2003 Daihatsu Copen vs. 2006 Fiat Siena
To start off, 2006 Fiat Siena is newer by 3 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 1,242 cc (4 cylinders), 2006 Fiat Siena is equipped with a bigger engine. In terms of performance, 2006 Fiat Siena (72 HP @ 6000 RPM) has 5 more horse power than 2003 Daihatsu Copen. (67 HP @ 6000 RPM) In normal driving conditions, 2006 Fiat Siena should accelerate faster than 2003 Daihatsu Copen. With that said, vehicle weight also plays an important factor in acceleration. 2006 Fiat Siena weights approximately 320 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, both vehicles can yield 102 Nm of torque. So under normal driving conditions, the ability to climb up hills and pull heavy equipment should be relatively similar for both vehicles.
Compare all specifications:
| 2003 Daihatsu Copen | 2006 Fiat Siena | |
| Make | Daihatsu | Fiat |
| Model | Copen | Siena |
| Year Released | 2003 | 2006 |
| Body Type | Roadster | Sedan |
| Engine Position | Front | Front |
| Engine Size | 657 cc | 1242 cc |
| Engine Cylinders | 4 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 2 valves |
| Horse Power | 67 HP | 72 HP |
| Engine RPM | 6000 RPM | 6000 RPM |
| Torque | 102 Nm | 102 Nm |
| Torque RPM | 3200 RPM | 3250 RPM |
| Engine Bore Size | 61 mm | 70.8 mm |
| Engine Stroke Size | 56.4 mm | 78.8 mm |
| Engine Compression Ratio | 8.0:1 | 9.1:1 |
| Drive Type | Front | Front |
| Transmission Type | Manual | Manual |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 850 kg | 1170 kg |
| Vehicle Length | 3400 mm | 3830 mm |
| Vehicle Width | 1480 mm | 1640 mm |
| Vehicle Height | 1250 mm | 1440 mm |
| Wheelbase Size | 2240 mm | 2380 mm |
| Fuel Tank Capacity | 43 L | 54 L |
