1999 Audi RS4 vs. 2003 Porsche 911
To start off, 2003 Porsche 911 is newer by 4 year(s). Which means there will be less support and parts availability for 1999 Audi RS4. In addition, the cost of maintenance, including insurance, on 1999 Audi RS4 would be higher. At 3,600 cc (6 cylinders), 2003 Porsche 911 is equipped with a bigger engine. In terms of performance, 2003 Porsche 911 (443 HP @ 6000 RPM) has 193 more horse power than 1999 Audi RS4. (250 HP @ 6100 RPM) In normal driving conditions, 2003 Porsche 911 should accelerate faster than 1999 Audi RS4. With that said, vehicle weight also plays an important factor in acceleration. 2003 Porsche 911 weights approximately 84 kg more than 1999 Audi RS4. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
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.
Compare all specifications:
| 1999 Audi RS4 | 2003 Porsche 911 | |
| Make | Audi | Porsche |
| Model | RS4 | 911 |
| Year Released | 1999 | 2003 |
| Body Type | Sedan | Convertible |
| Engine Position | Front | Rear |
| Engine Size | 2671 cc | 3600 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | V | boxer |
| Horse Power | 250 HP | 443 HP |
| Engine RPM | 6100 RPM | 6000 RPM |
| Engine Bore Size | 81.1 mm | 100 mm |
| Engine Stroke Size | 86.4 mm | 76.4 mm |
| Engine Compression Ratio | 9.0:1 | 9.4:1 |
| Acceleration 0-100mph | 4.9 seconds | 4.6 seconds |
| Drive Type | 4WD | 4WD |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 2 seats |
| Number of Doors | 5 doors | 2 doors |
| Vehicle Weight | 1620 kg | 1704 kg |
| Vehicle Length | 4530 mm | 4440 mm |
| Vehicle Width | 1810 mm | 1840 mm |
| Vehicle Height | 1390 mm | 1300 mm |
| Wheelbase Size | 2610 mm | 2360 mm |
| Fuel Tank Capacity | 62 L | 64 L |
