2006 Audi A4 vs. 2005 BMW 645
To start off, 2006 Audi A4 is newer by 1 year(s). Which means there will be less support and parts availability for 2005 BMW 645. In addition, the cost of maintenance, including insurance, on 2005 BMW 645 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) has 129 more horse power than 2006 Audi A4. (197 HP) In normal driving conditions, 2005 BMW 645 should accelerate faster than 2006 Audi A4. With that said, vehicle weight also plays an important factor in acceleration. 2005 BMW 645 weights approximately 15 kg more than 2006 Audi A4. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2005 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 2005 BMW 645. However, in wet, icy, snow, or gravel driving conditions, 2006 Audi A4, 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, 2005 BMW 645 (447 Nm) has 167 more torque (in Nm) than 2006 Audi A4. (280 Nm). This means 2005 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 2006 Audi A4. 2006 Audi A4 has automatic transmission and 2005 BMW 645 has manual transmission. 2005 BMW 645 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2006 Audi A4 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2006 Audi A4 | 2005 BMW 645 | |
| Make | Audi | BMW |
| Model | A4 | 645 |
| Year Released | 2006 | 2005 |
| Body Type | Station Wagon | Convertible |
| Engine Position | Front | Front |
| Engine Size | 1984 cc | 4392 cc |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 197 HP | 326 HP |
| Torque | 280 Nm | 447 Nm |
| Engine Compression Ratio | 10.5:1 | 10.5:1 |
| Fuel Type | Gasoline - Premium | Gasoline - Premium |
| Top Speed | 225 km/hour | 250 km/hour |
| Acceleration 0-100mph | 7.6 seconds | 6.1 seconds |
| Drive Type | Front | Rear |
| Transmission Type | Automatic | Manual |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 5 doors | 2 doors |
| Vehicle Weight | 1880 kg | 1895 kg |
| Vehicle Length | 4590 mm | 4830 mm |
| Vehicle Width | 1780 mm | 1860 mm |
| Vehicle Height | 1430 mm | 1380 mm |
| Wheelbase Size | 2650 mm | 2890 mm |
| Fuel Consumption Overall | 8.1 L/100km | 12.8 L/100km |
| Fuel Tank Capacity | 70 L | 70 L |
