2008 Audi S4 vs. 2003 BMW 730
To start off, 2008 Audi S4 is newer by 5 year(s). Which means there will be less support and parts availability for 2003 BMW 730. In addition, the cost of maintenance, including insurance, on 2003 BMW 730 would be higher. At 4,161 cc (8 cylinders), 2008 Audi S4 is equipped with a bigger engine. In terms of performance, 2008 Audi S4 (340 HP @ 7000 RPM) has 112 more horse power than 2003 BMW 730. (228 HP @ 5900 RPM). In normal driving conditions, 2008 Audi S4 should accelerate faster than 2003 BMW 730. With that said, vehicle weight also plays an important factor in acceleration. 2003 BMW 730 weights approximately 85 kg more than 2008 Audi S4.
Because 2008 Audi S4 is four wheel drive (4WD), it will have significant more traction and grip than 2003 BMW 730. In wet, icy, snow, or gravel driving conditions, 2008 Audi S4 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 Audi S4 (410 Nm @ 3500 RPM) has 110 more torque (in Nm) than 2003 BMW 730. (300 Nm @ 3500 RPM). This means 2008 Audi S4 will have an easier job in driving up hills or pulling heavy equipment than 2003 BMW 730.
Compare all specifications:
| 2008 Audi S4 | 2003 BMW 730 | |
| Make | Audi | BMW |
| Model | S4 | 730 |
| Year Released | 2008 | 2003 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 4161 cc | 2999 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 5 valves | 4 valves |
| Horse Power | 340 HP | 228 HP |
| Engine RPM | 7000 RPM | 5900 RPM |
| Torque | 410 Nm | 300 Nm |
| Torque RPM | 3500 RPM | 3500 RPM |
| Engine Bore Size | 84.5 mm | 84.1 mm |
| Engine Stroke Size | 92.8 mm | 90 mm |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | 4WD | Rear |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1705 kg | 1790 kg |
| Vehicle Length | 4590 mm | 5040 mm |
| Vehicle Width | 1780 mm | 1910 mm |
| Vehicle Height | 1430 mm | 1500 mm |
| Wheelbase Size | 2650 mm | 3000 mm |
| Fuel Tank Capacity | 63 L | 63 L |
