2000 Audi A4 vs. 2005 BMW 645
To start off, 2005 BMW 645 is newer by 5 year(s). Which means there will be less support and parts availability for 2000 Audi A4. In addition, the cost of maintenance, including insurance, on 2000 Audi A4 would be higher. At 4,392 cc (8 cylinders), 2005 BMW 645 is equipped with a bigger engine. In terms of performance, 2005 BMW 645 (326 HP @ 6100 RPM) has 79 more horse power than 2000 Audi A4. (247 HP @ 6300 RPM) In normal driving conditions, 2005 BMW 645 should accelerate faster than 2000 Audi A4. With that said, vehicle weight also plays an important factor in acceleration. 2005 BMW 645 weights approximately 380 kg more than 2000 Audi A4. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2000 Audi A4 is four wheel drive (4WD), it will have significant more traction and grip than 2005 BMW 645. In wet, icy, snow, or gravel driving conditions, 2000 Audi A4 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, 2005 BMW 645 (447 Nm @ 3600 RPM) has 212 more torque (in Nm) than 2000 Audi A4. (235 Nm @ 3200 RPM). This means 2005 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 2000 Audi A4.
Compare all specifications:
| 2000 Audi A4 | 2005 BMW 645 | |
| Make | Audi | BMW |
| Model | A4 | 645 |
| Year Released | 2000 | 2005 |
| Body Type | Sedan | Convertible |
| Engine Position | Front | Front |
| Engine Size | 2976 cc | 4392 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | V | V |
| Horse Power | 247 HP | 326 HP |
| Engine RPM | 6300 RPM | 6100 RPM |
| Torque | 235 Nm | 447 Nm |
| Torque RPM | 3200 RPM | 3600 RPM |
| Engine Bore Size | 82.5 mm | 92 mm |
| Engine Stroke Size | 92.8 mm | 83 mm |
| Engine Compression Ratio | 10.5:1 | 10.5:1 |
| Top Speed | 243 km/hour | 250 km/hour |
| Acceleration 0-100mph | 6.9 seconds | 6.1 seconds |
| Drive Type | 4WD | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1515 kg | 1895 kg |
| Vehicle Length | 4550 mm | 4830 mm |
| Vehicle Width | 1770 mm | 1860 mm |
| Vehicle Height | 1430 mm | 1380 mm |
| Wheelbase Size | 2660 mm | 2890 mm |
| Fuel Tank Capacity | 66 L | 70 L |
