1970 AC 428 vs. 1981 Audi UR
To start off, 1981 Audi UR is newer by 11 year(s). Which means there will be less support and parts availability for 1970 AC 428. In addition, the cost of maintenance, including insurance, on 1970 AC 428 would be higher. At 7,003 cc (8 cylinders), 1970 AC 428 is equipped with a bigger engine. In terms of performance, 1970 AC 428 (298 HP @ 4600 RPM) has 101 more horse power than 1981 Audi UR. (197 HP @ 5500 RPM). In normal driving conditions, 1970 AC 428 should accelerate faster than 1981 Audi UR. With that said, vehicle weight also plays an important factor in acceleration. 1970 AC 428 weights approximately 180 kg more than 1981 Audi UR. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 1981 Audi UR is four wheel drive (4WD), it will have significant more traction and grip than 1970 AC 428. In wet, icy, snow, or gravel driving conditions, 1981 Audi UR 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, 1970 AC 428 (640 Nm @ 2800 RPM) has 355 more torque (in Nm) than 1981 Audi UR. (285 Nm @ 3500 RPM). This means 1970 AC 428 will have an easier job in driving up hills or pulling heavy equipment than 1981 Audi UR.
Compare all specifications:
| 1970 AC 428 | 1981 Audi UR | |
| Make | AC | Audi |
| Model | 428 | UR |
| Year Released | 1970 | 1981 |
| Engine Position | Front | Front |
| Engine Size | 7003 cc | 2144 cc |
| Engine Cylinders | 8 cylinders | 5 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 298 HP | 197 HP |
| Engine RPM | 4600 RPM | 5500 RPM |
| Torque | 640 Nm | 285 Nm |
| Torque RPM | 2800 RPM | 3500 RPM |
| Fuel Type | Gasoline | Gasoline |
| 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 | 1250 kg |
| Vehicle Length | 4430 mm | 4430 mm |
| Vehicle Width | 1710 mm | 1690 mm |
| Vehicle Height | 1310 mm | 1360 mm |
| Wheelbase Size | 2450 mm | 2530 mm |
