2006 BMW X5 vs. 1981 Monteverdi Sierra
To start off, 2006 BMW X5 is newer by 25 year(s). Which means there will be less support and parts availability for 1981 Monteverdi Sierra. In addition, the cost of maintenance, including insurance, on 1981 Monteverdi Sierra would be higher. At 5,210 cc (8 cylinders), 1981 Monteverdi Sierra is equipped with a bigger engine. In terms of performance, 2006 BMW X5 (228 HP @ 3500 RPM) has 78 more horse power than 1981 Monteverdi Sierra. (150 HP @ 4000 RPM). In normal driving conditions, 2006 BMW X5 should accelerate faster than 1981 Monteverdi Sierra.
Compare all specifications:
| 2006 BMW X5 | 1981 Monteverdi Sierra | |
| Make | BMW | Monteverdi |
| Model | X5 | Sierra |
| Year Released | 2006 | 1981 |
| Engine Position | Front | Front |
| Engine Size | 2979 cc | 5210 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 228 HP | 150 HP |
| Engine RPM | 3500 RPM | 4000 RPM |
| Fuel Type | Gasoline - Premium | Gasoline |
| Vehicle Length | 4670 mm | 4890 mm |
| Wheelbase Size | 2830 mm | 2860 mm |
