2005 Audi S4 vs. 2009 BMW 635
To start off, 2009 BMW 635 is newer by 4 year(s). Which means there will be less support and parts availability for 2005 Audi S4. In addition, the cost of maintenance, including insurance, on 2005 Audi S4 would be higher. At 4,163 cc (8 cylinders), 2005 Audi S4 is equipped with a bigger engine. In terms of performance, 2005 Audi S4 (340 HP @ 4000 RPM) has 58 more horse power than 2009 BMW 635. (282 HP @ 4400 RPM). In normal driving conditions, 2005 Audi S4 should accelerate faster than 2009 BMW 635. With that said, vehicle weight also plays an important factor in acceleration. 2005 Audi S4 weights approximately 45 kg more than 2009 BMW 635. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Let's talk about torque, 2009 BMW 635 (581 Nm) has 171 more torque (in Nm) than 2005 Audi S4. (410 Nm). This means 2009 BMW 635 will have an easier job in driving up hills or pulling heavy equipment than 2005 Audi S4.
Compare all specifications:
| 2005 Audi S4 | 2009 BMW 635 | |
| Make | Audi | BMW |
| Model | S4 | 635 |
| Year Released | 2005 | 2009 |
| Body Type | Sedan | Coupe |
| Engine Position | Front | Front |
| Engine Size | 4163 cc | 2993 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 5 valves | 4 valves |
| Horse Power | 340 HP | 282 HP |
| Engine RPM | 4000 RPM | 4400 RPM |
| Torque | 410 Nm | 581 Nm |
| Engine Bore Size | 85 mm | 84 mm |
| Engine Stroke Size | 93 mm | 90 mm |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1770 kg | 1725 kg |
| Vehicle Length | 4550 mm | 4830 mm |
| Vehicle Width | 1770 mm | 1860 mm |
| Vehicle Height | 1430 mm | 1380 mm |
| Wheelbase Size | 2770 mm | 2790 mm |
| Fuel Consumption Overall | 11.8 L/100km | 7.2 L/100km |
| Fuel Tank Capacity | 66 L | 70 L |
