1999 BMW Z9 vs. 2007 BMW X5
To start off, 2007 BMW X5 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 4,799 cc (8 cylinders), 2007 BMW X5 is equipped with a bigger engine. In terms of performance, 2007 BMW X5 (350 HP @ 6300 RPM) has 108 more horse power than 1999 BMW Z9. (242 HP @ 7400 RPM) In normal driving conditions, 2007 BMW X5 should accelerate faster than 1999 BMW Z9. With that said, vehicle weight also plays an important factor in acceleration. 2007 BMW X5 weights approximately 570 kg more than 1999 BMW Z9. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2007 BMW X5 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 BMW X5 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 84 more torque (in Nm) than 2007 BMW X5. (476 Nm @ 3400 RPM). This means 1999 BMW Z9 will have an easier job in driving up hills or pulling heavy equipment than 2007 BMW X5.
Compare all specifications:
| 1999 BMW Z9 | 2007 BMW X5 | |
| Make | BMW | BMW |
| Model | Z9 | X5 |
| Year Released | 1999 | 2007 |
| Body Type | Coupe | SUV |
| Engine Position | Front | Front |
| Engine Size | 4397 cc | 4799 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Horse Power | 242 HP | 350 HP |
| Engine RPM | 7400 RPM | 6300 RPM |
| Torque | 560 Nm | 476 Nm |
| Torque RPM | 1750 RPM | 3400 RPM |
| Drive Type | Rear | 4WD |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Weight | 1630 kg | 2200 kg |
| Vehicle Length | 5010 mm | 4860 mm |
| Vehicle Width | 1980 mm | 1940 mm |
| Vehicle Height | 1350 mm | 1770 mm |
| Wheelbase Size | 3060 mm | 2940 mm |
