With that said, vehicle weight also plays an important factor in acceleration. 2004 BMW 645 weights approximately 10 kg more than 2003 BMW 330. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2003 BMW 330 is four wheel drive (4WD), it will have significant more traction and grip than 2004 BMW 645. In wet, icy, snow, or gravel driving conditions, 2003 BMW 330 will offer significantly more control. 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, 2004 BMW 645 (451 Nm @ 3600 RPM) has 41 more torque (in Nm) than 2003 BMW 330. (410 Nm @ 1500 RPM). This means 2004 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 2003 BMW 330.
Compare all specifications:
| 2003 BMW 330 | 2004 BMW 645 | |
| Make | BMW | BMW |
| Model | 330 | 645 |
| Year Released | 2003 | 2004 |
| Body Type | Station Wagon | 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 | 4 valves |
| Horse Power | 184 HP | 328 HP |
| Engine RPM | 4000 RPM | 6100 RPM |
| Torque | 410 Nm | 451 Nm |
| Torque RPM | 1500 RPM | 3600 RPM |
| Engine Bore Size | 84 mm | 92 mm |
| Engine Stroke Size | 90 mm | 82.7 mm |
| Fuel Type | Diesel | Gasoline - Premium |
| Drive Type | 4WD | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 5 doors | 2 doors |
| Vehicle Weight | 1805 kg | 1815 kg |
| Vehicle Length | 4480 mm | 4830 mm |
| Vehicle Width | 1750 mm | 1860 mm |
| Vehicle Height | 1420 mm | 1380 mm |
| Wheelbase Size | 2840 mm | 2790 mm |
| Fuel Tank Capacity | 63 L | 70 L |
