2000 Audi S8 vs. 2003 BMW 645
To start off, 2003 BMW 645 is newer by 3 year(s). Which means there will be less support and parts availability for 2000 Audi S8. In addition, the cost of maintenance, including insurance, on 2000 Audi S8 would be higher. At 4,398 cc (8 cylinders), 2003 BMW 645 is equipped with a bigger engine. In terms of performance, 2003 BMW 645 (325 HP @ 6100 RPM) has 78 more horse power than 2000 Audi S8. (247 HP @ 4000 RPM) In normal driving conditions, 2003 BMW 645 should accelerate faster than 2000 Audi S8. With that said, vehicle weight also plays an important factor in acceleration. 2000 Audi S8 weights approximately 60 kg more than 2003 BMW 645.
Because 2000 Audi S8 is all wheel drive (AWD), it will have significant more traction and grip than 2003 BMW 645. In wet, icy, snow, or gravel driving conditions, 2000 Audi S8 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, 2000 Audi S8 (583 Nm) has 133 more torque (in Nm) than 2003 BMW 645. (450 Nm). This means 2000 Audi S8 will have an easier job in driving up hills or pulling heavy equipment than 2003 BMW 645.
Compare all specifications:
| 2000 Audi S8 | 2003 BMW 645 | |
| Make | Audi | BMW |
| Model | S8 | 645 |
| Year Released | 2000 | 2003 |
| Body Type | Sedan | Coupe |
| Engine Position | Front | Front |
| Engine Size | 4172 cc | 4398 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 5 valves | 4 valves |
| Horse Power | 247 HP | 325 HP |
| Engine RPM | 4000 RPM | 6100 RPM |
| Torque | 583 Nm | 450 Nm |
| Engine Bore Size | 84.6 mm | 92 mm |
| Engine Stroke Size | 93 mm | 82.7 mm |
| Engine Compression Ratio | 11.0:1 | 10.5:1 |
| Top Speed | 249 km/hour | 250 km/hour |
| Drive Type | AWD | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1750 kg | 1690 kg |
| Vehicle Length | 5040 mm | 4830 mm |
| Vehicle Width | 1890 mm | 1860 mm |
| Vehicle Height | 1420 mm | 1380 mm |
| Wheelbase Size | 2760 mm | 2890 mm |
