1991 Buick Roadmaster vs. 1956 Rover P4
To start off, 1991 Buick Roadmaster is newer by 35 year(s). Which means there will be less support and parts availability for 1956 Rover P4. In addition, the cost of maintenance, including insurance, on 1956 Rover P4 would be higher. At 5,731 cc (8 cylinders), 1991 Buick Roadmaster is equipped with a bigger engine. In terms of performance, 1991 Buick Roadmaster (177 HP @ 4200 RPM) has 126 more horse power than 1956 Rover P4. (51 HP @ 4000 RPM). In normal driving conditions, 1991 Buick Roadmaster should accelerate faster than 1956 Rover P4. With that said, vehicle weight also plays an important factor in acceleration. 1991 Buick Roadmaster weights approximately 460 kg more than 1956 Rover P4. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Both vehicles are rear wheel drive (RWD) - it offers better handling in dry conditions; in addition, if you are looking to drift, both vehicles do the job better than front wheel drive vehicles. 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, 1991 Buick Roadmaster (393 Nm @ 2400 RPM) has 255 more torque (in Nm) than 1956 Rover P4. (138 Nm @ 2000 RPM). This means 1991 Buick Roadmaster will have an easier job in driving up hills or pulling heavy equipment than 1956 Rover P4. 1991 Buick Roadmaster has automatic transmission and 1956 Rover P4 has manual transmission. 1956 Rover P4 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 1991 Buick Roadmaster will be easier to drive especially in heavy traffic.
Compare all specifications:
| 1991 Buick Roadmaster | 1956 Rover P4 | |
| Make | Buick | Rover |
| Model | Roadmaster | P4 |
| Year Released | 1991 | 1956 |
| Engine Position | Front | Front |
| Engine Size | 5731 cc | 1997 cc |
| Engine Cylinders | 8 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Horse Power | 177 HP | 51 HP |
| Engine RPM | 4200 RPM | 4000 RPM |
| Torque | 393 Nm | 138 Nm |
| Torque RPM | 2400 RPM | 2000 RPM |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Rear | Rear |
| Transmission Type | Automatic | Manual |
| Number of Seats | 5 seats | 5 seats |
| Vehicle Weight | 1840 kg | 1380 kg |
| Vehicle Length | 5280 mm | 4550 mm |
| Vehicle Width | 2040 mm | 1680 mm |
| Vehicle Height | 1650 mm | 1620 mm |
| Wheelbase Size | 2950 mm | 2830 mm |
