2009 Audi A4 vs. 2009 Audi S4
To start off, both 2009 Audi A4 and 2009 Audi S4 were released in the same year (2009). Therefore the support and the availability on parts for both vehicles should be relatively similar. 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 140 more horse power than 2009 Audi A4. (200 HP @ 5100 RPM) In normal driving conditions, 2009 Audi S4 should accelerate faster than 2009 Audi A4.
Both vehicles are four wheel drive (4WD) - it offers better handling, traction, and control in all driving conditions compared with front wheel drive or rear wheel drive vehicles. 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 129 more torque (in Nm) than 2009 Audi A4. (281 Nm @ 1800 RPM). This means 2009 Audi S4 will have an easier job in driving up hills or pulling heavy equipment than 2009 Audi A4.
Compare all specifications:
| 2009 Audi A4 | 2009 Audi S4 | |
| Make | Audi | Audi |
| Model | A4 | S4 |
| Year Released | 2009 | 2009 |
| Body Type | Convertible | Convertible |
| Engine Position | Front | Front |
| Engine Size | 1983 cc | 4161 cc |
| Engine Cylinders | 4 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 5 valves |
| Horse Power | 200 HP | 340 HP |
| Engine RPM | 5100 RPM | 6800 RPM |
| Torque | 281 Nm | 410 Nm |
| Torque RPM | 1800 RPM | 3500 RPM |
| Engine Bore Size | 82.5 mm | 84.5 mm |
| Engine Stroke Size | 92.8 mm | 92.8 mm |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | 4WD | 4WD |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 4 seats | 4 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 930 kg | 930 kg |
| Vehicle Length | 4580 mm | 4580 mm |
| Vehicle Width | 1780 mm | 1780 mm |
| Vehicle Height | 1400 mm | 1400 mm |
| Wheelbase Size | 2660 mm | 2660 mm |
| Fuel Consumption | 8.7 L/100km | 11.2 L/100km |
| Fuel Consumption City | 11.2 L/100km | 16.8 L/100km |
| Fuel Consumption Overall | 10.2 L/100km | 14.7 L/100km |
| Fuel Tank Capacity | 34 L | 63 L |
