2008 Audi A4 vs. 2006 Fiat Siena
To start off, 2008 Audi A4 is newer by 2 year(s). Which means there will be less support and parts availability for 2006 Fiat Siena. In addition, the cost of maintenance, including insurance, on 2006 Fiat Siena would be higher. At 1,781 cc (4 cylinders), 2008 Audi A4 is equipped with a bigger engine. In terms of performance, 2008 Audi A4 (161 HP @ 5700 RPM) has 89 more horse power than 2006 Fiat Siena. (72 HP @ 6000 RPM). In normal driving conditions, 2008 Audi A4 should accelerate faster than 2006 Fiat Siena. With that said, vehicle weight also plays an important factor in acceleration. 2008 Audi A4 weights approximately 460 kg more than 2006 Fiat Siena. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2008 Audi A4 is four wheel drive (4WD), it will have significant more traction and grip than 2006 Fiat Siena. In wet, icy, snow, or gravel driving conditions, 2008 Audi A4 will offer significantly more control. 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, 2008 Audi A4 (225 Nm @ 1950 RPM) has 123 more torque (in Nm) than 2006 Fiat Siena. (102 Nm @ 3250 RPM). This means 2008 Audi A4 will have an easier job in driving up hills or pulling heavy equipment than 2006 Fiat Siena.
Compare all specifications:
| 2008 Audi A4 | 2006 Fiat Siena | |
| Make | Audi | Fiat |
| Model | A4 | Siena |
| Year Released | 2008 | 2006 |
| Body Type | Convertible | Sedan |
| Engine Position | Front | Front |
| Engine Size | 1781 cc | 1242 cc |
| Engine Cylinders | 4 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 5 valves | 2 valves |
| Horse Power | 161 HP | 72 HP |
| Engine RPM | 5700 RPM | 6000 RPM |
| Torque | 225 Nm | 102 Nm |
| Torque RPM | 1950 RPM | 3250 RPM |
| Engine Bore Size | 81.1 mm | 70.8 mm |
| Engine Stroke Size | 86.4 mm | 78.8 mm |
| Engine Compression Ratio | 9.0:1 | 9.1:1 |
| Acceleration 0-100mph | 9.5 seconds | 13.5 seconds |
| Drive Type | 4WD | Front |
| Transmission Type | Manual | Manual |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1630 kg | 1170 kg |
| Vehicle Length | 4580 mm | 3830 mm |
| Vehicle Width | 1780 mm | 1640 mm |
| Vehicle Height | 1400 mm | 1440 mm |
| Wheelbase Size | 2660 mm | 2380 mm |
| Fuel Consumption Overall | 9.4 L/100km | 7.8 L/100km |
| Fuel Tank Capacity | 66 L | 54 L |
