1991 BMW 518 vs. 2005 BMW X5
To start off, 2005 BMW X5 is newer by 14 year(s). Which means there will be less support and parts availability for 1991 BMW 518. In addition, the cost of maintenance, including insurance, on 1991 BMW 518 would be higher. At 2,926 cc (6 cylinders), 2005 BMW X5 is equipped with a bigger engine. In terms of performance, 2005 BMW X5 (215 HP @ 4000 RPM) has 101 more horse power than 1991 BMW 518. (114 HP @ 5500 RPM) In normal driving conditions, 2005 BMW X5 should accelerate faster than 1991 BMW 518. With that said, vehicle weight also plays an important factor in acceleration. 2005 BMW X5 weights approximately 1010 kg more than 1991 BMW 518. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2005 BMW X5 is four wheel drive (4WD), it will have significant more traction and grip than 1991 BMW 518. In wet, icy, snow, or gravel driving conditions, 2005 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, 2005 BMW X5 (520 Nm @ 2000 RPM) has 355 more torque (in Nm) than 1991 BMW 518. (165 Nm @ 4250 RPM). This means 2005 BMW X5 will have an easier job in driving up hills or pulling heavy equipment than 1991 BMW 518.
Compare all specifications:
| 1991 BMW 518 | 2005 BMW X5 | |
| Make | BMW | BMW |
| Model | 518 | X5 |
| Year Released | 1991 | 2005 |
| Body Type | Sedan | SUV |
| Engine Position | Front | Front |
| Engine Size | 1766 cc | 2926 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 114 HP | 215 HP |
| Engine RPM | 5500 RPM | 4000 RPM |
| Torque | 165 Nm | 520 Nm |
| Torque RPM | 4250 RPM | 2000 RPM |
| Engine Bore Size | 84 mm | 84 mm |
| Engine Stroke Size | 81 mm | 90 mm |
| Engine Compression Ratio | 8.8:1 | 18.0:1 |
| Fuel Type | Gasoline | Diesel |
| Drive Type | Rear | 4WD |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Weight | 1160 kg | 2170 kg |
| Vehicle Length | 4730 mm | 4670 mm |
| Vehicle Width | 1760 mm | 1880 mm |
| Vehicle Height | 1420 mm | 1720 mm |
| Wheelbase Size | 2770 mm | 2830 mm |
