2003 Fiat Siena vs. 2008 Opel Vectra
To start off, 2008 Opel Vectra is newer by 5 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 1,998 cc (4 cylinders), 2008 Opel Vectra is equipped with a bigger engine. In terms of performance, 2008 Opel Vectra (173 HP @ 5500 RPM) has 104 more horse power than 2003 Fiat Siena. (69 HP @ 4500 RPM) In normal driving conditions, 2008 Opel Vectra should accelerate faster than 2003 Fiat Siena. With that said, vehicle weight also plays an important factor in acceleration. 2008 Opel Vectra weights approximately 385 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.
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, 2008 Opel Vectra (265 Nm @ 2500 RPM) has 137 more torque (in Nm) than 2003 Fiat Siena. (128 Nm @ 2500 RPM). This means 2008 Opel Vectra will have an easier job in driving up hills or pulling heavy equipment than 2003 Fiat Siena.
Compare all specifications:
| 2003 Fiat Siena | 2008 Opel Vectra | |
| Make | Fiat | Opel |
| Model | Siena | Vectra |
| Year Released | 2003 | 2008 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 1747 cc | 1998 cc |
| Engine Cylinders | 4 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 69 HP | 173 HP |
| Engine RPM | 4500 RPM | 5500 RPM |
| Torque | 128 Nm | 265 Nm |
| Torque RPM | 2500 RPM | 2500 RPM |
| Engine Bore Size | 82.7 mm | 86 mm |
| Engine Stroke Size | 79.2 mm | 86 mm |
| Engine Compression Ratio | 20.3:1 | 9.5:1 |
| Fuel Type | Diesel | Gasoline - Premium |
| Drive Type | Front | Front |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1100 kg | 1485 kg |
| Vehicle Length | 4110 mm | 4600 mm |
| Vehicle Width | 1630 mm | 1800 mm |
| Vehicle Height | 1470 mm | 1470 mm |
| Wheelbase Size | 2380 mm | 2710 mm |
