2006 Fiat Siena vs. 2007 Opel Astra
To start off, 2007 Opel Astra is newer by 1 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 1,796 cc (4 cylinders), 2007 Opel Astra is equipped with a bigger engine. In terms of performance, 2007 Opel Astra (123 HP @ 5600 RPM) has 51 more horse power than 2006 Fiat Siena. (72 HP @ 6000 RPM) In normal driving conditions, 2007 Opel Astra should accelerate faster than 2006 Fiat Siena. With that said, vehicle weight also plays an important factor in acceleration. 2007 Opel Astra weights approximately 114 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.
Both vehicles are front wheel drive (FWD). Which offers better traction when its slippery than rear wheel drive vehicles. 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, 2007 Opel Astra (170 Nm @ 3800 RPM) has 68 more torque (in Nm) than 2006 Fiat Siena. (102 Nm @ 3250 RPM). This means 2007 Opel Astra will have an easier job in driving up hills or pulling heavy equipment than 2006 Fiat Siena.
Compare all specifications:
| 2006 Fiat Siena | 2007 Opel Astra | |
| Make | Fiat | Opel |
| Model | Siena | Astra |
| Year Released | 2006 | 2007 |
| Engine Position | Front | Front |
| Engine Size | 1242 cc | 1796 cc |
| Engine Cylinders | 4 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 72 HP | 123 HP |
| Engine RPM | 6000 RPM | 5600 RPM |
| Torque | 102 Nm | 170 Nm |
| Torque RPM | 3250 RPM | 3800 RPM |
| Engine Bore Size | 70.8 mm | 80.5 mm |
| Engine Stroke Size | 78.8 mm | 88.2 mm |
| Engine Compression Ratio | 9.1:1 | 10.5:1 |
| Top Speed | 164 km/hour | 198 km/hour |
| Acceleration 0-100mph | 13.5 seconds | 10.8 seconds |
| Drive Type | Front | Front |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Weight | 1170 kg | 1284 kg |
| Vehicle Length | 3830 mm | 4260 mm |
| Vehicle Width | 1640 mm | 1760 mm |
| Vehicle Height | 1440 mm | 1470 mm |
| Wheelbase Size | 2380 mm | 2620 mm |
| Fuel Consumption Overall | 7.8 L/100km | 7.7 L/100km |
| Fuel Tank Capacity | 54 L | 52 L |
