2004 Audi A8 vs. 2005 Fiat Siena
To start off, 2005 Fiat Siena is newer by 1 year(s). Which means there will be less support and parts availability for 2004 Audi A8. In addition, the cost of maintenance, including insurance, on 2004 Audi A8 would be higher. At 3,935 cc (8 cylinders), 2004 Audi A8 is equipped with a bigger engine. In terms of performance, 2004 Audi A8 (271 HP @ 3750 RPM) has 147 more horse power than 2005 Fiat Siena. (124 HP @ 4000 RPM). In normal driving conditions, 2004 Audi A8 should accelerate faster than 2005 Fiat Siena. With that said, vehicle weight also plays an important factor in acceleration. 2004 Audi A8 weights approximately 845 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.
Because 2004 Audi A8 is four wheel drive (4WD), it will have significant more traction and grip than 2005 Fiat Siena. In wet, icy, snow, or gravel driving conditions, 2004 Audi A8 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, 2004 Audi A8 (650 Nm @ 1800 RPM) has 510 more torque (in Nm) than 2005 Fiat Siena. (140 Nm @ 4000 RPM). This means 2004 Audi A8 will have an easier job in driving up hills or pulling heavy equipment than 2005 Fiat Siena. 2004 Audi A8 has automatic transmission and 2005 Fiat Siena has manual transmission. 2005 Fiat Siena will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2004 Audi A8 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2004 Audi A8 | 2005 Fiat Siena | |
| Make | Audi | Fiat |
| Model | A8 | Siena |
| Year Released | 2004 | 2005 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 3935 cc | 1585 cc |
| Engine Cylinders | 8 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 271 HP | 124 HP |
| Engine RPM | 3750 RPM | 4000 RPM |
| Torque | 650 Nm | 140 Nm |
| Torque RPM | 1800 RPM | 4000 RPM |
| Engine Bore Size | 81 mm | 86.4 mm |
| Engine Stroke Size | 95.5 mm | 67.4 mm |
| Drive Type | 4WD | Front |
| Transmission Type | Automatic | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1940 kg | 1095 kg |
| Wheelbase Size | 2950 mm | 2450 mm |
| Fuel Tank Capacity | 90 L | 47 L |
