1996 Audi S6 vs. 2008 BMW 645
To start off, 2008 BMW 645 is newer by 12 year(s). Which means there will be less support and parts availability for 1996 Audi S6. In addition, the cost of maintenance, including insurance, on 1996 Audi S6 would be higher. At 4,398 cc (8 cylinders), 2008 BMW 645 is equipped with a bigger engine. In terms of performance, 2008 BMW 645 (328 HP @ 6100 RPM) has 6 more horse power than 1996 Audi S6. (322 HP @ 6500 RPM) In normal driving conditions, 2008 BMW 645 should accelerate faster than 1996 Audi S6. With that said, vehicle weight also plays an important factor in acceleration. 1996 Audi S6 weights approximately 55 kg more than 2008 BMW 645.
Because 1996 Audi S6 is four wheel drive (4WD), it will have significant more traction and grip than 2008 BMW 645. In wet, icy, snow, or gravel driving conditions, 1996 Audi S6 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, 2008 BMW 645 (450 Nm @ 3600 RPM) has 50 more torque (in Nm) than 1996 Audi S6. (400 Nm @ 3500 RPM). This means 2008 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 1996 Audi S6.
Compare all specifications:
| 1996 Audi S6 | 2008 BMW 645 | |
| Make | Audi | BMW |
| Model | S6 | 645 |
| Year Released | 1996 | 2008 |
| Body Type | Station Wagon | Coupe |
| Engine Position | Front | Front |
| Engine Size | 4172 cc | 4398 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 322 HP | 328 HP |
| Engine RPM | 6500 RPM | 6100 RPM |
| Torque | 400 Nm | 450 Nm |
| Torque RPM | 3500 RPM | 3600 RPM |
| Engine Bore Size | 84.5 mm | 92.1 mm |
| Engine Stroke Size | 93 mm | 82.7 mm |
| Engine Compression Ratio | 11.6:1 | 10.0:1 |
| Acceleration 0-100mph | 6 seconds | 5.6 seconds |
| Drive Type | 4WD | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 5 doors | 2 doors |
| Vehicle Weight | 1745 kg | 1690 kg |
| Vehicle Length | 4800 mm | 4830 mm |
| Vehicle Width | 1810 mm | 1860 mm |
| Vehicle Height | 1450 mm | 1380 mm |
| Wheelbase Size | 2700 mm | 2790 mm |
| Fuel Consumption Overall | 14.9 L/100km | 11.8 L/100km |
| Fuel Tank Capacity | 80 L | 70 L |
