2006 BMW X5 vs. 1991 Renault 21
To start off, 2006 BMW X5 is newer by 15 year(s). Which means there will be less support and parts availability for 1991 Renault 21. In addition, the cost of maintenance, including insurance, on 1991 Renault 21 would be higher. At 2,979 cc (6 cylinders), 2006 BMW X5 is equipped with a bigger engine. In terms of performance, 2006 BMW X5 (228 HP @ 3500 RPM) has 153 more horse power than 1991 Renault 21. (75 HP @ 5000 RPM). In normal driving conditions, 2006 BMW X5 should accelerate faster than 1991 Renault 21. With that said, vehicle weight also plays an important factor in acceleration. 2006 BMW X5 weights approximately 610 kg more than 1991 Renault 21. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2006 BMW X5 is four wheel drive (4WD), it will have significant more traction and grip than 1991 Renault 21. In wet, icy, snow, or gravel driving conditions, 2006 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, 2006 BMW X5 (300 Nm @ 3500 RPM) has 171 more torque (in Nm) than 1991 Renault 21. (129 Nm @ 3250 RPM). This means 2006 BMW X5 will have an easier job in driving up hills or pulling heavy equipment than 1991 Renault 21.
Compare all specifications:
| 2006 BMW X5 | 1991 Renault 21 | |
| Make | BMW | Renault |
| Model | X5 | 21 |
| Year Released | 2006 | 1991 |
| Engine Position | Front | Front |
| Engine Size | 2979 cc | 1721 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 2 valves |
| Horse Power | 228 HP | 75 HP |
| Engine RPM | 3500 RPM | 5000 RPM |
| Torque | 300 Nm | 129 Nm |
| Torque RPM | 3500 RPM | 3250 RPM |
| Engine Bore Size | 84 mm | 81 mm |
| Engine Stroke Size | 89.6 mm | 83.5 mm |
| Engine Compression Ratio | 10.2:1 | 9.2:1 |
| Fuel Type | Gasoline - Premium | Gasoline |
| Drive Type | 4WD | Front |
| Transmission Type | Manual | Manual |
| Vehicle Weight | 1630 kg | 1020 kg |
| Vehicle Length | 4670 mm | 4650 mm |
| Vehicle Width | 1880 mm | 1720 mm |
| Vehicle Height | 1720 mm | 1430 mm |
| Wheelbase Size | 2830 mm | 2820 mm |
