2001 Proton 400 vs. 2003 Proton Impian
To start off, 2003 Proton Impian is newer by 2 year(s). Which means there will be less support and parts availability for 2001 Proton 400. In addition, the cost of maintenance, including insurance, on 2001 Proton 400 would be higher. At 1,584 cc (4 cylinders), 2003 Proton Impian is equipped with a bigger engine. In terms of performance, 2003 Proton Impian (101 HP @ 6000 RPM) has 27 more horse power than 2001 Proton 400. (74 HP @ 6000 RPM) In normal driving conditions, 2003 Proton Impian should accelerate faster than 2001 Proton 400. With that said, vehicle weight also plays an important factor in acceleration. 2003 Proton Impian weights approximately 235 kg more than 2001 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 Proton Impian (140 Nm @ 2750 RPM) has 32 more torque (in Nm) than 2001 Proton 400. (108 Nm @ 3000 RPM). This means 2003 Proton Impian will have an easier job in driving up hills or pulling heavy equipment than 2001 Proton 400.
Compare all specifications:
| 2001 Proton 400 | 2003 Proton Impian | |
| Make | Proton | Proton |
| Model | 400 | Impian |
| Year Released | 2001 | 2003 |
| Engine Size | 1298 cc | 1584 cc |
| Engine Cylinders | 4 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 3 valves | 4 valves |
| Horse Power | 74 HP | 101 HP |
| Engine RPM | 6000 RPM | 6000 RPM |
| Torque | 108 Nm | 140 Nm |
| Torque RPM | 3000 RPM | 2750 RPM |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Front | Front |
| Transmission Type | Manual | Manual |
| Vehicle Weight | 970 kg | 1205 kg |
| Vehicle Length | 4370 mm | 4470 mm |
| Vehicle Width | 1700 mm | 1750 mm |
| Vehicle Height | 1390 mm | 1430 mm |
| Wheelbase Size | 2510 mm | 2610 mm |
