2007 BMW X5 vs. 1991 Rover 400
To start off, 2007 BMW X5 is newer by 16 year(s). Which means there will be less support and parts availability for 1991 Rover 400. In addition, the cost of maintenance, including insurance, on 1991 Rover 400 would be higher. At 2,979 cc (6 cylinders), 2007 BMW X5 is equipped with a bigger engine. In terms of performance, 2007 BMW X5 (228 HP @ 5900 RPM) has 134 more horse power than 1991 Rover 400. (94 HP @ 6250 RPM). In normal driving conditions, 2007 BMW X5 should accelerate faster than 1991 Rover 400. With that said, vehicle weight also plays an important factor in acceleration. 2007 BMW X5 weights approximately 1060 kg more than 1991 Rover 400. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2007 BMW X5 is four wheel drive (4WD), it will have significant more traction and grip than 1991 Rover 400. In wet, icy, snow, or gravel driving conditions, 2007 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, 2007 BMW X5 (301 Nm @ 3500 RPM) has 177 more torque (in Nm) than 1991 Rover 400. (124 Nm @ 4000 RPM). This means 2007 BMW X5 will have an easier job in driving up hills or pulling heavy equipment than 1991 Rover 400.
Compare all specifications:
| 2007 BMW X5 | 1991 Rover 400 | |
| Make | BMW | Rover |
| Model | X5 | 400 |
| Year Released | 2007 | 1991 |
| Engine Position | Front | Front |
| Engine Size | 2979 cc | 1395 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 228 HP | 94 HP |
| Engine RPM | 5900 RPM | 6250 RPM |
| Torque | 301 Nm | 124 Nm |
| Torque RPM | 3500 RPM | 4000 RPM |
| Engine Bore Size | 84 mm | 75 mm |
| Engine Stroke Size | 89.6 mm | 79 mm |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | 4WD | Front |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 5 seats |
| Vehicle Weight | 2080 kg | 1020 kg |
| Vehicle Length | 4670 mm | 4370 mm |
| Vehicle Width | 1710 mm | 1690 mm |
| Vehicle Height | 1880 mm | 1410 mm |
| Wheelbase Size | 2830 mm | 2560 mm |
