1975 AC 428 vs. 2008 Audi S4
To start off, 2008 Audi S4 is newer by 33 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, 2008 Audi S4 (339 HP @ 7000 RPM) has 41 more horse power than 1975 AC 428. (298 HP @ 4600 RPM) In normal driving conditions, 2008 Audi S4 should accelerate faster than 1975 AC 428. With that said, vehicle weight also plays an important factor in acceleration. 2008 Audi S4 weights approximately 365 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.
Because 2008 Audi S4 is four wheel drive (4WD), it will have significant more traction and grip than 1975 AC 428. In wet, icy, snow, or gravel driving conditions, 2008 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, 1975 AC 428 (639 Nm @ 2800 RPM) has 229 more torque (in Nm) than 2008 Audi S4. (410 Nm @ 3500 RPM). This means 1975 AC 428 will have an easier job in driving up hills or pulling heavy equipment than 2008 Audi S4. 2008 Audi S4 has automatic transmission and 1975 AC 428 has manual transmission. 1975 AC 428 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2008 Audi S4 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 1975 AC 428 | 2008 Audi S4 | |
| Make | AC | Audi |
| Model | 428 | S4 |
| Year Released | 1975 | 2008 |
| 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 | 410 Nm |
| Torque RPM | 2800 RPM | 3500 RPM |
| Fuel Type | Gasoline | Gasoline - Premium |
| Drive Type | Rear | 4WD |
| Transmission Type | Manual | Automatic |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Weight | 1430 kg | 1795 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 |
