2009 BMW 125 vs. 2011 Alpina B5
To start off, 2011 Alpina B5 is newer by 2 year(s). Which means there will be less support and parts availability for 2009 BMW 125. In addition, the cost of maintenance, including insurance, on 2009 BMW 125 would be higher. At 4,398 cc (8 cylinders), 2011 Alpina B5 is equipped with a bigger engine. In terms of performance, 2011 Alpina B5 (493 HP @ 5500 RPM) has 278 more horse power than 2009 BMW 125. (215 HP @ 6700 RPM) In normal driving conditions, 2011 Alpina B5 should accelerate faster than 2009 BMW 125. With that said, vehicle weight also plays an important factor in acceleration. 2011 Alpina B5 weights approximately 195 kg more than 2009 BMW 125. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Both vehicles are rear wheel drive (RWD) - it offers better handling in dry conditions; in addition, if you are looking to drift, both vehicles do the job better than front 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, 2011 Alpina B5 (700 Nm @ 4250 RPM) has 430 more torque (in Nm) than 2009 BMW 125. (270 Nm @ 2500 RPM). This means 2011 Alpina B5 will have an easier job in driving up hills or pulling heavy equipment than 2009 BMW 125.
Compare all specifications:
| 2009 BMW 125 | 2011 Alpina B5 | |
| Make | BMW | Alpina |
| Model | 125 | B5 |
| Year Released | 2009 | 2011 |
| Body Type | Convertible | Sedan |
| Engine Position | Front | Front |
| Engine Size | 2996 cc | 4398 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 215 HP | 493 HP |
| Engine RPM | 6700 RPM | 5500 RPM |
| Torque | 270 Nm | 700 Nm |
| Torque RPM | 2500 RPM | 4250 RPM |
| Engine Compression Ratio | 10.7:1 | 9.0:1 |
| Fuel Type | Gasoline - Premium | Gasoline - Premium |
| Top Speed | 231 km/hour | 309 km/hour |
| Acceleration 0-100mph | 7.4 seconds | 4.7 seconds |
| Drive Type | Rear | Rear |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1525 kg | 1720 kg |
| Vehicle Length | 4370 mm | 4850 mm |
| Vehicle Width | 1420 mm | 1850 mm |
| Vehicle Height | 1760 mm | 1470 mm |
| Wheelbase Size | 2670 mm | 2890 mm |
| Fuel Consumption Overall | 8.1 L/100km | 12.3 L/100km |
| Fuel Tank Capacity | 53 L | 70 L |
