1991 Audi 100 vs. 1968 Riley 4
To start off, 1991 Audi 100 is newer by 23 year(s). Which means there will be less support and parts availability for 1968 Riley 4. In addition, the cost of maintenance, including insurance, on 1968 Riley 4 would be higher. At 2,771 cc (6 cylinders), 1991 Audi 100 is equipped with a bigger engine. In terms of performance, 1991 Audi 100 (171 HP) has 104 more horse power than 1968 Riley 4. (67 HP). In normal driving conditions, 1991 Audi 100 should accelerate faster than 1968 Riley 4. With that said, vehicle weight also plays an important factor in acceleration. 1991 Audi 100 weights approximately 352 kg more than 1968 Riley 4. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 1991 Audi 100 is four wheel drive (4WD), it will have significant more traction and grip than 1968 Riley 4. In wet, icy, snow, or gravel driving conditions, 1991 Audi 100 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 Audi 100 (251 Nm @ 3000 RPM) has 130 more torque (in Nm) than 1968 Riley 4. (121 Nm @ 2500 RPM). This means 1991 Audi 100 will have an easier job in driving up hills or pulling heavy equipment than 1968 Riley 4.
Compare all specifications:
| 1991 Audi 100 | 1968 Riley 4 | |
| Make | Audi | Riley |
| Model | 100 | 4 |
| Year Released | 1991 | 1968 |
| Engine Position | Front | Front |
| Engine Size | 2771 cc | 1622 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 2 valves | 2 valves |
| Horse Power | 171 HP | 67 HP |
| Torque | 251 Nm | 121 Nm |
| Torque RPM | 3000 RPM | 2500 RPM |
| Engine Bore Size | 82.5 mm | 76.2 mm |
| Engine Stroke Size | 86.4 mm | 88.9 mm |
| Drive Type | 4WD | Rear |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1500 kg | 1148 kg |
| Vehicle Length | 4800 mm | 4540 mm |
| Vehicle Width | 1780 mm | 1620 mm |
| Vehicle Height | 1450 mm | 1530 mm |
| Wheelbase Size | 2690 mm | 2530 mm |
| Fuel Tank Capacity | 80 L | 45 L |
