2003 Audi RS4 vs. 2007 BMW Z4
To start off, 2007 BMW Z4 is newer by 4 year(s). Which means there will be less support and parts availability for 2003 Audi RS4. In addition, the cost of maintenance, including insurance, on 2003 Audi RS4 would be higher. At 2,671 cc (6 cylinders), 2003 Audi RS4 is equipped with a bigger engine. In terms of performance, 2003 Audi RS4 (377 HP @ 6300 RPM) has 229 more horse power than 2007 BMW Z4. (148 HP @ 6200 RPM). In normal driving conditions, 2003 Audi RS4 should accelerate faster than 2007 BMW Z4. With that said, vehicle weight also plays an important factor in acceleration. 2003 Audi RS4 weights approximately 290 kg more than 2007 BMW Z4. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2003 Audi RS4 is four wheel drive (4WD), it will have significant more traction and grip than 2007 BMW Z4. In wet, icy, snow, or gravel driving conditions, 2003 Audi RS4 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, 2003 Audi RS4 (449 Nm @ 2500 RPM) has 249 more torque (in Nm) than 2007 BMW Z4. (200 Nm @ 3600 RPM). This means 2003 Audi RS4 will have an easier job in driving up hills or pulling heavy equipment than 2007 BMW Z4.
Compare all specifications:
| 2003 Audi RS4 | 2007 BMW Z4 | |
| Make | Audi | BMW |
| Model | RS4 | Z4 |
| Year Released | 2003 | 2007 |
| Body Type | Sedan | Convertible |
| Engine Position | Front | Front |
| Engine Size | 2671 cc | 1993 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 5 valves | 4 valves |
| Horse Power | 377 HP | 148 HP |
| Engine RPM | 6300 RPM | 6200 RPM |
| Torque | 449 Nm | 200 Nm |
| Torque RPM | 2500 RPM | 3600 RPM |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | 4WD | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 2 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1585 kg | 1295 kg |
| Vehicle Length | 4480 mm | 4100 mm |
| Vehicle Width | 1740 mm | 1310 mm |
| Vehicle Height | 1450 mm | 1790 mm |
| Wheelbase Size | 2610 mm | 2500 mm |
| Fuel Tank Capacity | 55 L | 55 L |
