1991 Innocenti 990 vs. 1971 Riley 4
To start off, 1991 Innocenti 990 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 1,622 cc (4 cylinders), 1971 Riley 4 is equipped with a bigger engine. In terms of performance, 1971 Riley 4 (67 HP @ 5000 RPM) has 16 more horse power than 1991 Innocenti 990. (51 HP @ 5800 RPM) In normal driving conditions, 1971 Riley 4 should accelerate faster than 1991 Innocenti 990. With that said, vehicle weight also plays an important factor in acceleration. 1971 Riley 4 weights approximately 438 kg more than 1991 Innocenti 990. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
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 Innocenti 990, 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, 1971 Riley 4 (121 Nm @ 2500 RPM) has 46 more torque (in Nm) than 1991 Innocenti 990. (75 Nm @ 3200 RPM). This means 1971 Riley 4 will have an easier job in driving up hills or pulling heavy equipment than 1991 Innocenti 990.
Compare all specifications:
| 1991 Innocenti 990 | 1971 Riley 4 | |
| Make | Innocenti | Riley |
| Model | 990 | 4 |
| Year Released | 1991 | 1971 |
| Engine Position | Front | Front |
| Engine Size | 992 cc | 1622 cc |
| Engine Cylinders | 3 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 51 HP | 67 HP |
| Engine RPM | 5800 RPM | 5000 RPM |
| Torque | 75 Nm | 121 Nm |
| Torque RPM | 3200 RPM | 2500 RPM |
| Engine Bore Size | 76 mm | 76.3 mm |
| Engine Stroke Size | 73 mm | 88.9 mm |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Front | Rear |
| Number of Seats | 5 seats | 5 seats |
| Vehicle Weight | 710 kg | 1148 kg |
| Vehicle Length | 3170 mm | 4540 mm |
| Vehicle Width | 1530 mm | 1620 mm |
| Vehicle Height | 1390 mm | 1510 mm |
| Wheelbase Size | 2050 mm | 2530 mm |
