2008 Audi A8 vs. 2007 Fiat Siena
To start off, 2008 Audi A8 is newer by 1 year(s). Which means there will be less support and parts availability for 2007 Fiat Siena. In addition, the cost of maintenance, including insurance, on 2007 Fiat Siena would be higher. At 4,134 cc (8 cylinders), 2008 Audi A8 is equipped with a bigger engine. In terms of performance, 2008 Audi A8 (322 HP @ 3750 RPM) has 254 more horse power than 2007 Fiat Siena. (68 HP @ 4600 RPM). In normal driving conditions, 2008 Audi A8 should accelerate faster than 2007 Fiat Siena. With that said, vehicle weight also plays an important factor in acceleration. 2008 Audi A8 weights approximately 855 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.
Because 2008 Audi A8 is four wheel drive (4WD), it will have significant more traction and grip than 2007 Fiat Siena. In wet, icy, snow, or gravel driving conditions, 2008 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, 2008 Audi A8 (650 Nm @ 1600 RPM) has 515 more torque (in Nm) than 2007 Fiat Siena. (135 Nm @ 2500 RPM). This means 2008 Audi A8 will have an easier job in driving up hills or pulling heavy equipment than 2007 Fiat Siena. 2008 Audi A8 has automatic transmission and 2007 Fiat Siena has manual transmission. 2007 Fiat Siena will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2008 Audi A8 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2008 Audi A8 | 2007 Fiat Siena | |
| Make | Audi | Fiat |
| Model | A8 | Siena |
| Year Released | 2008 | 2007 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 4134 cc | 1697 cc |
| Engine Cylinders | 8 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 4 valves | 2 valves |
| Horse Power | 322 HP | 68 HP |
| Engine RPM | 3750 RPM | 4600 RPM |
| Torque | 650 Nm | 135 Nm |
| Torque RPM | 1600 RPM | 2500 RPM |
| Engine Compression Ratio | 16.5:1 | 20.3:1 |
| Fuel Type | Diesel | Diesel |
| Top Speed | 245 km/hour | 160 km/hour |
| Acceleration 0-100mph | 5.9 seconds | 16.3 seconds |
| Drive Type | 4WD | Front |
| Transmission Type | Automatic | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1945 kg | 1090 kg |
| Vehicle Length | 5070 mm | 4140 mm |
| Vehicle Width | 1900 mm | 1640 mm |
| Vehicle Height | 1450 mm | 1440 mm |
| Wheelbase Size | 2950 mm | 2380 mm |
| Fuel Consumption Overall | 9.4 L/100km | 6.9 L/100km |
| Fuel Tank Capacity | 90 L | 47 L |
