1991 Audi 90 vs. 1971 Riley 4
To start off, 1991 Audi 90 is newer by 20 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 1,992 cc (5 cylinders), 1991 Audi 90 is equipped with a bigger engine. In terms of performance, 1991 Audi 90 (114 HP @ 5400 RPM) has 47 more horse power than 1971 Riley 4. (67 HP @ 5000 RPM). In normal driving conditions, 1991 Audi 90 should accelerate faster than 1971 Riley 4. With that said, vehicle weight also plays an important factor in acceleration. 1971 Riley 4 weights approximately 38 kg more than 1991 Audi 90.
Because 1971 Riley 4 is rear wheel drive (RWD), it offers better handling in dry conditions; in addition, if you are looking to drift, it will be much easier to do with 1971 Riley 4. However, in wet, icy, snow, or gravel driving conditions, 1991 Audi 90, being front wheel drive (FWD), will offer much better control with better grip. 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 Audi 90 (172 Nm @ 4000 RPM) has 51 more torque (in Nm) than 1971 Riley 4. (121 Nm @ 2500 RPM). This means 1991 Audi 90 will have an easier job in driving up hills or pulling heavy equipment than 1971 Riley 4.
Compare all specifications:
| 1991 Audi 90 | 1971 Riley 4 | |
| Make | Audi | Riley |
| Model | 90 | 4 |
| Year Released | 1991 | 1971 |
| Engine Position | Front | Front |
| Engine Size | 1992 cc | 1622 cc |
| Engine Cylinders | 5 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 114 HP | 67 HP |
| Engine RPM | 5400 RPM | 5000 RPM |
| Torque | 172 Nm | 121 Nm |
| Torque RPM | 4000 RPM | 2500 RPM |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Front | Rear |
| Number of Seats | 5 seats | 5 seats |
| Vehicle Weight | 1110 kg | 1148 kg |
| Vehicle Length | 4400 mm | 4540 mm |
| Vehicle Width | 1700 mm | 1620 mm |
| Vehicle Height | 1400 mm | 1510 mm |
| Wheelbase Size | 2550 mm | 2530 mm |
