2003 BMW 645 vs. 2005 Mazda 6
To start off, 2005 Mazda 6 is newer by 2 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 (310 HP @ 6000 RPM) has 191 more horse power than 2005 Mazda 6. (119 HP @ 3500 RPM). In normal driving conditions, 2003 BMW 645 should accelerate faster than 2005 Mazda 6. With that said, vehicle weight also plays an important factor in acceleration. 2003 BMW 645 weights approximately 210 kg more than 2005 Mazda 6. 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, 2005 Mazda 6, 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 @ 3600 RPM) has 127 more torque (in Nm) than 2005 Mazda 6. (323 Nm @ 2000 RPM). This means 2003 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 2005 Mazda 6. 2003 BMW 645 has automatic transmission and 2005 Mazda 6 has manual transmission. 2005 Mazda 6 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2003 BMW 645 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2003 BMW 645 | 2005 Mazda 6 | |
| Make | BMW | Mazda |
| Model | 645 | 6 |
| Year Released | 2003 | 2005 |
| Body Type | Coupe | Sedan |
| Engine Position | Front | Front |
| Engine Size | 4398 cc | 1998 cc |
| Engine Cylinders | 8 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 310 HP | 119 HP |
| Engine RPM | 6000 RPM | 3500 RPM |
| Torque | 450 Nm | 323 Nm |
| Torque RPM | 3600 RPM | 2000 RPM |
| Engine Bore Size | 92 mm | 86 mm |
| Engine Stroke Size | 82.7 mm | 86 mm |
| Engine Compression Ratio | 10.5:1 | 18.0:1 |
| Top Speed | 250 km/hour | 198 km/hour |
| Acceleration 0-100mph | 5.9 seconds | 10.8 seconds |
| Drive Type | Rear | Front |
| Transmission Type | Automatic | Manual |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1698 kg | 1488 kg |
| Vehicle Length | 4830 mm | 4690 mm |
| Vehicle Width | 1860 mm | 1790 mm |
| Vehicle Height | 1380 mm | 1490 mm |
| Wheelbase Size | 2790 mm | 2630 mm |
| Fuel Consumption Overall | 10.9 L/100km | 6.5 L/100km |
| Fuel Tank Capacity | 70 L | 64 L |
