1999 BMW Z9 vs. 2007 BMW 550
To start off, 2007 BMW 550 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 550 is equipped with a bigger engine. In terms of performance, 2007 BMW 550 (362 HP @ 6300 RPM) has 120 more horse power than 1999 BMW Z9. (242 HP @ 4000 RPM) In normal driving conditions, 2007 BMW 550 should accelerate faster than 1999 BMW Z9.
Both vehicles are rear wheel drive (RWD) - it offers better handling in dry conditions; in addition, if you are looking to drift, both vehicles do the job better than front wheel drive vehicles. 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 70 more torque (in Nm) than 2007 BMW 550. (490 Nm @ 3400 RPM). This means 1999 BMW Z9 will have an easier job in driving up hills or pulling heavy equipment than 2007 BMW 550.
Compare all specifications:
| 1999 BMW Z9 | 2007 BMW 550 | |
| Make | BMW | BMW |
| Model | Z9 | 550 |
| Year Released | 1999 | 2007 |
| Engine Position | Front | Front |
| Engine Size | 3901 cc | 4799 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 242 HP | 362 HP |
| Engine RPM | 4000 RPM | 6300 RPM |
| Torque | 560 Nm | 490 Nm |
| Torque RPM | 1750 RPM | 3400 RPM |
| Fuel Type | Diesel | Gasoline |
| Drive Type | Rear | Rear |
| Number of Seats | 2 seats | 5 seats |
| Vehicle Length | 5010 mm | 4850 mm |
| Vehicle Width | 2010 mm | 1470 mm |
| Vehicle Height | 1360 mm | 1850 mm |
| Wheelbase Size | 3110 mm | 2890 mm |
