1998 Audi A6 vs. 2004 BMW 645
To start off, 2004 BMW 645 is newer by 6 year(s). Which means there will be less support and parts availability for 1998 Audi A6. In addition, the cost of maintenance, including insurance, on 1998 Audi A6 would be higher. At 4,398 cc (8 cylinders), 2004 BMW 645 is equipped with a bigger engine. In terms of performance, 2004 BMW 645 (328 HP @ 6100 RPM) has 190 more horse power than 1998 Audi A6. (138 HP @ 4000 RPM) In normal driving conditions, 2004 BMW 645 should accelerate faster than 1998 Audi A6.
Because 2004 BMW 645 is rear wheel drive (RWD), it offers better handling in dry conditions; in addition, if you are looking to drift, it will be much easier to do with 2004 BMW 645. However, in wet, icy, snow, or gravel driving conditions, 1998 Audi A6, being front wheel drive (FWD), will offer much better control with better grip. 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 (450 Nm @ 3600 RPM) has 185 more torque (in Nm) than 1998 Audi A6. (265 Nm @ 1900 RPM). This means 2004 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 1998 Audi A6.
Compare all specifications:
| 1998 Audi A6 | 2004 BMW 645 | |
| Make | Audi | BMW |
| Model | A6 | 645 |
| Year Released | 1998 | 2004 |
| Body Type | Station Wagon | Coupe |
| Engine Position | Front | Front |
| Engine Size | 2459 cc | 4398 cc |
| Engine Cylinders | 5 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Horse Power | 138 HP | 328 HP |
| Engine RPM | 4000 RPM | 6100 RPM |
| Torque | 265 Nm | 450 Nm |
| Torque RPM | 1900 RPM | 3600 RPM |
| Fuel Type | Diesel | Gasoline - Premium |
| Drive Type | Front | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 5 doors | 2 doors |
| Vehicle Length | 4800 mm | 4830 mm |
| Vehicle Width | 1820 mm | 1860 mm |
| Vehicle Height | 1460 mm | 1380 mm |
| Wheelbase Size | 2760 mm | 2830 mm |
