1967 AC 428 vs. 1991 Porsche 911
To start off, 1991 Porsche 911 is newer by 24 year(s). Which means there will be less support and parts availability for 1967 AC 428. In addition, the cost of maintenance, including insurance, on 1967 AC 428 would be higher. At 7,010 cc (8 cylinders), 1967 AC 428 is equipped with a bigger engine. In terms of performance, 1967 AC 428 (345 HP @ 4600 RPM) has 117 more horse power than 1991 Porsche 911. (228 HP @ 5900 RPM). In normal driving conditions, 1967 AC 428 should accelerate faster than 1991 Porsche 911. With that said, vehicle weight also plays an important factor in acceleration. 1967 AC 428 weights approximately 308 kg more than 1991 Porsche 911. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Let's talk about torque, 1967 AC 428 (626 Nm @ 2800 RPM) has 340 more torque (in Nm) than 1991 Porsche 911. (286 Nm @ 4800 RPM). This means 1967 AC 428 will have an easier job in driving up hills or pulling heavy equipment than 1991 Porsche 911.
Compare all specifications:
| 1967 AC 428 | 1991 Porsche 911 | |
| Make | AC | Porsche |
| Model | 428 | 911 |
| Year Released | 1967 | 1991 |
| Body Type | Coupe | Roadster |
| Engine Position | Front | Rear |
| Engine Size | 7010 cc | 3163 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | boxer |
| Horse Power | 345 HP | 228 HP |
| Engine RPM | 4600 RPM | 5900 RPM |
| Torque | 626 Nm | 286 Nm |
| Torque RPM | 2800 RPM | 4800 RPM |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1483 kg | 1175 kg |
| Vehicle Length | 4520 mm | 4300 mm |
| Vehicle Width | 1710 mm | 1660 mm |
| Vehicle Height | 1260 mm | 1260 mm |
