2009 BMW X6 vs. 1999 BMW 730
To start off, 2009 BMW X6 is newer by 10 year(s). Which means there will be less support and parts availability for 1999 BMW 730. In addition, the cost of maintenance, including insurance, on 1999 BMW 730 would be higher. At 4,395 cc (8 cylinders), 2009 BMW X6 is equipped with a bigger engine. In terms of performance, 2009 BMW X6 (401 HP @ 5500 RPM) has 211 more horse power than 1999 BMW 730. (190 HP @ 5300 RPM). In normal driving conditions, 2009 BMW X6 should accelerate faster than 1999 BMW 730. With that said, vehicle weight also plays an important factor in acceleration. 2009 BMW X6 weights approximately 519 kg more than 1999 BMW 730. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2009 BMW X6 is four wheel drive (4WD), it will have significant more traction and grip than 1999 BMW 730. In wet, icy, snow, or gravel driving conditions, 2009 BMW X6 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, 2009 BMW X6 (610 Nm @ 1750 RPM) has 330 more torque (in Nm) than 1999 BMW 730. (280 Nm @ 3950 RPM). This means 2009 BMW X6 will have an easier job in driving up hills or pulling heavy equipment than 1999 BMW 730.
Compare all specifications:
| 2009 BMW X6 | 1999 BMW 730 | |
| Make | BMW | BMW |
| Model | X6 | 730 |
| Year Released | 2009 | 1999 |
| Body Type | SUV | Sedan |
| Engine Position | Front | Front |
| Engine Size | 4395 cc | 2793 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 401 HP | 190 HP |
| Engine RPM | 5500 RPM | 5300 RPM |
| Torque | 610 Nm | 280 Nm |
| Torque RPM | 1750 RPM | 3950 RPM |
| Engine Bore Size | 89 mm | 84 mm |
| Engine Stroke Size | 88.3 mm | 84 mm |
| Engine Compression Ratio | 10.0:1 | 10.2:1 |
| Fuel Type | Gasoline - Premium | Gasoline |
| Drive Type | 4WD | Rear |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 5 doors | 4 doors |
| Vehicle Weight | 2265 kg | 1746 kg |
| Vehicle Length | 4880 mm | 5130 mm |
| Vehicle Width | 1990 mm | 1870 mm |
| Vehicle Height | 1700 mm | 1430 mm |
| Wheelbase Size | 2940 mm | 2940 mm |
| Fuel Tank Capacity | 85 L | 90 L |
