1971 AC 428 vs. 1956 Bristol 405
To start off, 1971 AC 428 is newer by 15 year(s). Which means there will be less support and parts availability for 1956 Bristol 405. In addition, the cost of maintenance, including insurance, on 1956 Bristol 405 would be higher. At 7,003 cc (8 cylinders), 1971 AC 428 is equipped with a bigger engine. In terms of performance, 1971 AC 428 (298 HP @ 4600 RPM) has 197 more horse power than 1956 Bristol 405. (101 HP @ 5000 RPM). In normal driving conditions, 1971 AC 428 should accelerate faster than 1956 Bristol 405. With that said, vehicle weight also plays an important factor in acceleration. 1971 AC 428 weights approximately 190 kg more than 1956 Bristol 405. 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, 1971 AC 428 (639 Nm @ 2800 RPM) has 487 more torque (in Nm) than 1956 Bristol 405. (152 Nm @ 3750 RPM). This means 1971 AC 428 will have an easier job in driving up hills or pulling heavy equipment than 1956 Bristol 405.
Compare all specifications:
| 1971 AC 428 | 1956 Bristol 405 | |
| Make | AC | Bristol |
| Model | 428 | 405 |
| Year Released | 1971 | 1956 |
| Engine Position | Front | Front |
| Engine Size | 7003 cc | 1971 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 298 HP | 101 HP |
| Engine RPM | 4600 RPM | 5000 RPM |
| Torque | 639 Nm | 152 Nm |
| Torque RPM | 2800 RPM | 3750 RPM |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1430 kg | 1240 kg |
| Vehicle Length | 4430 mm | 4820 mm |
| Vehicle Width | 1710 mm | 1730 mm |
| Vehicle Height | 1310 mm | 1470 mm |
| Wheelbase Size | 2450 mm | 2900 mm |
