2009 Audi A8 vs. 2003 BMW X5
To start off, 2009 Audi A8 is newer by 6 year(s). Which means there will be less support and parts availability for 2003 BMW X5. In addition, the cost of maintenance, including insurance, on 2003 BMW X5 would be higher. At 4,398 cc (8 cylinders), 2003 BMW X5 is equipped with a bigger engine. In terms of performance, 2009 Audi A8 (350 HP @ 6800 RPM) has 12 more horse power than 2003 BMW X5. (338 HP @ 6100 RPM). In normal driving conditions, 2009 Audi A8 should accelerate faster than 2003 BMW X5. With that said, vehicle weight also plays an important factor in acceleration. 2003 BMW X5 weights approximately 1031 kg more than 2009 Audi A8.
Both vehicles are four wheel drive (4WD) - it offers better handling, traction, and control in all driving conditions compared with front wheel drive or rear wheel drive vehicles. 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 (441 Nm @ 3500 RPM) has 41 more torque (in Nm) than 2003 BMW X5. (400 Nm @ 3700 RPM). This means 2009 Audi A8 will have an easier job in driving up hills or pulling heavy equipment than 2003 BMW X5.
Compare all specifications:
| 2009 Audi A8 | 2003 BMW X5 | |
| Make | Audi | BMW |
| Model | A8 | X5 |
| Year Released | 2009 | 2003 |
| Body Type | Sedan | SUV |
| Engine Position | Front | Front |
| Engine Size | 4163 cc | 4398 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 350 HP | 338 HP |
| Engine RPM | 6800 RPM | 6100 RPM |
| Torque | 441 Nm | 400 Nm |
| Torque RPM | 3500 RPM | 3700 RPM |
| Engine Bore Size | 84.5 mm | 92 mm |
| Engine Stroke Size | 92.8 mm | 82.7 mm |
| Engine Compression Ratio | 12.5:1 | 10.0:1 |
| Drive Type | 4WD | 4WD |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Weight | 1164 kg | 2195 kg |
| Vehicle Length | 5200 mm | 4670 mm |
| Vehicle Width | 1900 mm | 1880 mm |
| Vehicle Height | 1460 mm | 1720 mm |
| Wheelbase Size | 3080 mm | 2730 mm |
| Fuel Consumption | 10.2 L/100km | 10.4 L/100km |
| Fuel Consumption City | 14.7 L/100km | 18.3 L/100km |
| Fuel Consumption Overall | 13.1 L/100km | 13.3 L/100km |
| Fuel Tank Capacity | 90 L | 93 L |
