2003 Daihatsu Copen vs. 2005 Opel Signum
To start off, 2005 Opel Signum is newer by 2 year(s). Which means there will be less support and parts availability for 2003 Daihatsu Copen. In addition, the cost of maintenance, including insurance, on 2003 Daihatsu Copen would be higher. At 2,958 cc (6 cylinders), 2005 Opel Signum is equipped with a bigger engine. In terms of performance, 2005 Opel Signum (175 HP @ 4000 RPM) has 108 more horse power than 2003 Daihatsu Copen. (67 HP @ 6000 RPM) In normal driving conditions, 2005 Opel Signum should accelerate faster than 2003 Daihatsu Copen. With that said, vehicle weight also plays an important factor in acceleration. 2005 Opel Signum weights approximately 820 kg more than 2003 Daihatsu Copen. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Both vehicles are front wheel drive (FWD). Which offers better traction when its slippery than rear 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, 2005 Opel Signum (370 Nm @ 1900 RPM) has 268 more torque (in Nm) than 2003 Daihatsu Copen. (102 Nm @ 3200 RPM). This means 2005 Opel Signum will have an easier job in driving up hills or pulling heavy equipment than 2003 Daihatsu Copen. 2005 Opel Signum has automatic transmission and 2003 Daihatsu Copen has manual transmission. 2003 Daihatsu Copen will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2005 Opel Signum will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2003 Daihatsu Copen | 2005 Opel Signum | |
| Make | Daihatsu | Opel |
| Model | Copen | Signum |
| Year Released | 2003 | 2005 |
| Body Type | Roadster | Hatchback |
| Engine Position | Front | Front |
| Engine Size | 657 cc | 2958 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 67 HP | 175 HP |
| Engine RPM | 6000 RPM | 4000 RPM |
| Torque | 102 Nm | 370 Nm |
| Torque RPM | 3200 RPM | 1900 RPM |
| Engine Bore Size | 61 mm | 87.5 mm |
| Engine Stroke Size | 56.4 mm | 82 mm |
| Engine Compression Ratio | 8.0:1 | 18.5:1 |
| Fuel Type | Gasoline | Diesel |
| Drive Type | Front | Front |
| Transmission Type | Manual | Automatic |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Weight | 850 kg | 1670 kg |
| Vehicle Length | 3400 mm | 4640 mm |
| Vehicle Width | 1480 mm | 1800 mm |
| Vehicle Height | 1250 mm | 1470 mm |
| Wheelbase Size | 2240 mm | 2620 mm |
| Fuel Tank Capacity | 43 L | 60 L |
