2006 Alfa Romeo 156 vs. 2005 Fiat Siena
To start off, 2006 Alfa Romeo 156 is newer by 1 year(s). Which means there will be less support and parts availability for 2005 Fiat Siena. In addition, the cost of maintenance, including insurance, on 2005 Fiat Siena would be higher. At 2,387 cc (5 cylinders), 2006 Alfa Romeo 156 is equipped with a bigger engine. In terms of performance, 2006 Alfa Romeo 156 (173 HP @ 4000 RPM) has 103 more horse power than 2005 Fiat Siena. (70 HP @ 5750 RPM). In normal driving conditions, 2006 Alfa Romeo 156 should accelerate faster than 2005 Fiat Siena. With that said, vehicle weight also plays an important factor in acceleration. 2006 Alfa Romeo 156 weights approximately 490 kg more than 2005 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, 2006 Alfa Romeo 156 (385 Nm @ 2000 RPM) has 290 more torque (in Nm) than 2005 Fiat Siena. (95 Nm @ 4000 RPM). This means 2006 Alfa Romeo 156 will have an easier job in driving up hills or pulling heavy equipment than 2005 Fiat Siena.
Compare all specifications:
| 2006 Alfa Romeo 156 | 2005 Fiat Siena | |
| Make | Alfa Romeo | Fiat |
| Model | 156 | Siena |
| Year Released | 2006 | 2005 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 2387 cc | 999 cc |
| Engine Cylinders | 5 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 173 HP | 70 HP |
| Engine RPM | 4000 RPM | 5750 RPM |
| Torque | 385 Nm | 95 Nm |
| Torque RPM | 2000 RPM | 4000 RPM |
| Fuel Type | Diesel | Gasoline |
| Drive Type | Front | Front |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1510 kg | 1020 kg |
| Vehicle Length | 4440 mm | 4110 mm |
| Vehicle Width | 1750 mm | 1630 mm |
| Vehicle Height | 1440 mm | 1470 mm |
| Wheelbase Size | 2550 mm | 2380 mm |
