2006 BMW 325 vs. 2007 Opel Signum
To start off, 2007 Opel Signum is newer by 1 year(s). Which means there will be less support and parts availability for 2006 BMW 325. In addition, the cost of maintenance, including insurance, on 2006 BMW 325 would be higher. At 2,958 cc (6 cylinders), 2007 Opel Signum is equipped with a bigger engine. In terms of performance, 2006 BMW 325 (184 HP @ 6000 RPM) has 9 more horse power than 2007 Opel Signum. (175 HP @ 4000 RPM). In normal driving conditions, 2006 BMW 325 should accelerate faster than 2007 Opel Signum. With that said, vehicle weight also plays an important factor in acceleration. 2007 Opel Signum weights approximately 55 kg more than 2006 BMW 325.
Because 2006 BMW 325 is rear wheel drive (RWD), it offers better handling in dry conditions; in addition, if you are looking to drift, it will be much easier to do with 2006 BMW 325. However, in wet, icy, snow, or gravel driving conditions, 2007 Opel Signum, being front wheel drive (FWD), will offer much better control with better grip. 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 Opel Signum (370 Nm @ 1900 RPM) has 133 more torque (in Nm) than 2006 BMW 325. (237 Nm @ 3500 RPM). This means 2007 Opel Signum will have an easier job in driving up hills or pulling heavy equipment than 2006 BMW 325.
Compare all specifications:
| 2006 BMW 325 | 2007 Opel Signum | |
| Make | BMW | Opel |
| Model | 325 | Signum |
| Year Released | 2006 | 2007 |
| Body Type | Convertible | Hatchback |
| Engine Position | Front | Front |
| Engine Size | 2491 cc | 2958 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | V |
| Horse Power | 184 HP | 175 HP |
| Engine RPM | 6000 RPM | 4000 RPM |
| Torque | 237 Nm | 370 Nm |
| Torque RPM | 3500 RPM | 1900 RPM |
| Engine Bore Size | 84 mm | 87.5 mm |
| Engine Stroke Size | 75 mm | 82 mm |
| Engine Compression Ratio | 10.5:1 | 18.5:1 |
| Drive Type | Rear | Front |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Weight | 1615 kg | 1670 kg |
| Vehicle Length | 4490 mm | 4640 mm |
| Vehicle Width | 1760 mm | 1800 mm |
| Vehicle Height | 1380 mm | 1470 mm |
| Wheelbase Size | 2730 mm | 2840 mm |
| Fuel Consumption Overall | 10.7 L/100km | 7.4 L/100km |
| Fuel Tank Capacity | 63 L | 60 L |
