1999 Audi A4 vs. 2005 Audi S4
To start off, 2005 Audi S4 is newer by 6 year(s). Which means there will be less support and parts availability for 1999 Audi A4. In addition, the cost of maintenance, including insurance, on 1999 Audi A4 would be higher. At 4,161 cc (8 cylinders), 2005 Audi S4 is equipped with a bigger engine. In terms of performance, 2005 Audi S4 (340 HP @ 6300 RPM) has 93 more horse power than 1999 Audi A4. (247 HP @ 5700 RPM) In normal driving conditions, 2005 Audi S4 should accelerate faster than 1999 Audi A4. With that said, vehicle weight also plays an important factor in acceleration. 2005 Audi S4 weights approximately 580 kg more than 1999 Audi A4. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Compare all specifications:
| 1999 Audi A4 | 2005 Audi S4 | |
| Make | Audi | Audi |
| Model | A4 | S4 |
| Year Released | 1999 | 2005 |
| Body Type | Sedan | Convertible |
| Engine Position | Front | Front |
| Engine Size | 1781 cc | 4161 cc |
| Engine Cylinders | 4 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Horse Power | 247 HP | 340 HP |
| Engine RPM | 5700 RPM | 6300 RPM |
| Engine Bore Size | 81 mm | 85 mm |
| Engine Stroke Size | 86.4 mm | 93 mm |
| Engine Compression Ratio | 9.5:1 | 11.0:1 |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1260 kg | 1840 kg |
| Vehicle Length | 4480 mm | 4580 mm |
| Vehicle Width | 1740 mm | 1780 mm |
| Vehicle Height | 1420 mm | 1400 mm |
| Wheelbase Size | 2620 mm | 2660 mm |
| Fuel Tank Capacity | 62 L | 63 L |
