1991 Rover 400 vs. 2011 BMW 550
To start off, 2011 BMW 550 is newer by 20 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 4,400 cc (8 cylinders), 2011 BMW 550 is equipped with a bigger engine. In terms of performance, 2011 BMW 550 (400 HP @ 5500 RPM) has 306 more horse power than 1991 Rover 400. (94 HP @ 6250 RPM) In normal driving conditions, 2011 BMW 550 should accelerate faster than 1991 Rover 400. With that said, vehicle weight also plays an important factor in acceleration. 2011 BMW 550 weights approximately 1275 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 2011 BMW 550 is all wheel drive (AWD), it will have significant more traction and grip than 1991 Rover 400. In wet, icy, snow, or gravel driving conditions, 2011 BMW 550 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, 2011 BMW 550 (609 Nm @ 1750 RPM) has 485 more torque (in Nm) than 1991 Rover 400. (124 Nm @ 4000 RPM). This means 2011 BMW 550 will have an easier job in driving up hills or pulling heavy equipment than 1991 Rover 400. 2011 BMW 550 has automatic transmission and 1991 Rover 400 has manual transmission. 1991 Rover 400 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2011 BMW 550 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 1991 Rover 400 | 2011 BMW 550 | |
| Make | Rover | BMW |
| Model | 400 | 550 |
| Year Released | 1991 | 2011 |
| Engine Position | Front | Front |
| Engine Size | 1395 cc | 4400 cc |
| Engine Cylinders | 4 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 94 HP | 400 HP |
| Engine RPM | 6250 RPM | 5500 RPM |
| Torque | 124 Nm | 609 Nm |
| Torque RPM | 4000 RPM | 1750 RPM |
| Fuel Type | Gasoline | Gasoline - Premium |
| Drive Type | Front | AWD |
| Transmission Type | Manual | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Vehicle Weight | 1020 kg | 2295 kg |
| Vehicle Length | 4370 mm | 4999 mm |
| Vehicle Width | 1690 mm | 1900 mm |
| Vehicle Height | 1410 mm | 1560 mm |
| Wheelbase Size | 2560 mm | 3071 mm |
