2005 BMW 325 vs. 2007 BMW 645
To start off, 2007 BMW 645 is newer by 2 year(s). Which means there will be less support and parts availability for 2005 BMW 325. In addition, the cost of maintenance, including insurance, on 2005 BMW 325 would be higher. At 4,398 cc (8 cylinders), 2007 BMW 645 is equipped with a bigger engine. In terms of performance, 2007 BMW 645 (328 HP @ 6100 RPM) has 139 more horse power than 2005 BMW 325. (189 HP @ 7400 RPM) In normal driving conditions, 2007 BMW 645 should accelerate faster than 2005 BMW 325. With that said, vehicle weight also plays an important factor in acceleration. 2007 BMW 645 weights approximately 290 kg more than 2005 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, 2007 BMW 645 (450 Nm) has 212 more torque (in Nm) than 2005 BMW 325. (238 Nm). This means 2007 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 2005 BMW 325.
Compare all specifications:
| 2005 BMW 325 | 2007 BMW 645 | |
| Make | BMW | BMW |
| Model | 325 | 645 |
| Year Released | 2005 | 2007 |
| Body Type | Station Wagon | Convertible |
| Engine Position | Front | Front |
| Engine Size | 2491 cc | 4398 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 189 HP | 328 HP |
| Engine RPM | 7400 RPM | 6100 RPM |
| Torque | 238 Nm | 450 Nm |
| Engine Bore Size | 84 mm | 92 mm |
| Engine Stroke Size | 75 mm | 82.7 mm |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 5 doors | 2 doors |
| Vehicle Weight | 1525 kg | 1815 kg |
| Vehicle Length | 4480 mm | 4830 mm |
| Vehicle Width | 1750 mm | 1860 mm |
| Vehicle Height | 1420 mm | 1380 mm |
| Wheelbase Size | 2730 mm | 2790 mm |
| Fuel Consumption Overall | 9.8 L/100km | 13 L/100km |
| Fuel Tank Capacity | 63 L | 70 L |
