2003 Alfa Romeo 166 vs. 2007 Daihatsu Sirion
To start off, 2007 Daihatsu Sirion is newer by 4 year(s). Which means there will be less support and parts availability for 2003 Alfa Romeo 166. In addition, the cost of maintenance, including insurance, on 2003 Alfa Romeo 166 would be higher. At 2,492 cc (6 cylinders), 2003 Alfa Romeo 166 is equipped with a bigger engine. In terms of performance, 2003 Alfa Romeo 166 (185 HP @ 6300 RPM) has 99 more horse power than 2007 Daihatsu Sirion. (86 HP @ 6000 RPM). In normal driving conditions, 2003 Alfa Romeo 166 should accelerate faster than 2007 Daihatsu Sirion. With that said, vehicle weight also plays an important factor in acceleration. 2003 Alfa Romeo 166 weights approximately 510 kg more than 2007 Daihatsu Sirion. 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, 2003 Alfa Romeo 166 (221 Nm @ 5000 RPM) has 101 more torque (in Nm) than 2007 Daihatsu Sirion. (120 Nm @ 3200 RPM). This means 2003 Alfa Romeo 166 will have an easier job in driving up hills or pulling heavy equipment than 2007 Daihatsu Sirion.
Compare all specifications:
| 2003 Alfa Romeo 166 | 2007 Daihatsu Sirion | |
| Make | Alfa Romeo | Daihatsu |
| Model | 166 | Sirion |
| Year Released | 2003 | 2007 |
| Body Type | Sedan | Hatchback |
| Engine Position | Front | Front |
| Engine Size | 2492 cc | 1298 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 185 HP | 86 HP |
| Engine RPM | 6300 RPM | 6000 RPM |
| Torque | 221 Nm | 120 Nm |
| Torque RPM | 5000 RPM | 3200 RPM |
| Engine Compression Ratio | 10.3:1 | 10.0:1 |
| Top Speed | 220 km/hour | 180 km/hour |
| Drive Type | Front | Front |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Weight | 1435 kg | 925 kg |
| Vehicle Length | 4730 mm | 3610 mm |
| Vehicle Width | 1810 mm | 1670 mm |
| Vehicle Height | 1420 mm | 1560 mm |
| Wheelbase Size | 2710 mm | 2440 mm |
| Fuel Consumption Overall | 11.9 L/100km | 5 L/100km |
| Fuel Tank Capacity | 69 L | 40 L |
