2006 BMW 645 vs. 2008 Audi A6
To start off, 2008 Audi A6 is newer by 2 year(s). Which means there will be less support and parts availability for 2006 BMW 645. In addition, the cost of maintenance, including insurance, on 2006 BMW 645 would be higher. At 4,398 cc (8 cylinders), 2006 BMW 645 is equipped with a bigger engine. In terms of performance, 2006 BMW 645 (328 HP @ 6100 RPM) has 150 more horse power than 2008 Audi A6. (178 HP @ 4000 RPM). In normal driving conditions, 2006 BMW 645 should accelerate faster than 2008 Audi A6. With that said, vehicle weight also plays an important factor in acceleration. 2008 Audi A6 weights approximately 80 kg more than 2006 BMW 645.
Because 2008 Audi A6 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, 2008 Audi A6 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 BMW 645 (450 Nm @ 3600 RPM) has 80 more torque (in Nm) than 2008 Audi A6. (370 Nm @ 1500 RPM). This means 2006 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 2008 Audi A6.
Compare all specifications:
| 2006 BMW 645 | 2008 Audi A6 | |
| Make | BMW | Audi |
| Model | 645 | A6 |
| Year Released | 2006 | 2008 |
| Body Type | Coupe | Station Wagon |
| Engine Position | Front | Front |
| Engine Size | 4398 cc | 2496 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 5 valves |
| Horse Power | 328 HP | 178 HP |
| Engine RPM | 6100 RPM | 4000 RPM |
| Torque | 450 Nm | 370 Nm |
| Torque RPM | 3600 RPM | 1500 RPM |
| Engine Compression Ratio | 10.0:1 | 19.0:1 |
| Fuel Type | Gasoline | Diesel |
| Top Speed | 250 km/hour | 207 km/hour |
| Acceleration 0-100mph | 5.6 seconds | 9.5 seconds |
| Drive Type | Rear | 4WD |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Weight | 1810 kg | 1890 kg |
| Vehicle Length | 4830 mm | 4820 mm |
| Vehicle Width | 1860 mm | 1860 mm |
| Vehicle Height | 1380 mm | 1560 mm |
| Wheelbase Size | 2790 mm | 2760 mm |
| Fuel Consumption Overall | 13.3 L/100km | 9.2 L/100km |
| Fuel Tank Capacity | 70 L | 70 L |
