2003 BMW 645 vs. 2004 Mazda 3
To start off, 2004 Mazda 3 is newer by 1 year(s). Which means there will be less support and parts availability for 2003 BMW 645. In addition, the cost of maintenance, including insurance, on 2003 BMW 645 would be higher. At 4,398 cc (8 cylinders), 2003 BMW 645 is equipped with a bigger engine. In terms of performance, 2003 BMW 645 (321 HP @ 6100 RPM) has 161 more horse power than 2004 Mazda 3. (160 HP @ 4000 RPM). In normal driving conditions, 2003 BMW 645 should accelerate faster than 2004 Mazda 3. With that said, vehicle weight also plays an important factor in acceleration. 2003 BMW 645 weights approximately 613 kg more than 2004 Mazda 3. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2003 BMW 645 is rear wheel drive (RWD), it offers better handling in dry conditions; in addition, if you are looking to drift, it will be much easier to do with 2003 BMW 645. However, in wet, icy, snow, or gravel driving conditions, 2004 Mazda 3, being front wheel drive (FWD), will offer much better control with better grip. 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, 2003 BMW 645 (450 Nm) has 247 more torque (in Nm) than 2004 Mazda 3. (203 Nm). This means 2003 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 2004 Mazda 3.
Compare all specifications:
| 2003 BMW 645 | 2004 Mazda 3 | |
| Make | BMW | Mazda |
| Model | 645 | 3 |
| Year Released | 2003 | 2004 |
| Body Type | Convertible | Sedan |
| Engine Position | Front | Front |
| Engine Size | 4398 cc | 2260 cc |
| Engine Cylinders | 8 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 321 HP | 160 HP |
| Engine RPM | 6100 RPM | 4000 RPM |
| Torque | 450 Nm | 203 Nm |
| Engine Bore Size | 92 mm | 87 mm |
| Engine Stroke Size | 82.7 mm | 94 mm |
| Engine Compression Ratio | 10.5:1 | 9.7:1 |
| Drive Type | Rear | Front |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1895 kg | 1282 kg |
| Vehicle Length | 4830 mm | 4550 mm |
| Vehicle Width | 1860 mm | 1760 mm |
| Vehicle Height | 1380 mm | 1470 mm |
| Wheelbase Size | 2790 mm | 2650 mm |
| Fuel Consumption Highway | 8.5 L/100km | 7.4 L/100km |
| Fuel Consumption City | 16.8 L/100km | 9.4 L/100km |
| Fuel Consumption Overall | 11.5 L/100km | 8.4 L/100km |
| Fuel Tank Capacity | 70 L | 55 L |
