2009 Audi A8 vs. 2007 BMW 545
To start off, 2009 Audi A8 is newer by 2 year(s). Which means there will be less support and parts availability for 2007 BMW 545. In addition, the cost of maintenance, including insurance, on 2007 BMW 545 would be higher. At 5,204 cc (10 cylinders), 2009 Audi A8 is equipped with a bigger engine. In terms of performance, 2009 Audi A8 (444 HP @ 7000 RPM) has 116 more horse power than 2007 BMW 545. (328 HP @ 6100 RPM). In normal driving conditions, 2009 Audi A8 should accelerate faster than 2007 BMW 545. With that said, vehicle weight also plays an important factor in acceleration. 2009 Audi A8 weights approximately 235 kg more than 2007 BMW 545. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2009 Audi A8 is four wheel drive (4WD), it will have significant more traction and grip than 2007 BMW 545. In wet, icy, snow, or gravel driving conditions, 2009 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, 2009 Audi A8 (540 Nm @ 3500 RPM) has 90 more torque (in Nm) than 2007 BMW 545. (450 Nm @ 3600 RPM). This means 2009 Audi A8 will have an easier job in driving up hills or pulling heavy equipment than 2007 BMW 545.
Compare all specifications:
| 2009 Audi A8 | 2007 BMW 545 | |
| Make | Audi | BMW |
| Model | A8 | 545 |
| Year Released | 2009 | 2007 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 5204 cc | 4398 cc |
| Engine Cylinders | 10 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 444 HP | 328 HP |
| Engine RPM | 7000 RPM | 6100 RPM |
| Torque | 540 Nm | 450 Nm |
| Torque RPM | 3500 RPM | 3600 RPM |
| Engine Compression Ratio | 12.5:1 | 10.0:1 |
| Fuel Type | Gasoline - Premium | Gasoline - Premium |
| Top Speed | 250 km/hour | 245 km/hour |
| Acceleration 0-100mph | 5.1 seconds | 5.8 seconds |
| Drive Type | 4WD | Rear |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1940 kg | 1705 kg |
| Vehicle Length | 5070 mm | 4850 mm |
| Vehicle Width | 1900 mm | 1850 mm |
| Vehicle Height | 1430 mm | 1470 mm |
| Wheelbase Size | 2950 mm | 2890 mm |
| Fuel Consumption Overall | 15.8 L/100km | 11 L/100km |
| Fuel Tank Capacity | 90 L | 70 L |
