2005 Proton 400 vs. 2011 BMW 123
To start off, 2011 BMW 123 is newer by 6 year(s). Which means there will be less support and parts availability for 2005 Proton 400. In addition, the cost of maintenance, including insurance, on 2005 Proton 400 would be higher. At 1,995 cc (4 cylinders), 2011 BMW 123 is equipped with a bigger engine. In terms of performance, 2011 BMW 123 (202 HP @ 4400 RPM) has 128 more horse power than 2005 Proton 400. (74 HP @ 6000 RPM) In normal driving conditions, 2011 BMW 123 should accelerate faster than 2005 Proton 400. With that said, vehicle weight also plays an important factor in acceleration. 2011 BMW 123 weights approximately 495 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.
Because 2011 BMW 123 is rear wheel drive (RWD), it offers better handling in dry conditions; in addition, if you are looking to drift, it will be much easier to do with 2011 BMW 123. However, in wet, icy, snow, or gravel driving conditions, 2005 Proton 400, being front wheel drive (FWD), will offer much better control with better grip. 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, 2011 BMW 123 (400 Nm @ 2000 RPM) has 292 more torque (in Nm) than 2005 Proton 400. (108 Nm @ 3000 RPM). This means 2011 BMW 123 will have an easier job in driving up hills or pulling heavy equipment than 2005 Proton 400.
Compare all specifications:
| 2005 Proton 400 | 2011 BMW 123 | |
| Make | Proton | BMW |
| Model | 400 | 123 |
| Year Released | 2005 | 2011 |
| Engine Position | Front | Front |
| Engine Size | 1299 cc | 1995 cc |
| Engine Cylinders | 4 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 3 valves | 4 valves |
| Horse Power | 74 HP | 202 HP |
| Engine RPM | 6000 RPM | 4400 RPM |
| Torque | 108 Nm | 400 Nm |
| Torque RPM | 3000 RPM | 2000 RPM |
| Fuel Type | Gasoline | Diesel |
| Drive Type | Front | Rear |
| Vehicle Weight | 990 kg | 1485 kg |
| Vehicle Length | 4280 mm | 4239 mm |
| Vehicle Width | 1700 mm | 1748 mm |
| Vehicle Height | 1390 mm | 1421 mm |
| Wheelbase Size | 2510 mm | 2660 mm |
