2009 BMW 125 vs. 2011 BMW 550
To start off, 2011 BMW 550 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 4,400 cc (8 cylinders), 2011 BMW 550 is equipped with a bigger engine. In terms of performance, 2011 BMW 550 (400 HP @ 5500 RPM) has 185 more horse power than 2009 BMW 125. (215 HP @ 6700 RPM) In normal driving conditions, 2011 BMW 550 should accelerate faster than 2009 BMW 125. With that said, vehicle weight also plays an important factor in acceleration. 2011 BMW 550 weights approximately 525 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.
Because 2011 BMW 550 is all wheel drive (AWD), it will have significant more traction and grip than 2009 BMW 125. In wet, icy, snow, or gravel driving conditions, 2011 BMW 550 will offer significantly more control. 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 550 (609 Nm @ 1750 RPM) has 338 more torque (in Nm) than 2009 BMW 125. (271 Nm @ 2500 RPM). This means 2011 BMW 550 will have an easier job in driving up hills or pulling heavy equipment than 2009 BMW 125. 2011 BMW 550 has automatic transmission and 2009 BMW 125 has manual transmission. 2009 BMW 125 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2011 BMW 550 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2009 BMW 125 | 2011 BMW 550 | |
| Make | BMW | BMW |
| Model | 125 | 550 |
| Year Released | 2009 | 2011 |
| Body Type | Convertible | Sedan |
| Engine Position | Front | Front |
| Engine Size | 2996 cc | 4400 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 215 HP | 400 HP |
| Engine RPM | 6700 RPM | 5500 RPM |
| Torque | 271 Nm | 609 Nm |
| Torque RPM | 2500 RPM | 1750 RPM |
| Fuel Type | Gasoline - Premium | Gasoline - Premium |
| Drive Type | Rear | AWD |
| Transmission Type | Manual | Automatic |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1525 kg | 2050 kg |
| Vehicle Length | 4370 mm | 4905 mm |
| Vehicle Width | 1420 mm | 1859 mm |
| Vehicle Height | 1760 mm | 1463 mm |
| Wheelbase Size | 2670 mm | 2969 mm |
| Fuel Tank Capacity | 53 L | 70 L |
