2005 Fiat Siena vs. 2004 Opel Vectra
To start off, 2005 Fiat Siena is newer by 1 year(s). Which means there will be less support and parts availability for 2004 Opel Vectra. In addition, the cost of maintenance, including insurance, on 2004 Opel Vectra would be higher. At 1,796 cc (4 cylinders), 2004 Opel Vectra is equipped with a bigger engine. In terms of performance, 2005 Fiat Siena (124 HP @ 4000 RPM) has 4 more horse power than 2004 Opel Vectra. (120 HP @ 6000 RPM). In normal driving conditions, 2005 Fiat Siena should accelerate faster than 2004 Opel Vectra. With that said, vehicle weight also plays an important factor in acceleration. 2004 Opel Vectra weights approximately 280 kg more than 2005 Fiat Siena.
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, 2004 Opel Vectra (167 Nm @ 3800 RPM) has 27 more torque (in Nm) than 2005 Fiat Siena. (140 Nm @ 4000 RPM). This means 2004 Opel Vectra will have an easier job in driving up hills or pulling heavy equipment than 2005 Fiat Siena.
Compare all specifications:
| 2005 Fiat Siena | 2004 Opel Vectra | |
| Make | Fiat | Opel |
| Model | Siena | Vectra |
| Year Released | 2005 | 2004 |
| Engine Position | Front | Front |
| Engine Size | 1585 cc | 1796 cc |
| Engine Cylinders | 4 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 124 HP | 120 HP |
| Engine RPM | 4000 RPM | 6000 RPM |
| Torque | 140 Nm | 167 Nm |
| Torque RPM | 4000 RPM | 3800 RPM |
| Engine Bore Size | 86.4 mm | 80.5 mm |
| Engine Stroke Size | 67.4 mm | 88.2 mm |
| Drive Type | Front | Front |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Weight | 1095 kg | 1375 kg |
| Wheelbase Size | 2450 mm | 2640 mm |
| Fuel Tank Capacity | 47 L | 61 L |
