2005 Alfa Romeo 156 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 156. In addition, the cost of maintenance, including insurance, on 2005 Alfa Romeo 156 would be higher. At 1,598 cc (4 cylinders), 2005 Alfa Romeo 156 is equipped with a bigger engine. In terms of performance, 2005 Alfa Romeo 156 (118 HP @ 6200 RPM) has 46 more horse power than 2007 Fiat Siena. (72 HP @ 6000 RPM). In normal driving conditions, 2005 Alfa Romeo 156 should accelerate faster than 2007 Fiat Siena. With that said, vehicle weight also plays an important factor in acceleration. 2005 Alfa Romeo 156 weights approximately 346 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 156 (146 Nm @ 4500 RPM) has 44 more torque (in Nm) than 2007 Fiat Siena. (102 Nm @ 3250 RPM). This means 2005 Alfa Romeo 156 will have an easier job in driving up hills or pulling heavy equipment than 2007 Fiat Siena.
Compare all specifications:
| 2005 Alfa Romeo 156 | 2007 Fiat Siena | |
| Make | Alfa Romeo | Fiat |
| Model | 156 | Siena |
| Year Released | 2005 | 2007 |
| Body Type | Station Wagon | Sedan |
| Engine Position | Front | Front |
| Engine Size | 1598 cc | 1242 cc |
| Engine Cylinders | 4 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 2 valves |
| Horse Power | 118 HP | 72 HP |
| Engine RPM | 6200 RPM | 6000 RPM |
| Torque | 146 Nm | 102 Nm |
| Torque RPM | 4500 RPM | 3250 RPM |
| Engine Bore Size | 82 mm | 70.9 mm |
| Engine Stroke Size | 75.7 mm | 78.9 mm |
| Engine Compression Ratio | 10.3:1 | 9.1:1 |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Front | Front |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 4 doors |
| Vehicle Weight | 1416 kg | 1070 kg |
| Vehicle Length | 4450 mm | 3830 mm |
| Vehicle Width | 1750 mm | 1640 mm |
| Vehicle Height | 1440 mm | 1440 mm |
| Wheelbase Size | 2550 mm | 2380 mm |
| Fuel Consumption Overall | 7.5 L/100km | 7.8 L/100km |
| Fuel Tank Capacity | 63 L | 54 L |
