1991 Opel Calibra vs. 1959 Rover P4
To start off, 1991 Opel Calibra is newer by 32 year(s). Which means there will be less support and parts availability for 1959 Rover P4. In addition, the cost of maintenance, including insurance, on 1959 Rover P4 would be higher. At 2,286 cc (4 cylinders), 1959 Rover P4 is equipped with a bigger engine. In terms of performance, 1991 Opel Calibra (115 HP @ 5200 RPM) has 48 more horse power than 1959 Rover P4. (67 HP @ 4250 RPM). In normal driving conditions, 1991 Opel Calibra should accelerate faster than 1959 Rover P4. With that said, vehicle weight also plays an important factor in acceleration. 1959 Rover P4 weights approximately 282 kg more than 1991 Opel Calibra.
Because 1991 Opel Calibra is four wheel drive (4WD), it will have significant more traction and grip than 1959 Rover P4. In wet, icy, snow, or gravel driving conditions, 1991 Opel Calibra 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, 1991 Opel Calibra (174 Nm @ 2600 RPM) has 5 more torque (in Nm) than 1959 Rover P4. (169 Nm @ 2500 RPM). This means 1991 Opel Calibra will have an easier job in driving up hills or pulling heavy equipment than 1959 Rover P4.
Compare all specifications:
| 1991 Opel Calibra | 1959 Rover P4 | |
| Make | Opel | Rover |
| Model | Calibra | P4 |
| Year Released | 1991 | 1959 |
| Engine Position | Front | Front |
| Engine Size | 1998 cc | 2286 cc |
| Engine Cylinders | 4 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 115 HP | 67 HP |
| Engine RPM | 5200 RPM | 4250 RPM |
| Torque | 174 Nm | 169 Nm |
| Torque RPM | 2600 RPM | 2500 RPM |
| Engine Bore Size | 86 mm | 90.5 mm |
| Engine Stroke Size | 86 mm | 88.9 mm |
| Drive Type | 4WD | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1190 kg | 1472 kg |
| Vehicle Length | 4500 mm | 4450 mm |
| Vehicle Width | 1680 mm | 1670 mm |
| Vehicle Height | 1330 mm | 1630 mm |
| Wheelbase Size | 2610 mm | 2830 mm |
| Fuel Tank Capacity | 75 L | 52 L |
