2006 BMW 645 vs. 2004 Subaru Outback
To start off, 2006 BMW 645 is newer by 2 year(s). Which means there will be less support and parts availability for 2004 Subaru Outback. In addition, the cost of maintenance, including insurance, on 2004 Subaru Outback 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 162 more horse power than 2004 Subaru Outback. (166 HP @ 5600 RPM). In normal driving conditions, 2006 BMW 645 should accelerate faster than 2004 Subaru Outback. With that said, vehicle weight also plays an important factor in acceleration. 2006 BMW 645 weights approximately 251 kg more than 2004 Subaru Outback. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2004 Subaru Outback is four wheel drive (4WD), it will have significant more traction and grip than 2006 BMW 645. In wet, icy, snow, or gravel driving conditions, 2004 Subaru Outback 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, 2006 BMW 645 (450 Nm) has 225 more torque (in Nm) than 2004 Subaru Outback. (225 Nm). This means 2006 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 2004 Subaru Outback.
Compare all specifications:
| 2006 BMW 645 | 2004 Subaru Outback | |
| Make | BMW | Subaru |
| Model | 645 | Outback |
| Year Released | 2006 | 2004 |
| Body Type | Convertible | Sedan |
| Engine Position | Front | Front |
| Engine Size | 4398 cc | 2458 cc |
| Engine Cylinders | 8 cylinders | 4 cylinders |
| Engine Type | V | boxer |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 328 HP | 166 HP |
| Engine RPM | 6100 RPM | 5600 RPM |
| Torque | 450 Nm | 225 Nm |
| Engine Bore Size | 92 mm | 100 mm |
| Engine Stroke Size | 83 mm | 79 mm |
| Engine Compression Ratio | 10.0:1 | 10.0:1 |
| Drive Type | Rear | 4WD |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1836 kg | 1585 kg |
| Vehicle Length | 4830 mm | 4690 mm |
| Vehicle Width | 1860 mm | 1750 mm |
| Vehicle Height | 1380 mm | 1490 mm |
| Wheelbase Size | 2790 mm | 2680 mm |
| Fuel Consumption Overall | 12.8 L/100km | 9.8 L/100km |
| Fuel Tank Capacity | 70 L | 64 L |
