2003 Opel Vectra vs. 2012 Daihatsu Sirion
To start off, 2012 Daihatsu Sirion is newer by 9 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 3,175 cc (6 cylinders), 2003 Opel Vectra is equipped with a bigger engine. In terms of performance, 2003 Opel Vectra (209 HP @ 6200 RPM) has 140 more horse power than 2012 Daihatsu Sirion. (69 HP @ 6000 RPM). In normal driving conditions, 2003 Opel Vectra should accelerate faster than 2012 Daihatsu Sirion.
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, 2003 Opel Vectra (300 Nm @ 4000 RPM) has 206 more torque (in Nm) than 2012 Daihatsu Sirion. (94 Nm @ 3600 RPM). This means 2003 Opel Vectra will have an easier job in driving up hills or pulling heavy equipment than 2012 Daihatsu Sirion.
Compare all specifications:
| 2003 Opel Vectra | 2012 Daihatsu Sirion | |
| Make | Opel | Daihatsu |
| Model | Vectra | Sirion |
| Year Released | 2003 | 2012 |
| Engine Position | Front | Front |
| Engine Size | 3175 cc | 998 cc |
| Engine Cylinders | 6 cylinders | 3 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 209 HP | 69 HP |
| Engine RPM | 6200 RPM | 6000 RPM |
| Torque | 300 Nm | 94 Nm |
| Torque RPM | 4000 RPM | 3600 RPM |
| Engine Bore Size | 87.5 mm | 71.1 mm |
| Engine Stroke Size | 88 mm | 84 mm |
| Engine Compression Ratio | 10.0:1 | 10.5:1 |
| Acceleration 0-100mph | 8.1 seconds | 13.9 seconds |
| Drive Type | Front | Front |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 5 doors |
