1991 Buick Roadmaster vs. 2012 BMW 650
To start off, 2012 BMW 650 is newer by 21 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, 2012 BMW 650 (400 HP @ 5500 RPM) has 223 more horse power than 1991 Buick Roadmaster. (177 HP @ 4200 RPM) In normal driving conditions, 2012 BMW 650 should accelerate faster than 1991 Buick Roadmaster. With that said, vehicle weight also plays an important factor in acceleration. 2012 BMW 650 weights approximately 250 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 2012 BMW 650 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, 2012 BMW 650 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, 2012 BMW 650 (609 Nm @ 1750 RPM) has 216 more torque (in Nm) than 1991 Buick Roadmaster. (393 Nm @ 2400 RPM). This means 2012 BMW 650 will have an easier job in driving up hills or pulling heavy equipment than 1991 Buick Roadmaster.
Compare all specifications:
| 1991 Buick Roadmaster | 2012 BMW 650 | |
| Make | Buick | BMW |
| Model | Roadmaster | 650 |
| Year Released | 1991 | 2012 |
| Body Type | Sedan | Coupe |
| Engine Position | Front | Front |
| Engine Size | 5731 cc | 4400 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Horse Power | 177 HP | 400 HP |
| Engine RPM | 4200 RPM | 5500 RPM |
| Torque | 393 Nm | 609 Nm |
| Torque RPM | 2400 RPM | 1750 RPM |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Rear | AWD |
| Transmission Type | Automatic | 8-speed shiftable automatic |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1840 kg | 2090 kg |
| Vehicle Length | 5280 mm | 4894 mm |
| Vehicle Width | 2040 mm | 1894 mm |
| Vehicle Height | 1650 mm | 1369 mm |
| Wheelbase Size | 2950 mm | 2855 mm |
| Fuel Tank Capacity | 75 L | 70 L |
