2008 BMW X5 vs. 2007 Fiat Siena
To start off, 2008 BMW X5 is newer by 1 year(s). Which means there will be less support and parts availability for 2007 Fiat Siena. In addition, the cost of maintenance, including insurance, on 2007 Fiat Siena would be higher. At 4,797 cc (8 cylinders), 2008 BMW X5 is equipped with a bigger engine. In terms of performance, 2008 BMW X5 (355 HP @ 6200 RPM) has 255 more horse power than 2007 Fiat Siena. (100 HP @ 5500 RPM). In normal driving conditions, 2008 BMW X5 should accelerate faster than 2007 Fiat Siena. With that said, vehicle weight also plays an important factor in acceleration. 2008 BMW X5 weights approximately 1130 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 2008 BMW X5 is four wheel drive (4WD), it will have significant more traction and grip than 2007 Fiat Siena. In wet, icy, snow, or gravel driving conditions, 2008 BMW X5 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, 2008 BMW X5 (490 Nm @ 3600 RPM) has 415 more torque (in Nm) than 2007 Fiat Siena. (75 Nm @ 5500 RPM). This means 2008 BMW X5 will have an easier job in driving up hills or pulling heavy equipment than 2007 Fiat Siena. 2008 BMW X5 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. 2008 BMW X5 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2008 BMW X5 | 2007 Fiat Siena | |
| Make | BMW | Fiat |
| Model | X5 | Siena |
| Year Released | 2008 | 2007 |
| Body Type | SUV | Sedan |
| Engine Position | Front | Front |
| Engine Size | 4797 cc | 1581 cc |
| Engine Cylinders | 8 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 355 HP | 100 HP |
| Engine RPM | 6200 RPM | 5500 RPM |
| Torque | 490 Nm | 75 Nm |
| Torque RPM | 3600 RPM | 5500 RPM |
| Engine Bore Size | 93 mm | 86.4 mm |
| Engine Stroke Size | 88.3 mm | 67.4 mm |
| Fuel Type | Gasoline - Premium | Gasoline |
| Top Speed | 246 km/hour | 184 km/hour |
| Acceleration 0-100mph | 6.1 seconds | 11.5 seconds |
| Drive Type | 4WD | Front |
| Transmission Type | Automatic | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 4 doors |
| Vehicle Weight | 2200 kg | 1070 kg |
| Vehicle Width | 1880 mm | 1640 mm |
| Vehicle Height | 1710 mm | 1440 mm |
| Wheelbase Size | 2830 mm | 2380 mm |
| Fuel Consumption Overall | 13.5 L/100km | 8.2 L/100km |
| Fuel Tank Capacity | 93 L | 54 L |
