1999 BMW Z9 vs. 2007 Audi A4
To start off, 2007 Audi A4 is newer by 8 year(s). Which means there will be less support and parts availability for 1999 BMW Z9. In addition, the cost of maintenance, including insurance, on 1999 BMW Z9 would be higher. At 4,397 cc (8 cylinders), 1999 BMW Z9 is equipped with a bigger engine. In terms of performance, 1999 BMW Z9 (242 HP @ 7400 RPM) has 25 more horse power than 2007 Audi A4. (217 HP @ 5900 RPM). In normal driving conditions, 1999 BMW Z9 should accelerate faster than 2007 Audi A4. With that said, vehicle weight also plays an important factor in acceleration. 1999 BMW Z9 weights approximately 35 kg more than 2007 Audi A4. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2007 Audi A4 is four wheel drive (4WD), it will have significant more traction and grip than 1999 BMW Z9. In wet, icy, snow, or gravel driving conditions, 2007 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, 1999 BMW Z9 (560 Nm @ 1750 RPM) has 260 more torque (in Nm) than 2007 Audi A4. (300 Nm @ 2200 RPM). This means 1999 BMW Z9 will have an easier job in driving up hills or pulling heavy equipment than 2007 Audi A4.
Compare all specifications:
| 1999 BMW Z9 | 2007 Audi A4 | |
| Make | BMW | Audi |
| Model | Z9 | A4 |
| Year Released | 1999 | 2007 |
| Body Type | Coupe | Sedan |
| Engine Position | Front | Front |
| Engine Size | 4397 cc | 1984 cc |
| Engine Cylinders | 8 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Horse Power | 242 HP | 217 HP |
| Engine RPM | 7400 RPM | 5900 RPM |
| Torque | 560 Nm | 300 Nm |
| Torque RPM | 1750 RPM | 2200 RPM |
| Engine Compression Ratio | 18.0:1 | 10.5:1 |
| Drive Type | Rear | 4WD |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1630 kg | 1595 kg |
| Vehicle Length | 5010 mm | 4550 mm |
| Vehicle Width | 1980 mm | 1780 mm |
| Vehicle Height | 1350 mm | 1400 mm |
| Wheelbase Size | 3060 mm | 2660 mm |
