2009 Daihatsu Sirion vs. 2003 Opel Vectra
To start off, 2009 Daihatsu Sirion is newer by 6 year(s). Which means there will be less support and parts availability for 2003 Opel Vectra. In addition, the cost of maintenance, including insurance, on 2003 Opel Vectra would be higher. At 1,794 cc (4 cylinders), 2003 Opel Vectra is equipped with a bigger engine. In terms of performance, 2003 Opel Vectra (120 HP @ 5400 RPM) has 30 more horse power than 2009 Daihatsu Sirion. (90 HP @ 6000 RPM) In normal driving conditions, 2003 Opel Vectra should accelerate faster than 2009 Daihatsu Sirion. With that said, vehicle weight also plays an important factor in acceleration. 2003 Opel Vectra weights approximately 490 kg more than 2009 Daihatsu Sirion. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2009 Daihatsu Sirion is four wheel drive (4WD), it will have significant more traction and grip than 2003 Opel Vectra. In wet, icy, snow, or gravel driving conditions, 2009 Daihatsu Sirion 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, 2003 Opel Vectra (167 Nm @ 3800 RPM) has 47 more torque (in Nm) than 2009 Daihatsu Sirion. (120 Nm @ 4400 RPM). This means 2003 Opel Vectra will have an easier job in driving up hills or pulling heavy equipment than 2009 Daihatsu Sirion.
Compare all specifications:
| 2009 Daihatsu Sirion | 2003 Opel Vectra | |
| Make | Daihatsu | Opel |
| Model | Sirion | Vectra |
| Year Released | 2009 | 2003 |
| Engine Position | Front | Front |
| Engine Size | 1298 cc | 1794 cc |
| Engine Cylinders | 4 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 90 HP | 120 HP |
| Engine RPM | 6000 RPM | 5400 RPM |
| Torque | 120 Nm | 167 Nm |
| Torque RPM | 4400 RPM | 3800 RPM |
| Engine Bore Size | 72 mm | 80.5 mm |
| Engine Stroke Size | 79.7 mm | 88.2 mm |
| Fuel Type | Gasoline - Premium | Gasoline |
| Drive Type | 4WD | Front |
| Number of Seats | 5 seats | 5 seats |
| Vehicle Weight | 980 kg | 1470 kg |
| Vehicle Length | 3610 mm | 4830 mm |
| Vehicle Width | 1670 mm | 1800 mm |
| Vehicle Height | 1560 mm | 1510 mm |
