2003 Fiat Siena vs. 2007 Opel Vectra
To start off, 2007 Opel Vectra is newer by 4 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 2,792 cc (6 cylinders), 2007 Opel Vectra is equipped with a bigger engine. In terms of performance, 2007 Opel Vectra (276 HP @ 5500 RPM) has 206 more horse power than 2003 Fiat Siena. (70 HP @ 5750 RPM) In normal driving conditions, 2007 Opel Vectra should accelerate faster than 2003 Fiat Siena. With that said, vehicle weight also plays an important factor in acceleration. 2007 Opel Vectra weights approximately 560 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, 2007 Opel Vectra (355 Nm @ 1800 RPM) has 260 more torque (in Nm) than 2003 Fiat Siena. (95 Nm @ 4000 RPM). This means 2007 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 | 2007 Opel Vectra | |
| Make | Fiat | Opel |
| Model | Siena | Vectra |
| Year Released | 2003 | 2007 |
| Engine Position | Front | Front |
| Engine Size | 999 cc | 2792 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | V |
| Horse Power | 70 HP | 276 HP |
| Engine RPM | 5750 RPM | 5500 RPM |
| Torque | 95 Nm | 355 Nm |
| Torque RPM | 4000 RPM | 1800 RPM |
| Fuel Type | Gasoline | Gasoline - Premium |
| Drive Type | Front | Front |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Weight | 1020 kg | 1580 kg |
| Vehicle Length | 4110 mm | 4620 mm |
| Vehicle Width | 1630 mm | 1800 mm |
| Vehicle Height | 1470 mm | 1460 mm |
| Wheelbase Size | 2380 mm | 2710 mm |
