1957 Riley 1.5 vs. 1973 AC 428
To start off, 1973 AC 428 is newer by 16 year(s). Which means there will be less support and parts availability for 1957 Riley 1.5. In addition, the cost of maintenance, including insurance, on 1957 Riley 1.5 would be higher. At 7,002 cc (8 cylinders), 1973 AC 428 is equipped with a bigger engine. In terms of performance, 1973 AC 428 (298 HP @ 4600 RPM) has 235 more horse power than 1957 Riley 1.5. (63 HP @ 5000 RPM) In normal driving conditions, 1973 AC 428 should accelerate faster than 1957 Riley 1.5. With that said, vehicle weight also plays an important factor in acceleration. 1973 AC 428 weights approximately 495 kg more than 1957 Riley 1.5. 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, 1973 AC 428 (639 Nm @ 2800 RPM) has 527 more torque (in Nm) than 1957 Riley 1.5. (112 Nm @ 2500 RPM). This means 1973 AC 428 will have an easier job in driving up hills or pulling heavy equipment than 1957 Riley 1.5. 1973 AC 428 has automatic transmission and 1957 Riley 1.5 has manual transmission. 1957 Riley 1.5 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 1973 AC 428 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 1957 Riley 1.5 | 1973 AC 428 | |
| Make | Riley | AC |
| Model | 1.5 | 428 |
| Year Released | 1957 | 1973 |
| Engine Position | Front | Front |
| Engine Size | 1489 cc | 7002 cc |
| Engine Cylinders | 4 cylinders | 8 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 63 HP | 298 HP |
| Engine RPM | 5000 RPM | 4600 RPM |
| Torque | 112 Nm | 639 Nm |
| Torque RPM | 2500 RPM | 2800 RPM |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Automatic |
| Number of Seats | 5 seats | 2 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 935 kg | 1430 kg |
| Vehicle Length | 3890 mm | 4430 mm |
| Vehicle Width | 1560 mm | 1710 mm |
| Vehicle Height | 1510 mm | 1310 mm |
| Wheelbase Size | 2190 mm | 2450 mm |
