1965 AC 427 vs. 1957 Riley 1.5
To start off, 1965 AC 427 is newer by 8 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 6,997 cc (8 cylinders), 1965 AC 427 is equipped with a bigger engine. In terms of performance, 1965 AC 427 (410 HP @ 4000 RPM) has 347 more horse power than 1957 Riley 1.5. (63 HP @ 5000 RPM). In normal driving conditions, 1965 AC 427 should accelerate faster than 1957 Riley 1.5. With that said, vehicle weight also plays an important factor in acceleration. 1965 AC 427 weights approximately 462 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, 1965 AC 427 (652 Nm @ 3700 RPM) has 540 more torque (in Nm) than 1957 Riley 1.5. (112 Nm @ 2500 RPM). This means 1965 AC 427 will have an easier job in driving up hills or pulling heavy equipment than 1957 Riley 1.5. 1965 AC 427 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. 1965 AC 427 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 1965 AC 427 | 1957 Riley 1.5 | |
| Make | AC | Riley |
| Model | 427 | 1.5 |
| Year Released | 1965 | 1957 |
| Engine Position | Front | Front |
| Engine Size | 6997 cc | 1489 cc |
| Engine Cylinders | 8 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Horse Power | 410 HP | 63 HP |
| Engine RPM | 4000 RPM | 5000 RPM |
| Torque | 652 Nm | 112 Nm |
| Torque RPM | 3700 RPM | 2500 RPM |
| Engine Bore Size | 107.7 mm | 73 mm |
| Engine Stroke Size | 96 mm | 88.9 mm |
| Drive Type | Rear | Rear |
| Transmission Type | Automatic | Manual |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1397 kg | 935 kg |
| Vehicle Length | 4430 mm | 3890 mm |
| Vehicle Width | 1710 mm | 1560 mm |
| Vehicle Height | 1300 mm | 1510 mm |
| Wheelbase Size | 2440 mm | 2190 mm |
| Fuel Tank Capacity | 81 L | 31 L |
