2006 BMW X5 vs. 1991 Rover 100
To start off, 2006 BMW X5 is newer by 15 year(s). Which means there will be less support and parts availability for 1991 Rover 100. In addition, the cost of maintenance, including insurance, on 1991 Rover 100 would be higher. At 4,398 cc (8 cylinders), 2006 BMW X5 is equipped with a bigger engine. In terms of performance, 2006 BMW X5 (316 HP @ 6100 RPM) has 214 more horse power than 1991 Rover 100. (102 HP @ 6000 RPM). In normal driving conditions, 2006 BMW X5 should accelerate faster than 1991 Rover 100. With that said, vehicle weight also plays an important factor in acceleration. 2006 BMW X5 weights approximately 1325 kg more than 1991 Rover 100. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Let's talk about torque, 2006 BMW X5 (440 Nm @ 3700 RPM) has 305 more torque (in Nm) than 1991 Rover 100. (135 Nm @ 5000 RPM). This means 2006 BMW X5 will have an easier job in driving up hills or pulling heavy equipment than 1991 Rover 100.
Compare all specifications:
| 2006 BMW X5 | 1991 Rover 100 | |
| Make | BMW | Rover |
| Model | X5 | 100 |
| Year Released | 2006 | 1991 |
| Engine Position | Front | Front |
| Engine Size | 4398 cc | 1396 cc |
| Engine Cylinders | 8 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 316 HP | 102 HP |
| Engine RPM | 6100 RPM | 6000 RPM |
| Torque | 440 Nm | 135 Nm |
| Torque RPM | 3700 RPM | 5000 RPM |
| Engine Bore Size | 92 mm | 75 mm |
| Engine Stroke Size | 82.7 mm | 79 mm |
| Fuel Type | Gasoline - Premium | Gasoline |
| Number of Seats | 5 seats | 5 seats |
| Vehicle Weight | 2195 kg | 870 kg |
| Vehicle Length | 4670 mm | 3530 mm |
| Vehicle Width | 1880 mm | 1570 mm |
| Vehicle Height | 1710 mm | 1380 mm |
