2008 BMW 545 vs. 2005 Fiat Siena
To start off, 2008 BMW 545 is newer by 3 year(s). Which means there will be less support and parts availability for 2005 Fiat Siena. In addition, the cost of maintenance, including insurance, on 2005 Fiat Siena would be higher. At 4,397 cc (8 cylinders), 2008 BMW 545 is equipped with a bigger engine. In terms of performance, 2008 BMW 545 (328 HP @ 6100 RPM) has 204 more horse power than 2005 Fiat Siena. (124 HP @ 4000 RPM). In normal driving conditions, 2008 BMW 545 should accelerate faster than 2005 Fiat Siena. With that said, vehicle weight also plays an important factor in acceleration. 2008 BMW 545 weights approximately 610 kg more than 2005 Fiat Siena. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2008 BMW 545 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 2008 BMW 545. However, in wet, icy, snow, or gravel driving conditions, 2005 Fiat Siena, 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, 2008 BMW 545 (450 Nm @ 3600 RPM) has 310 more torque (in Nm) than 2005 Fiat Siena. (140 Nm @ 4000 RPM). This means 2008 BMW 545 will have an easier job in driving up hills or pulling heavy equipment than 2005 Fiat Siena.
Compare all specifications:
| 2008 BMW 545 | 2005 Fiat Siena | |
| Make | BMW | Fiat |
| Model | 545 | Siena |
| Year Released | 2008 | 2005 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 4397 cc | 1585 cc |
| Engine Cylinders | 8 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 328 HP | 124 HP |
| Engine RPM | 6100 RPM | 4000 RPM |
| Torque | 450 Nm | 140 Nm |
| Torque RPM | 3600 RPM | 4000 RPM |
| Engine Bore Size | 92 mm | 86.4 mm |
| Engine Stroke Size | 82.7 mm | 67.4 mm |
| Drive Type | Rear | Front |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1705 kg | 1095 kg |
| Wheelbase Size | 2890 mm | 2450 mm |
| Fuel Tank Capacity | 70 L | 47 L |
