2008 BMW X5 vs. 2006 Fiat Siena
To start off, 2008 BMW X5 is newer by 2 year(s). Which means there will be less support and parts availability for 2006 Fiat Siena. In addition, the cost of maintenance, including insurance, on 2006 Fiat Siena would be higher. At 3,001 cc (6 cylinders), 2008 BMW X5 is equipped with a bigger engine. In terms of performance, 2008 BMW X5 (260 HP @ 6600 RPM) has 188 more horse power than 2006 Fiat Siena. (72 HP @ 6000 RPM). In normal driving conditions, 2008 BMW X5 should accelerate faster than 2006 Fiat Siena. With that said, vehicle weight also plays an important factor in acceleration. 2008 BMW X5 weights approximately 380 kg more than 2006 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 2006 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 (305 Nm @ 2750 RPM) has 203 more torque (in Nm) than 2006 Fiat Siena. (102 Nm @ 3250 RPM). This means 2008 BMW X5 will have an easier job in driving up hills or pulling heavy equipment than 2006 Fiat Siena. 2008 BMW X5 has automatic transmission and 2006 Fiat Siena has manual transmission. 2006 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 | 2006 Fiat Siena | |
| Make | BMW | Fiat |
| Model | X5 | Siena |
| Year Released | 2008 | 2006 |
| Body Type | SUV | Sedan |
| Engine Position | Front | Front |
| Engine Size | 3001 cc | 1242 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 2 valves |
| Horse Power | 260 HP | 72 HP |
| Engine RPM | 6600 RPM | 6000 RPM |
| Torque | 305 Nm | 102 Nm |
| Torque RPM | 2750 RPM | 3250 RPM |
| Engine Compression Ratio | 10.7:1 | 9.1:1 |
| Top Speed | 209 km/hour | 164 km/hour |
| Drive Type | 4WD | Front |
| Transmission Type | Automatic | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 4 doors |
| Vehicle Weight | 1550 kg | 1170 kg |
| Vehicle Length | 4860 mm | 3830 mm |
| Vehicle Width | 1940 mm | 1640 mm |
| Vehicle Height | 1770 mm | 1440 mm |
| Wheelbase Size | 2940 mm | 2380 mm |
| Fuel Consumption Overall | 13.1 L/100km | 7.8 L/100km |
| Fuel Tank Capacity | 85 L | 54 L |
