1994 Audi A8 vs. 2004 BMW 645
To start off, 2004 BMW 645 is newer by 10 year(s). Which means there will be less support and parts availability for 1994 Audi A8. In addition, the cost of maintenance, including insurance, on 1994 Audi A8 would be higher. At 4,392 cc (8 cylinders), 2004 BMW 645 is equipped with a bigger engine. In terms of performance, 2004 BMW 645 (322 HP @ 7400 RPM) has 26 more horse power than 1994 Audi A8. (296 HP @ 6000 RPM) In normal driving conditions, 2004 BMW 645 should accelerate faster than 1994 Audi A8. With that said, vehicle weight also plays an important factor in acceleration. 1994 Audi A8 weights approximately 35 kg more than 2004 BMW 645.
Because 1994 Audi A8 is four wheel drive (4WD), it will have significant more traction and grip than 2004 BMW 645. In wet, icy, snow, or gravel driving conditions, 1994 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, 2004 BMW 645 (447 Nm) has 47 more torque (in Nm) than 1994 Audi A8. (400 Nm). This means 2004 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 1994 Audi A8.
Compare all specifications:
| 1994 Audi A8 | 2004 BMW 645 | |
| Make | Audi | BMW |
| Model | A8 | 645 |
| Year Released | 1994 | 2004 |
| Body Type | Sedan | Coupe |
| Engine Position | Front | Front |
| Engine Size | 4172 cc | 4392 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 296 HP | 322 HP |
| Engine RPM | 6000 RPM | 7400 RPM |
| Torque | 400 Nm | 447 Nm |
| Engine Bore Size | 84.6 mm | 92 mm |
| Engine Stroke Size | 93 mm | 83 mm |
| Drive Type | 4WD | Rear |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1750 kg | 1715 kg |
| Vehicle Length | 5040 mm | 4840 mm |
| Vehicle Width | 1890 mm | 1860 mm |
| Vehicle Height | 1440 mm | 1380 mm |
| Wheelbase Size | 2890 mm | 2790 mm |
| Fuel Tank Capacity | 55 L | 70 L |
