2001 BMW Z18 vs. 2007 BMW 550
To start off, 2007 BMW 550 is newer by 6 year(s). Which means there will be less support and parts availability for 2001 BMW Z18. In addition, the cost of maintenance, including insurance, on 2001 BMW Z18 would be higher. At 4,797 cc, 2007 BMW 550 is equipped with a bigger engine. In terms of performance, 2007 BMW 550 (657 HP @ 3400 RPM) has 334 more horse power than 2001 BMW Z18. (323 HP @ 7400 RPM) In normal driving conditions, 2007 BMW 550 should accelerate faster than 2001 BMW Z18. With that said, vehicle weight also plays an important factor in acceleration. 2001 BMW Z18 weights approximately 40 kg more than 2007 BMW 550.
Because 2001 BMW Z18 is four wheel drive (4WD), it will have significant more traction and grip than 2007 BMW 550. In wet, icy, snow, or gravel driving conditions, 2001 BMW Z18 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, 2007 BMW 550 (490 Nm) has 150 more torque (in Nm) than 2001 BMW Z18. (340 Nm). This means 2007 BMW 550 will have an easier job in driving up hills or pulling heavy equipment than 2001 BMW Z18.
Compare all specifications:
| 2001 BMW Z18 | 2007 BMW 550 | |
| Make | BMW | BMW |
| Model | Z18 | 550 |
| Year Released | 2001 | 2007 |
| Engine Position | Front | Front |
| Engine Size | 4400 cc | 4797 cc |
| Horse Power | 323 HP | 657 HP |
| Engine RPM | 7400 RPM | 3400 RPM |
| Torque | 340 Nm | 490 Nm |
| Drive Type | 4WD | Rear |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 2 seats | 5 seats |
| Vehicle Weight | 1700 kg | 1660 kg |
| Wheelbase Size | 2730 mm | 2890 mm |
| Fuel Tank Capacity | 63 L | 70 L |
