2004 BMW 525 vs. 2007 Fiat Siena
To start off, 2007 Fiat Siena is newer by 3 year(s). Which means there will be less support and parts availability for 2004 BMW 525. In addition, the cost of maintenance, including insurance, on 2004 BMW 525 would be higher. At 2,497 cc (6 cylinders), 2004 BMW 525 is equipped with a bigger engine. In terms of performance, 2004 BMW 525 (189 HP @ 4000 RPM) has 117 more horse power than 2007 Fiat Siena. (72 HP @ 6000 RPM). In normal driving conditions, 2004 BMW 525 should accelerate faster than 2007 Fiat Siena. With that said, vehicle weight also plays an important factor in acceleration. 2004 BMW 525 weights approximately 694 kg more than 2007 Fiat Siena. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2004 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 2004 BMW 525. However, in wet, icy, snow, or gravel driving conditions, 2007 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, 2004 BMW 525 (400 Nm @ 2000 RPM) has 298 more torque (in Nm) than 2007 Fiat Siena. (102 Nm @ 3250 RPM). This means 2004 BMW 525 will have an easier job in driving up hills or pulling heavy equipment than 2007 Fiat Siena. 2004 BMW 525 has automatic transmission and 2007 Fiat Siena has manual transmission. 2007 Fiat Siena will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2004 BMW 525 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2004 BMW 525 | 2007 Fiat Siena | |
| Make | BMW | Fiat |
| Model | 525 | Siena |
| Year Released | 2004 | 2007 |
| Body Type | Station Wagon | Sedan |
| Engine Position | Front | Front |
| Engine Size | 2497 cc | 1242 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 2 valves |
| Horse Power | 189 HP | 72 HP |
| Engine RPM | 4000 RPM | 6000 RPM |
| Torque | 400 Nm | 102 Nm |
| Torque RPM | 2000 RPM | 3250 RPM |
| Engine Bore Size | 84 mm | 70.9 mm |
| Engine Stroke Size | 75.1 mm | 78.9 mm |
| Engine Compression Ratio | 17.0:1 | 9.1:1 |
| Acceleration 0-100mph | 8.5 seconds | 13.5 seconds |
| Drive Type | Rear | Front |
| Transmission Type | Automatic | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 4 doors |
| Vehicle Weight | 1764 kg | 1070 kg |
| Vehicle Length | 4850 mm | 3830 mm |
| Vehicle Width | 1850 mm | 1640 mm |
| Vehicle Height | 1500 mm | 1440 mm |
| Wheelbase Size | 2890 mm | 2380 mm |
| Fuel Consumption Overall | 8 L/100km | 7.8 L/100km |
| Fuel Tank Capacity | 70 L | 54 L |
