2005 BMW 525 vs. 2003 Fiat Siena
To start off, 2005 BMW 525 is newer by 2 year(s). Which means there will be less support and parts availability for 2003 Fiat Siena. In addition, the cost of maintenance, including insurance, on 2003 Fiat Siena would be higher. At 2,494 cc (6 cylinders), 2005 BMW 525 is equipped with a bigger engine. In terms of performance, 2005 BMW 525 (189 HP @ 6000 RPM) has 120 more horse power than 2003 Fiat Siena. (69 HP @ 4500 RPM). In normal driving conditions, 2005 BMW 525 should accelerate faster than 2003 Fiat Siena. With that said, vehicle weight also plays an important factor in acceleration. 2005 BMW 525 weights approximately 530 kg more than 2003 Fiat Siena. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2005 BMW 525 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 2005 BMW 525. However, in wet, icy, snow, or gravel driving conditions, 2003 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, 2005 BMW 525 (245 Nm @ 3500 RPM) has 117 more torque (in Nm) than 2003 Fiat Siena. (128 Nm @ 2500 RPM). This means 2005 BMW 525 will have an easier job in driving up hills or pulling heavy equipment than 2003 Fiat Siena.
Compare all specifications:
| 2005 BMW 525 | 2003 Fiat Siena | |
| Make | BMW | Fiat |
| Model | 525 | Siena |
| Year Released | 2005 | 2003 |
| Body Type | Station Wagon | Sedan |
| Engine Position | Front | Front |
| Engine Size | 2494 cc | 1747 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 189 HP | 69 HP |
| Engine RPM | 6000 RPM | 4500 RPM |
| Torque | 245 Nm | 128 Nm |
| Torque RPM | 3500 RPM | 2500 RPM |
| Engine Bore Size | 84.1 mm | 82.7 mm |
| Engine Stroke Size | 75 mm | 79.2 mm |
| Engine Compression Ratio | 11.0:1 | 20.3:1 |
| Fuel Type | Gasoline - Premium | Diesel |
| Drive Type | Rear | Front |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 4 doors |
| Vehicle Weight | 1630 kg | 1100 kg |
| Vehicle Length | 4850 mm | 4110 mm |
| Vehicle Width | 1850 mm | 1630 mm |
| Vehicle Height | 1500 mm | 1470 mm |
| Wheelbase Size | 2730 mm | 2380 mm |
