1984 Opel Monza vs. 1971 Riley 4
To start off, 1984 Opel Monza is newer by 13 year(s). Which means there will be less support and parts availability for 1971 Riley 4. In addition, the cost of maintenance, including insurance, on 1971 Riley 4 would be higher. At 2,197 cc (4 cylinders), 1984 Opel Monza is equipped with a bigger engine. In terms of performance, 1984 Opel Monza (114 HP @ 4800 RPM) has 47 more horse power than 1971 Riley 4. (67 HP @ 5000 RPM). In normal driving conditions, 1984 Opel Monza should accelerate faster than 1971 Riley 4. With that said, vehicle weight also plays an important factor in acceleration. 1984 Opel Monza weights approximately 178 kg more than 1971 Riley 4. 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, 1984 Opel Monza (182 Nm @ 2800 RPM) has 61 more torque (in Nm) than 1971 Riley 4. (121 Nm @ 2500 RPM). This means 1984 Opel Monza will have an easier job in driving up hills or pulling heavy equipment than 1971 Riley 4.
Compare all specifications:
| 1984 Opel Monza | 1971 Riley 4 | |
| Make | Opel | Riley |
| Model | Monza | 4 |
| Year Released | 1984 | 1971 |
| Engine Position | Front | Front |
| Engine Size | 2197 cc | 1622 cc |
| Engine Cylinders | 4 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 114 HP | 67 HP |
| Engine RPM | 4800 RPM | 5000 RPM |
| Torque | 182 Nm | 121 Nm |
| Torque RPM | 2800 RPM | 2500 RPM |
| Engine Bore Size | 95 mm | 76.3 mm |
| Engine Stroke Size | 77.5 mm | 88.9 mm |
| Engine Compression Ratio | 9.4:1 | 8.3:1 |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Rear | Rear |
| Number of Seats | 5 seats | 5 seats |
| Vehicle Weight | 1326 kg | 1148 kg |
| Vehicle Length | 4700 mm | 4540 mm |
| Vehicle Width | 1740 mm | 1620 mm |
| Vehicle Height | 1390 mm | 1510 mm |
| Wheelbase Size | 2670 mm | 2530 mm |
