1975 AC 428 vs. 1980 BMW M5
To start off, 1980 BMW M5 is newer by 5 year(s). Which means there will be less support and parts availability for 1975 AC 428. In addition, the cost of maintenance, including insurance, on 1975 AC 428 would be higher. At 7,003 cc (8 cylinders), 1975 AC 428 is equipped with a bigger engine. In terms of performance, 1975 AC 428 (298 HP @ 4600 RPM) has 80 more horse power than 1980 BMW M5. (218 HP @ 5200 RPM). In normal driving conditions, 1975 AC 428 should accelerate faster than 1980 BMW M5. With that said, vehicle weight also plays an important factor in acceleration. 1975 AC 428 weights approximately 39 kg more than 1980 BMW M5. 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, 1975 AC 428 (639 Nm @ 2800 RPM) has 335 more torque (in Nm) than 1980 BMW M5. (304 Nm @ 4000 RPM). This means 1975 AC 428 will have an easier job in driving up hills or pulling heavy equipment than 1980 BMW M5.
Compare all specifications:
| 1975 AC 428 | 1980 BMW M5 | |
| Make | AC | BMW |
| Model | 428 | M5 |
| Year Released | 1975 | 1980 |
| Engine Position | Front | Front |
| Engine Size | 7003 cc | 3453 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 298 HP | 218 HP |
| Engine RPM | 4600 RPM | 5200 RPM |
| Torque | 639 Nm | 304 Nm |
| Torque RPM | 2800 RPM | 4000 RPM |
| 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 | 1391 kg |
| Vehicle Length | 4430 mm | 4620 mm |
| Vehicle Width | 1710 mm | 1700 mm |
| Vehicle Height | 1310 mm | 1430 mm |
| Wheelbase Size | 2450 mm | 2640 mm |
