2003 Opel Vectra vs. 2005 Proton 400
To start off, 2005 Proton 400 is newer by 2 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 2,958 cc (6 cylinders), 2003 Opel Vectra is equipped with a bigger engine. In terms of performance, 2003 Opel Vectra (174 HP @ 4000 RPM) has 100 more horse power than 2005 Proton 400. (74 HP @ 6000 RPM). In normal driving conditions, 2003 Opel Vectra should accelerate faster than 2005 Proton 400. With that said, vehicle weight also plays an important factor in acceleration. 2003 Opel Vectra weights approximately 774 kg more than 2005 Proton 400. 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, 2003 Opel Vectra (370 Nm @ 1900 RPM) has 262 more torque (in Nm) than 2005 Proton 400. (108 Nm @ 3000 RPM). This means 2003 Opel Vectra will have an easier job in driving up hills or pulling heavy equipment than 2005 Proton 400. 2003 Opel Vectra has automatic transmission and 2005 Proton 400 has manual transmission. 2005 Proton 400 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2003 Opel Vectra will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2003 Opel Vectra | 2005 Proton 400 | |
| Make | Opel | Proton |
| Model | Vectra | 400 |
| Year Released | 2003 | 2005 |
| Engine Position | Front | Front |
| Engine Size | 2958 cc | 1299 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 4 valves | 3 valves |
| Horse Power | 174 HP | 74 HP |
| Engine RPM | 4000 RPM | 6000 RPM |
| Torque | 370 Nm | 108 Nm |
| Torque RPM | 1900 RPM | 3000 RPM |
| Drive Type | Front | Front |
| Transmission Type | Automatic | Manual |
| Vehicle Weight | 1764 kg | 990 kg |
| Vehicle Length | 4830 mm | 4280 mm |
| Vehicle Width | 1800 mm | 1700 mm |
| Vehicle Height | 1510 mm | 1390 mm |
| Wheelbase Size | 2840 mm | 2510 mm |
