2003 Proton 400 vs. 2010 Fiat Siena
To start off, 2010 Fiat Siena is newer by 7 year(s). Which means there will be less support and parts availability for 2003 Proton 400. In addition, the cost of maintenance, including insurance, on 2003 Proton 400 would be higher. At 1,581 cc (4 cylinders), 2010 Fiat Siena is equipped with a bigger engine. In terms of performance, 2010 Fiat Siena (106 HP @ 5500 RPM) has 32 more horse power than 2003 Proton 400. (74 HP @ 6000 RPM) In normal driving conditions, 2010 Fiat Siena should accelerate faster than 2003 Proton 400. With that said, vehicle weight also plays an important factor in acceleration. 2010 Fiat Siena weights approximately 105 kg more than 2003 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, 2010 Fiat Siena (140 Nm @ 4000 RPM) has 32 more torque (in Nm) than 2003 Proton 400. (108 Nm @ 3000 RPM). This means 2010 Fiat Siena will have an easier job in driving up hills or pulling heavy equipment than 2003 Proton 400.
Compare all specifications:
| 2003 Proton 400 | 2010 Fiat Siena | |
| Make | Proton | Fiat |
| Model | 400 | Siena |
| Year Released | 2003 | 2010 |
| Engine Position | Front | Front |
| Engine Size | 1297 cc | 1581 cc |
| Engine Cylinders | 4 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 3 valves | 4 valves |
| Horse Power | 74 HP | 106 HP |
| Engine RPM | 6000 RPM | 5500 RPM |
| Torque | 108 Nm | 140 Nm |
| Torque RPM | 3000 RPM | 4000 RPM |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Front | Front |
| Transmission Type | Manual | Manual |
| Vehicle Weight | 990 kg | 1095 kg |
| Vehicle Length | 4280 mm | 3550 mm |
| Vehicle Width | 1700 mm | 1640 mm |
| Vehicle Height | 1390 mm | 1490 mm |
| Wheelbase Size | 2510 mm | 2370 mm |
