1999 Audi RS4 vs. 2006 BMW Z4
To start off, 2006 BMW Z4 is newer by 7 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 2,671 cc (6 cylinders), 1999 Audi RS4 is equipped with a bigger engine. In terms of performance, 1999 Audi RS4 (250 HP @ 6100 RPM) has 82 more horse power than 2006 BMW Z4. (168 HP @ 6250 RPM). In normal driving conditions, 1999 Audi RS4 should accelerate faster than 2006 BMW Z4. With that said, vehicle weight also plays an important factor in acceleration. 1999 Audi RS4 weights approximately 295 kg more than 2006 BMW Z4. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 1999 Audi RS4 is four wheel drive (4WD), it will have significant more traction and grip than 2006 BMW Z4. In wet, icy, snow, or gravel driving conditions, 1999 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. 2006 BMW Z4 has automatic transmission and 1999 Audi RS4 has manual transmission. 1999 Audi RS4 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2006 BMW Z4 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 1999 Audi RS4 | 2006 BMW Z4 | |
| Make | Audi | BMW |
| Model | RS4 | Z4 |
| Year Released | 1999 | 2006 |
| Body Type | Sedan | Convertible |
| Engine Position | Front | Front |
| Engine Size | 2671 cc | 2170 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | V | in-line |
| Horse Power | 250 HP | 168 HP |
| Engine RPM | 6100 RPM | 6250 RPM |
| Engine Bore Size | 81.1 mm | 80 mm |
| Engine Stroke Size | 86.4 mm | 72 mm |
| Engine Compression Ratio | 9.0:1 | 10.8:1 |
| Acceleration 0-100mph | 4.9 seconds | 7.7 seconds |
| Drive Type | 4WD | Rear |
| Transmission Type | Manual | Automatic |
| Number of Seats | 5 seats | 2 seats |
| Number of Doors | 5 doors | 2 doors |
| Vehicle Weight | 1620 kg | 1325 kg |
| Vehicle Length | 4530 mm | 4100 mm |
| Vehicle Width | 1810 mm | 1790 mm |
| Vehicle Height | 1390 mm | 1310 mm |
| Wheelbase Size | 2610 mm | 2500 mm |
| Fuel Tank Capacity | 62 L | 55 L |
