2003 Audi A3 vs. 2005 Audi A4
To start off, 2005 Audi A4 is newer by 2 year(s). Which means there will be less support and parts availability for 2003 Audi A3. In addition, the cost of maintenance, including insurance, on 2003 Audi A3 would be higher. At 2,983 cc (6 cylinders), 2005 Audi A4 is equipped with a bigger engine. In terms of performance, 2005 Audi A4 (247 HP @ 6300 RPM) has 134 more horse power than 2003 Audi A3. (113 HP @ 5800 RPM) In normal driving conditions, 2005 Audi A4 should accelerate faster than 2003 Audi A3.
Because 2005 Audi A4 is four wheel drive (4WD), it will have significant more traction and grip than 2003 Audi A3. In wet, icy, snow, or gravel driving conditions, 2005 Audi A4 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, 2005 Audi A4 (320 Nm @ 3250 RPM) has 164 more torque (in Nm) than 2003 Audi A3. (156 Nm @ 4000 RPM). This means 2005 Audi A4 will have an easier job in driving up hills or pulling heavy equipment than 2003 Audi A3.
Compare all specifications:
| 2003 Audi A3 | 2005 Audi A4 | |
| Make | Audi | Audi |
| Model | A3 | A4 |
| Year Released | 2003 | 2005 |
| Body Type | Hatchback | Sedan |
| Engine Position | Front | Front |
| Engine Size | 1598 cc | 2983 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 5 valves |
| Horse Power | 113 HP | 247 HP |
| Engine RPM | 5800 RPM | 6300 RPM |
| Torque | 156 Nm | 320 Nm |
| Torque RPM | 4000 RPM | 3250 RPM |
| Engine Bore Size | 76.5 mm | 84.5 mm |
| Engine Stroke Size | 86.9 mm | 92.8 mm |
| Fuel Type | Gasoline - Premium | Gasoline |
| Drive Type | Front | 4WD |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 3 doors | 4 doors |
| Vehicle Length | 4210 mm | 4590 mm |
| Vehicle Width | 1770 mm | 1780 mm |
| Vehicle Height | 1430 mm | 1430 mm |
| Wheelbase Size | 2660 mm | 2660 mm |
