2006 Audi A8 vs. 2003 BMW 645
To start off, 2006 Audi A8 is newer by 3 year(s). Which means there will be less support and parts availability for 2003 BMW 645. In addition, the cost of maintenance, including insurance, on 2003 BMW 645 would be higher. At 4,398 cc (8 cylinders), 2003 BMW 645 is equipped with a bigger engine. In terms of performance, 2006 Audi A8 (322 HP @ 3750 RPM) has 12 more horse power than 2003 BMW 645. (310 HP @ 6000 RPM). In normal driving conditions, 2006 Audi A8 should accelerate faster than 2003 BMW 645. With that said, vehicle weight also plays an important factor in acceleration. 2006 Audi A8 weights approximately 247 kg more than 2003 BMW 645. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2006 Audi A8 is four wheel drive (4WD), it will have significant more traction and grip than 2003 BMW 645. In wet, icy, snow, or gravel driving conditions, 2006 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, 2006 Audi A8 (650 Nm @ 1600 RPM) has 200 more torque (in Nm) than 2003 BMW 645. (450 Nm @ 3600 RPM). This means 2006 Audi A8 will have an easier job in driving up hills or pulling heavy equipment than 2003 BMW 645.
Compare all specifications:
2006 Audi A8 | 2003 BMW 645 | |
Make | Audi | BMW |
Model | A8 | 645 |
Year Released | 2006 | 2003 |
Body Type | Sedan | Coupe |
Engine Position | Front | Front |
Engine Size | 4134 cc | 4398 cc |
Engine Cylinders | 8 cylinders | 8 cylinders |
Engine Type | V | V |
Valves per Cylinder | 4 valves | 4 valves |
Horse Power | 322 HP | 310 HP |
Engine RPM | 3750 RPM | 6000 RPM |
Torque | 650 Nm | 450 Nm |
Torque RPM | 1600 RPM | 3600 RPM |
Engine Bore Size | 83 mm | 92 mm |
Engine Stroke Size | 95.5 mm | 82.7 mm |
Engine Compression Ratio | 16.5:1 | 10.5:1 |
Top Speed | 250 km/hour | 250 km/hour |
Acceleration 0-100mph | 5.9 seconds | 5.9 seconds |
Drive Type | 4WD | Rear |
Transmission Type | Automatic | Automatic |
Number of Seats | 5 seats | 4 seats |
Number of Doors | 4 doors | 2 doors |
Vehicle Weight | 1945 kg | 1698 kg |
Vehicle Length | 5070 mm | 4830 mm |
Vehicle Width | 1900 mm | 1860 mm |
Vehicle Height | 1450 mm | 1380 mm |
Wheelbase Size | 2950 mm | 2790 mm |
Fuel Consumption Overall | 9.6 L/100km | 10.9 L/100km |
Fuel Tank Capacity | 90 L | 70 L |