2008 Audi A5 vs. 2006 BMW 645
To start off, 2008 Audi A5 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 66 more horse power than 2008 Audi A5. (262 HP @ 6500 RPM) In normal driving conditions, 2006 BMW 645 should accelerate faster than 2008 Audi A5. With that said, vehicle weight also plays an important factor in acceleration. 2006 BMW 645 weights approximately 205 kg more than 2008 Audi A5. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2006 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 2006 BMW 645. However, in wet, icy, snow, or gravel driving conditions, 2008 Audi A5, 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, 2006 BMW 645 (450 Nm @ 3600 RPM) has 120 more torque (in Nm) than 2008 Audi A5. (330 Nm @ 3000 RPM). This means 2006 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 2008 Audi A5.
Compare all specifications:
| 2008 Audi A5 | 2006 BMW 645 | |
| Make | Audi | BMW |
| Model | A5 | 645 |
| Year Released | 2008 | 2006 |
| Body Type | Coupe | Convertible |
| Engine Position | Front | Front |
| Engine Size | 3197 cc | 4398 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 262 HP | 328 HP |
| Engine RPM | 6500 RPM | 6100 RPM |
| Torque | 330 Nm | 450 Nm |
| Torque RPM | 3000 RPM | 3600 RPM |
| Engine Compression Ratio | 10.5:1 | 10.0:1 |
| Fuel Type | Gasoline - Premium | Gasoline - Premium |
| Top Speed | 250 km/hour | 250 km/hour |
| Acceleration 0-100mph | 6.1 seconds | 6.4 seconds |
| Drive Type | Front | Rear |
| Number of Seats | 4 seats | 4 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1610 kg | 1815 kg |
| Vehicle Length | 4630 mm | 4830 mm |
| Vehicle Width | 1860 mm | 1860 mm |
| Vehicle Height | 1380 mm | 1380 mm |
| Wheelbase Size | 2760 mm | 2790 mm |
| Fuel Consumption Overall | 8.7 L/100km | 12.8 L/100km |
| Fuel Tank Capacity | 80 L | 70 L |
