2007 BMW 320 vs. 2009 BMW 550
To start off, 2009 BMW 550 is newer by 2 year(s). Which means there will be less support and parts availability for 2007 BMW 320. In addition, the cost of maintenance, including insurance, on 2007 BMW 320 would be higher. At 4,799 cc, 2009 BMW 550 is equipped with a bigger engine. In terms of performance, 2009 BMW 550 (362 HP @ 6300 RPM) has 214 more horse power than 2007 BMW 320. (148 HP @ 6200 RPM) In normal driving conditions, 2009 BMW 550 should accelerate faster than 2007 BMW 320. With that said, vehicle weight also plays an important factor in acceleration. 2009 BMW 550 weights approximately 267 kg more than 2007 BMW 320. 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, 2009 BMW 550 (490 Nm @ 3400 RPM) has 290 more torque (in Nm) than 2007 BMW 320. (200 Nm @ 3600 RPM). This means 2009 BMW 550 will have an easier job in driving up hills or pulling heavy equipment than 2007 BMW 320.
Compare all specifications:
| 2007 BMW 320 | 2009 BMW 550 | |
| Make | BMW | BMW |
| Model | 320 | 550 |
| Year Released | 2007 | 2009 |
| Engine Position | Front | Front |
| Engine Size | 1994 cc | 4799 cc |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 148 HP | 362 HP |
| Engine RPM | 6200 RPM | 6300 RPM |
| Torque | 200 Nm | 490 Nm |
| Torque RPM | 3600 RPM | 3400 RPM |
| Engine Bore Size | 84 mm | 93 mm |
| Engine Stroke Size | 90 mm | 88.3 mm |
| Engine Compression Ratio | 10.5:1 | 10.5:1 |
| Fuel Type | Gasoline - Premium | Gasoline |
| Top Speed | 220 km/hour | 250 km/hour |
| Acceleration 0-100mph | 9 seconds | 5.9 seconds |
| Drive Type | Rear | Rear |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Weight | 1395 kg | 1662 kg |
| Vehicle Length | 4530 mm | 4850 mm |
| Vehicle Width | 1430 mm | 1470 mm |
| Vehicle Height | 1820 mm | 1850 mm |
| Wheelbase Size | 2770 mm | 2890 mm |
| Fuel Consumption Overall | 7.4 L/100km | 11.1 L/100km |
| Fuel Tank Capacity | 60 L | 70 L |
