2008 Audi A8 vs. 2005 BMW 730
To start off, 2008 Audi A8 is newer by 3 year(s). Which means there will be less support and parts availability for 2005 BMW 730. In addition, the cost of maintenance, including insurance, on 2005 BMW 730 would be higher. At 4,172 cc (8 cylinders), 2008 Audi A8 is equipped with a bigger engine. In terms of performance, 2008 Audi A8 (330 HP @ 6500 RPM) has 105 more horse power than 2005 BMW 730. (225 HP @ 6250 RPM). In normal driving conditions, 2008 Audi A8 should accelerate faster than 2005 BMW 730. With that said, vehicle weight also plays an important factor in acceleration. 2008 Audi A8 weights approximately 120 kg more than 2005 BMW 730. 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 2005 BMW 730. 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 (431 Nm @ 3500 RPM) has 131 more torque (in Nm) than 2005 BMW 730. (300 Nm @ 3500 RPM). This means 2008 Audi A8 will have an easier job in driving up hills or pulling heavy equipment than 2005 BMW 730.
Compare all specifications:
| 2008 Audi A8 | 2005 BMW 730 | |
| Make | Audi | BMW |
| Model | A8 | 730 |
| Year Released | 2008 | 2005 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 4172 cc | 2982 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 5 valves | 4 valves |
| Horse Power | 330 HP | 225 HP |
| Engine RPM | 6500 RPM | 6250 RPM |
| Torque | 431 Nm | 300 Nm |
| Torque RPM | 3500 RPM | 3500 RPM |
| Engine Bore Size | 84.5 mm | 84 mm |
| Engine Stroke Size | 93 mm | 90 mm |
| Fuel Type | Gasoline - Premium | Gasoline |
| Drive Type | 4WD | Rear |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1910 kg | 1790 kg |
| Vehicle Length | 5190 mm | 5040 mm |
| Vehicle Width | 1900 mm | 1910 mm |
| Vehicle Height | 1460 mm | 1500 mm |
| Wheelbase Size | 3080 mm | 3000 mm |
| Fuel Tank Capacity | 90 L | 63 L |
