2006 Audi RS4 vs. 2006 BMW 645
To start off, both 2006 Audi RS4 and 2006 BMW 645 were released in the same year (2006). Therefore the support and the availability on parts for both vehicles should be relatively similar. At 4,398 cc (8 cylinders), 2006 BMW 645 is equipped with a bigger engine. In terms of performance, 2006 Audi RS4 (420 HP @ 8250 RPM) has 92 more horse power than 2006 BMW 645. (328 HP @ 6100 RPM). In normal driving conditions, 2006 Audi RS4 should accelerate faster than 2006 BMW 645. With that said, vehicle weight also plays an important factor in acceleration. 2006 BMW 645 weights approximately 261 kg more than 2006 Audi RS4.
Because 2006 Audi RS4 is four wheel drive (4WD), it will have significant more traction and grip than 2006 BMW 645. In wet, icy, snow, or gravel driving conditions, 2006 Audi RS4 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 RS4 (583 Nm @ 5500 RPM) has 133 more torque (in Nm) than 2006 BMW 645. (450 Nm @ 3600 RPM). This means 2006 Audi RS4 will have an easier job in driving up hills or pulling heavy equipment than 2006 BMW 645. 2006 BMW 645 has automatic transmission and 2006 Audi RS4 has manual transmission. 2006 Audi RS4 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2006 BMW 645 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2006 Audi RS4 | 2006 BMW 645 | |
| Make | Audi | BMW |
| Model | RS4 | 645 |
| Year Released | 2006 | 2006 |
| Body Type | Sedan | Coupe |
| Engine Position | Front | Front |
| Engine Size | 4163 cc | 4398 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Horse Power | 420 HP | 328 HP |
| Engine RPM | 8250 RPM | 6100 RPM |
| Torque | 583 Nm | 450 Nm |
| Torque RPM | 5500 RPM | 3600 RPM |
| Top Speed | 245 km/hour | 250 km/hour |
| Drive Type | 4WD | Rear |
| Transmission Type | Manual | Automatic |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1549 kg | 1810 kg |
| Vehicle Length | 360 mm | 4830 mm |
| Vehicle Height | 360 mm | 1380 mm |
| Wheelbase Size | 360 mm | 2790 mm |
