2003 BMW 325 vs. 2013 BMW 6 series
To start off, 2013 BMW 6 series is newer by 10 year(s). Which means there will be less support and parts availability for 2003 BMW 325. In addition, the cost of maintenance, including insurance, on 2003 BMW 325 would be higher. At 2,979 cc (6 cylinders), 2013 BMW 6 series is equipped with a bigger engine. In terms of performance, 2013 BMW 6 series (311 HP @ 6000 RPM) has 119 more horse power than 2003 BMW 325. (192 HP @ 6000 RPM) In normal driving conditions, 2013 BMW 6 series should accelerate faster than 2003 BMW 325. With that said, vehicle weight also plays an important factor in acceleration. 2013 BMW 6 series weights approximately 600 kg more than 2003 BMW 325. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Let's talk about torque, 2013 BMW 6 series (447 Nm @ 4500 RPM) has 202 more torque (in Nm) than 2003 BMW 325. (245 Nm @ 3500 RPM). This means 2013 BMW 6 series will have an easier job in driving up hills or pulling heavy equipment than 2003 BMW 325. 2013 BMW 6 series has automatic transmission and 2003 BMW 325 has manual transmission. 2003 BMW 325 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2013 BMW 6 series will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2003 BMW 325 | 2013 BMW 6 series | |
| Make | BMW | BMW |
| Model | 325 | 6 series |
| Year Released | 2003 | 2013 |
| Body Type | Hatchback | Convertible |
| Engine Position | Front | Front |
| Engine Size | 2494 cc | 2979 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 192 HP | 311 HP |
| Engine RPM | 6000 RPM | 6000 RPM |
| Torque | 245 Nm | 447 Nm |
| Torque RPM | 3500 RPM | 4500 RPM |
| Engine Bore Size | 84.1 mm | 84 mm |
| Engine Stroke Size | 75 mm | 89 mm |
| Engine Compression Ratio | 10.5:1 | 10.2 :1 |
| Acceleration 0-100mph | 7.1 seconds | 5.5 seconds |
| Transmission Type | Manual | 8-speed automatic |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 3 doors | 2 doors |
| Vehicle Weight | 1480 kg | 2080 kg |
| Vehicle Length | 4270 mm | 4897 mm |
| Vehicle Width | 1760 mm | 1895 mm |
| Vehicle Height | 1410 mm | 1364 mm |
| Wheelbase Size | 2730 mm | 2855 mm |
| Fuel Consumption | 7 L/100km | 7.6 L/100km |
| Fuel Consumption City | 12.3 L/100km | 11.2 L/100km |
| Fuel Tank Capacity | 63 L | 70 L |
