1971 AC 428 vs. 2009 Porsche 911
To start off, 2009 Porsche 911 is newer by 38 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, 2009 Porsche 911 (351 HP @ 6600 RPM) has 53 more horse power than 1971 AC 428. (298 HP @ 4600 RPM) In normal driving conditions, 2009 Porsche 911 should accelerate faster than 1971 AC 428. With that said, vehicle weight also plays an important factor in acceleration. 1971 AC 428 weights approximately 5 kg more than 2009 Porsche 911.
Because 2009 Porsche 911 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, 2009 Porsche 911 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 239 more torque (in Nm) than 2009 Porsche 911. (400 Nm @ 4600 RPM). This means 1971 AC 428 will have an easier job in driving up hills or pulling heavy equipment than 2009 Porsche 911.
Compare all specifications:
| 1971 AC 428 | 2009 Porsche 911 | |
| Make | AC | Porsche |
| Model | 428 | 911 |
| Year Released | 1971 | 2009 |
| Engine Position | Front | Rear |
| Engine Size | 7003 cc | 3824 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | in-line | boxer |
| Horse Power | 298 HP | 351 HP |
| Engine RPM | 4600 RPM | 6600 RPM |
| Torque | 639 Nm | 400 Nm |
| Torque RPM | 2800 RPM | 4600 RPM |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Rear | 4WD |
| Transmission Type | Manual | Manual |
| Number of Seats | 2 seats | 2 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1430 kg | 1425 kg |
| Vehicle Length | 4430 mm | 4430 mm |
| Vehicle Width | 1710 mm | 1310 mm |
| Vehicle Height | 1310 mm | 1860 mm |
| Wheelbase Size | 2450 mm | 2360 mm |
