2005 Alfa Romeo 166 vs. 2007 Fiat Siena
To start off, 2007 Fiat Siena is newer by 2 year(s). Which means there will be less support and parts availability for 2005 Alfa Romeo 166. In addition, the cost of maintenance, including insurance, on 2005 Alfa Romeo 166 would be higher. At 1,970 cc (4 cylinders), 2005 Alfa Romeo 166 is equipped with a bigger engine. In terms of performance, 2005 Alfa Romeo 166 (148 HP @ 6500 RPM) has 76 more horse power than 2007 Fiat Siena. (72 HP @ 6000 RPM). In normal driving conditions, 2005 Alfa Romeo 166 should accelerate faster than 2007 Fiat Siena. With that said, vehicle weight also plays an important factor in acceleration. 2005 Alfa Romeo 166 weights approximately 425 kg more than 2007 Fiat Siena. 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 Alfa Romeo 166 (181 Nm @ 3800 RPM) has 79 more torque (in Nm) than 2007 Fiat Siena. (102 Nm @ 3250 RPM). This means 2005 Alfa Romeo 166 will have an easier job in driving up hills or pulling heavy equipment than 2007 Fiat Siena.
Compare all specifications:
| 2005 Alfa Romeo 166 | 2007 Fiat Siena | |
| Make | Alfa Romeo | Fiat |
| Model | 166 | Siena |
| Year Released | 2005 | 2007 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 1970 cc | 1242 cc |
| Engine Cylinders | 4 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 2 valves |
| Horse Power | 148 HP | 72 HP |
| Engine RPM | 6500 RPM | 6000 RPM |
| Torque | 181 Nm | 102 Nm |
| Torque RPM | 3800 RPM | 3250 RPM |
| Engine Compression Ratio | 10.0:1 | 9.1:1 |
| Fuel Type | Gasoline - Premium | Gasoline |
| Acceleration 0-100mph | 9.8 seconds | 13.5 seconds |
| Drive Type | Front | Front |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1495 kg | 1070 kg |
| Vehicle Length | 4730 mm | 3830 mm |
| Vehicle Width | 1810 mm | 1640 mm |
| Vehicle Height | 1420 mm | 1440 mm |
| Wheelbase Size | 2710 mm | 2380 mm |
| Fuel Consumption Overall | 9.7 L/100km | 7.8 L/100km |
| Fuel Tank Capacity | 70 L | 54 L |
