1975 AC 428 vs. 1991 Rolls-Royce Silver Spur
To start off, 1991 Rolls-Royce Silver Spur is newer by 16 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, 1991 Rolls-Royce Silver Spur (301 HP @ 4000 RPM) has 3 more horse power than 1975 AC 428. (298 HP @ 4600 RPM) In normal driving conditions, 1991 Rolls-Royce Silver Spur should accelerate faster than 1975 AC 428. With that said, vehicle weight also plays an important factor in acceleration. 1991 Rolls-Royce Silver Spur weights approximately 1040 kg more than 1975 AC 428. 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 39 more torque (in Nm) than 1991 Rolls-Royce Silver Spur. (600 Nm @ 2000 RPM). This means 1975 AC 428 will have an easier job in driving up hills or pulling heavy equipment than 1991 Rolls-Royce Silver Spur.
Compare all specifications:
| 1975 AC 428 | 1991 Rolls-Royce Silver Spur | |
| Make | AC | Rolls-Royce |
| Model | 428 | Silver Spur |
| Year Released | 1975 | 1991 |
| Engine Position | Front | Front |
| Engine Size | 7003 cc | 6750 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Horse Power | 298 HP | 301 HP |
| Engine RPM | 4600 RPM | 4000 RPM |
| Torque | 639 Nm | 600 Nm |
| Torque RPM | 2800 RPM | 2000 RPM |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Rear | Rear |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1430 kg | 2470 kg |
| Vehicle Length | 4430 mm | 5400 mm |
| Vehicle Width | 1710 mm | 1890 mm |
| Vehicle Height | 1310 mm | 1490 mm |
| Wheelbase Size | 2450 mm | 3170 mm |
