1991 Buick Roadmaster vs. 2011 BMW X5
To start off, 2011 BMW X5 is newer by 20 year(s). Which means there will be less support and parts availability for 1991 Buick Roadmaster. In addition, the cost of maintenance, including insurance, on 1991 Buick Roadmaster would be higher. At 5,731 cc (8 cylinders), 1991 Buick Roadmaster is equipped with a bigger engine. In terms of performance, 2011 BMW X5 (304 HP @ 440 RPM) has 127 more horse power than 1991 Buick Roadmaster. (177 HP @ 4200 RPM) In normal driving conditions, 2011 BMW X5 should accelerate faster than 1991 Buick Roadmaster. With that said, vehicle weight also plays an important factor in acceleration. 2011 BMW X5 weights approximately 345 kg more than 1991 Buick Roadmaster. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2011 BMW X5 is all wheel drive (AWD), it will have significant more traction and grip than 1991 Buick Roadmaster. In wet, icy, snow, or gravel driving conditions, 2011 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, 2011 BMW X5 (600 Nm @ 1500 RPM) has 207 more torque (in Nm) than 1991 Buick Roadmaster. (393 Nm @ 2400 RPM). This means 2011 BMW X5 will have an easier job in driving up hills or pulling heavy equipment than 1991 Buick Roadmaster.
Compare all specifications:
| 1991 Buick Roadmaster | 2011 BMW X5 | |
| Make | Buick | BMW |
| Model | Roadmaster | X5 |
| Year Released | 1991 | 2011 |
| Body Type | Sedan | SUV |
| Engine Position | Front | Front |
| Engine Size | 5731 cc | 2993 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | in-line |
| Horse Power | 177 HP | 304 HP |
| Engine RPM | 4200 RPM | 440 RPM |
| Torque | 393 Nm | 600 Nm |
| Torque RPM | 2400 RPM | 1500 RPM |
| Fuel Type | Gasoline | Diesel |
| Drive Type | Rear | AWD |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Weight | 1840 kg | 2185 kg |
| Vehicle Length | 5280 mm | 4857 mm |
| Vehicle Width | 2040 mm | 1933 mm |
| Vehicle Height | 1650 mm | 1776 mm |
| Wheelbase Size | 2950 mm | 2934 mm |
| Fuel Tank Capacity | 75 L | 85 L |
