2007 BMW Convertible vs. 2005 Opel Signum
To start off, 2007 BMW Convertible is newer by 2 year(s). Which means there will be less support and parts availability for 2005 Opel Signum. In addition, the cost of maintenance, including insurance, on 2005 Opel Signum would be higher. At 4,799 cc (8 cylinders), 2007 BMW Convertible is equipped with a bigger engine. In terms of performance, 2007 BMW Convertible (362 HP @ 6300 RPM) has 187 more horse power than 2005 Opel Signum. (175 HP @ 4000 RPM). In normal driving conditions, 2007 BMW Convertible should accelerate faster than 2005 Opel Signum. With that said, vehicle weight also plays an important factor in acceleration. 2007 BMW Convertible weights approximately 180 kg more than 2005 Opel Signum. 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 Convertible (490 Nm @ 3400 RPM) has 120 more torque (in Nm) than 2005 Opel Signum. (370 Nm @ 1900 RPM). This means 2007 BMW Convertible will have an easier job in driving up hills or pulling heavy equipment than 2005 Opel Signum.
Compare all specifications:
| 2007 BMW Convertible | 2005 Opel Signum | |
| Make | BMW | Opel |
| Model | Convertible | Signum |
| Year Released | 2007 | 2005 |
| Body Type | Convertible | Hatchback |
| Engine Position | Front | Front |
| Engine Size | 4799 cc | 2958 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 362 HP | 175 HP |
| Engine RPM | 6300 RPM | 4000 RPM |
| Torque | 490 Nm | 370 Nm |
| Torque RPM | 3400 RPM | 1900 RPM |
| Engine Compression Ratio | 10.5:1 | 18.5:1 |
| Fuel Type | Gasoline | Diesel |
| Acceleration 0-100mph | 5.7 seconds | 9.4 seconds |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Weight | 1850 kg | 1670 kg |
| Vehicle Length | 4830 mm | 4640 mm |
| Vehicle Width | 1380 mm | 1800 mm |
| Vehicle Height | 1860 mm | 1470 mm |
| Wheelbase Size | 2790 mm | 2620 mm |
| Fuel Tank Capacity | 70 L | 60 L |
