2003 Audi A4 vs. 2009 Audi S4
To start off, 2009 Audi S4 is newer by 6 year(s). Which means there will be less support and parts availability for 2003 Audi A4. In addition, the cost of maintenance, including insurance, on 2003 Audi A4 would be higher. At 4,161 cc (8 cylinders), 2009 Audi S4 is equipped with a bigger engine. In terms of performance, 2009 Audi S4 (340 HP @ 6800 RPM) has 227 more horse power than 2003 Audi A4. (113 HP @ 5800 RPM) In normal driving conditions, 2009 Audi S4 should accelerate faster than 2003 Audi A4. With that said, vehicle weight also plays an important factor in acceleration. 2003 Audi A4 weights approximately 365 kg more than 2009 Audi S4.
Because 2009 Audi S4 is four wheel drive (4WD), it will have significant more traction and grip than 2003 Audi A4. In wet, icy, snow, or gravel driving conditions, 2009 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, 2009 Audi S4 (410 Nm @ 3500 RPM) has 262 more torque (in Nm) than 2003 Audi A4. (148 Nm @ 3800 RPM). This means 2009 Audi S4 will have an easier job in driving up hills or pulling heavy equipment than 2003 Audi A4. 2009 Audi S4 has automatic transmission and 2003 Audi A4 has manual transmission. 2003 Audi A4 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2009 Audi S4 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2003 Audi A4 | 2009 Audi S4 | |
| Make | Audi | Audi |
| Model | A4 | S4 |
| Year Released | 2003 | 2009 |
| Body Type | Sedan | Convertible |
| Engine Position | Front | Front |
| Engine Size | 1595 cc | 4161 cc |
| Engine Cylinders | 4 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 2 valves | 5 valves |
| Horse Power | 113 HP | 340 HP |
| Engine RPM | 5800 RPM | 6800 RPM |
| Torque | 148 Nm | 410 Nm |
| Torque RPM | 3800 RPM | 3500 RPM |
| Engine Bore Size | 81.1 mm | 84.5 mm |
| Engine Stroke Size | 77.4 mm | 92.8 mm |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Front | 4WD |
| Transmission Type | Manual | Automatic |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1295 kg | 930 kg |
| Vehicle Length | 4590 mm | 4580 mm |
| Vehicle Width | 1770 mm | 1780 mm |
| Vehicle Height | 1430 mm | 1400 mm |
| Wheelbase Size | 2660 mm | 2660 mm |
| Fuel Tank Capacity | 70 L | 63 L |
