2005 Mazda 6 vs. 2006 BMW 645
To start off, 2006 BMW 645 is newer by 1 year(s). Which means there will be less support and parts availability for 2005 Mazda 6. In addition, the cost of maintenance, including insurance, on 2005 Mazda 6 would be higher. At 4,398 cc (8 cylinders), 2006 BMW 645 is equipped with a bigger engine. In terms of performance, 2006 BMW 645 (328 HP @ 6100 RPM) has 209 more horse power than 2005 Mazda 6. (119 HP @ 3500 RPM) In normal driving conditions, 2006 BMW 645 should accelerate faster than 2005 Mazda 6. With that said, vehicle weight also plays an important factor in acceleration. 2006 BMW 645 weights approximately 327 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 2006 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 2006 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, 2006 BMW 645 (450 Nm @ 3600 RPM) has 127 more torque (in Nm) than 2005 Mazda 6. (323 Nm @ 2000 RPM). This means 2006 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 2005 Mazda 6. 2006 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. 2006 BMW 645 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2005 Mazda 6 | 2006 BMW 645 | |
| Make | Mazda | BMW |
| Model | 6 | 645 |
| Year Released | 2005 | 2006 |
| Body Type | Sedan | Convertible |
| Engine Position | Front | Front |
| Engine Size | 1998 cc | 4398 cc |
| Engine Cylinders | 4 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 119 HP | 328 HP |
| Engine RPM | 3500 RPM | 6100 RPM |
| Torque | 323 Nm | 450 Nm |
| Torque RPM | 2000 RPM | 3600 RPM |
| Engine Bore Size | 86 mm | 92 mm |
| Engine Stroke Size | 86 mm | 82.7 mm |
| Engine Compression Ratio | 18.0:1 | 10.0:1 |
| Fuel Type | Diesel | Gasoline - Premium |
| Top Speed | 198 km/hour | 250 km/hour |
| Acceleration 0-100mph | 10.8 seconds | 6.4 seconds |
| Drive Type | Front | Rear |
| Transmission Type | Manual | Automatic |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1488 kg | 1815 kg |
| Vehicle Length | 4690 mm | 4830 mm |
| Vehicle Width | 1790 mm | 1860 mm |
| Vehicle Height | 1490 mm | 1380 mm |
| Wheelbase Size | 2630 mm | 2790 mm |
| Fuel Consumption Overall | 6.5 L/100km | 12.8 L/100km |
| Fuel Tank Capacity | 64 L | 70 L |
