2003 BMW 320 vs. 2007 BMW M
To start off, 2007 BMW M is newer by 4 year(s). Which means there will be less support and parts availability for 2003 BMW 320. In addition, the cost of maintenance, including insurance, on 2003 BMW 320 would be higher. At 3,245 cc (6 cylinders), 2007 BMW M is equipped with a bigger engine. In terms of performance, 2007 BMW M (330 HP @ 7900 RPM) has 189 more horse power than 2003 BMW 320. (141 HP @ 4000 RPM) In normal driving conditions, 2007 BMW M should accelerate faster than 2003 BMW 320. With that said, vehicle weight also plays an important factor in acceleration. 2003 BMW 320 weights approximately 5 kg more than 2007 BMW M.
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, 2007 BMW M (355 Nm @ 4900 RPM) has 25 more torque (in Nm) than 2003 BMW 320. (330 Nm @ 2000 RPM). This means 2007 BMW M will have an easier job in driving up hills or pulling heavy equipment than 2003 BMW 320.
Compare all specifications:
| 2003 BMW 320 | 2007 BMW M | |
| Make | BMW | BMW |
| Model | 320 | M |
| Year Released | 2003 | 2007 |
| Body Type | Coupe | Convertible |
| Engine Position | Front | Front |
| Engine Size | 1995 cc | 3245 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 141 HP | 330 HP |
| Engine RPM | 4000 RPM | 7900 RPM |
| Torque | 330 Nm | 355 Nm |
| Torque RPM | 2000 RPM | 4900 RPM |
| Engine Bore Size | 84 mm | 87 mm |
| Engine Stroke Size | 90 mm | 91 mm |
| Engine Compression Ratio | 17.0:1 | 11.5:1 |
| Fuel Type | Diesel | Gasoline |
| Top Speed | 221 km/hour | 250 km/hour |
| Acceleration 0-100mph | 8.8 seconds | 5 seconds |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 2 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1490 kg | 1485 kg |
| Vehicle Length | 4490 mm | 4120 mm |
| Vehicle Width | 1760 mm | 1790 mm |
| Vehicle Height | 1380 mm | 1310 mm |
| Wheelbase Size | 2730 mm | 2500 mm |
| Fuel Consumption | 4.5 L/100km | 9.8 L/100km |
| Fuel Consumption City | 7.9 L/100km | 14.7 L/100km |
| Fuel Consumption Overall | 5.7 L/100km | 12.4 L/100km |
| Fuel Tank Capacity | 63 L | 55 L |
