1971 AC 428 vs. 2006 Audi S4
To start off, 2006 Audi S4 is newer by 35 year(s). Which means there will be less support and parts availability for 1971 AC 428. In addition, the cost of maintenance, including insurance, on 1971 AC 428 would be higher. At 7,003 cc (8 cylinders), 1971 AC 428 is equipped with a bigger engine. In terms of performance, 2006 Audi S4 (339 HP @ 7000 RPM) has 41 more horse power than 1971 AC 428. (298 HP @ 4600 RPM) In normal driving conditions, 2006 Audi S4 should accelerate faster than 1971 AC 428. With that said, vehicle weight also plays an important factor in acceleration. 1971 AC 428 weights approximately 155 kg more than 2006 Audi S4.
Because 2006 Audi S4 is four wheel drive (4WD), it will have significant more traction and grip than 1971 AC 428. In wet, icy, snow, or gravel driving conditions, 2006 Audi S4 will offer significantly more control. 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 228 more torque (in Nm) than 2006 Audi S4. (411 Nm @ 3500 RPM). This means 1971 AC 428 will have an easier job in driving up hills or pulling heavy equipment than 2006 Audi S4.
Compare all specifications:
| 1971 AC 428 | 2006 Audi S4 | |
| Make | AC | Audi |
| Model | 428 | S4 |
| Year Released | 1971 | 2006 |
| Engine Position | Front | Front |
| Engine Size | 7003 cc | 4163 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Horse Power | 298 HP | 339 HP |
| Engine RPM | 4600 RPM | 7000 RPM |
| Torque | 639 Nm | 411 Nm |
| Torque RPM | 2800 RPM | 3500 RPM |
| Fuel Type | Gasoline | Gasoline - Premium |
| Drive Type | Rear | 4WD |
| Transmission Type | Manual | Manual |
| Number of Seats | 2 seats | 4 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1430 kg | 1275 kg |
| Vehicle Length | 4430 mm | 4580 mm |
| Vehicle Width | 1710 mm | 1790 mm |
| Vehicle Height | 1310 mm | 1450 mm |
| Wheelbase Size | 2450 mm | 2660 mm |
