1971 AC 428 vs. 2004 Opel Signum
To start off, 2004 Opel Signum is newer by 33 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, 1971 AC 428 (298 HP @ 4600 RPM) has 199 more horse power than 2004 Opel Signum. (99 HP @ 3120 RPM). In normal driving conditions, 1971 AC 428 should accelerate faster than 2004 Opel Signum. With that said, vehicle weight also plays an important factor in acceleration. 2004 Opel Signum weights approximately 165 kg more than 1971 AC 428.
Because 1971 AC 428 is rear wheel drive (RWD), it offers better handling in dry conditions; in addition, if you are looking to drift, it will be much easier to do with 1971 AC 428. However, in wet, icy, snow, or gravel driving conditions, 2004 Opel Signum, being front wheel drive (FWD), will offer much better control with better grip. 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 409 more torque (in Nm) than 2004 Opel Signum. (230 Nm @ 1500 RPM). This means 1971 AC 428 will have an easier job in driving up hills or pulling heavy equipment than 2004 Opel Signum.
Compare all specifications:
| 1971 AC 428 | 2004 Opel Signum | |
| Make | AC | Opel |
| Model | 428 | Signum |
| Year Released | 1971 | 2004 |
| Engine Position | Front | Front |
| Engine Size | 7003 cc | 1910 cc |
| Engine Cylinders | 8 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 298 HP | 99 HP |
| Engine RPM | 4600 RPM | 3120 RPM |
| Torque | 639 Nm | 230 Nm |
| Torque RPM | 2800 RPM | 1500 RPM |
| Fuel Type | Gasoline | Diesel |
| Drive Type | Rear | Front |
| Transmission Type | Manual | Manual |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Weight | 1430 kg | 1595 kg |
| Vehicle Length | 4430 mm | 4640 mm |
| Vehicle Width | 1710 mm | 1800 mm |
| Vehicle Height | 1310 mm | 1470 mm |
| Wheelbase Size | 2450 mm | 2620 mm |
