2005 Audi A4 vs. 1971 Riley 4
To start off, 2005 Audi A4 is newer by 34 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 1,781 cc (4 cylinders), 2005 Audi A4 is equipped with a bigger engine. In terms of performance, 2005 Audi A4 (180 HP @ 5700 RPM) has 113 more horse power than 1971 Riley 4. (67 HP @ 5000 RPM). In normal driving conditions, 2005 Audi A4 should accelerate faster than 1971 Riley 4. With that said, vehicle weight also plays an important factor in acceleration. 2005 Audi A4 weights approximately 327 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.
Because 2005 Audi A4 is four wheel drive (4WD), it will have significant more traction and grip than 1971 Riley 4. In wet, icy, snow, or gravel driving conditions, 2005 Audi A4 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, 2005 Audi A4 (240 Nm @ 1950 RPM) has 119 more torque (in Nm) than 1971 Riley 4. (121 Nm @ 2500 RPM). This means 2005 Audi A4 will have an easier job in driving up hills or pulling heavy equipment than 1971 Riley 4.
Compare all specifications:
| 2005 Audi A4 | 1971 Riley 4 | |
| Make | Audi | Riley |
| Model | A4 | 4 |
| Year Released | 2005 | 1971 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 1781 cc | 1622 cc |
| Engine Cylinders | 4 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 180 HP | 67 HP |
| Engine RPM | 5700 RPM | 5000 RPM |
| Torque | 240 Nm | 121 Nm |
| Torque RPM | 1950 RPM | 2500 RPM |
| Engine Bore Size | 81 mm | 76.3 mm |
| Engine Stroke Size | 86.4 mm | 88.9 mm |
| Engine Compression Ratio | 9.3:1 | 8.3:1 |
| Fuel Type | Gasoline - Premium | Gasoline |
| Drive Type | 4WD | Rear |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1475 kg | 1148 kg |
| Vehicle Length | 4550 mm | 4540 mm |
| Vehicle Width | 1770 mm | 1620 mm |
| Vehicle Height | 1430 mm | 1510 mm |
| Wheelbase Size | 2660 mm | 2530 mm |
| Fuel Tank Capacity | 66 L | 45 L |
