1974 Porsche 911 vs. 1991 Porsche 928
To start off, 1991 Porsche 928 is newer by 17 year(s). Which means there will be less support and parts availability for 1974 Porsche 911. In addition, the cost of maintenance, including insurance, on 1974 Porsche 911 would be higher. At 4,663 cc (8 cylinders), 1991 Porsche 928 is equipped with a bigger engine. In terms of performance, 1991 Porsche 928 (306 HP @ 5900 RPM) has 141 more horse power than 1974 Porsche 911. (165 HP @ 5800 RPM) In normal driving conditions, 1991 Porsche 928 should accelerate faster than 1974 Porsche 911. With that said, vehicle weight also plays an important factor in acceleration. 1991 Porsche 928 weights approximately 410 kg more than 1974 Porsche 911. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Both vehicles are rear wheel drive (RWD) - it offers better handling in dry conditions; in addition, if you are looking to drift, both vehicles do the job better than front wheel drive vehicles. 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, 1991 Porsche 928 (408 Nm @ 4100 RPM) has 173 more torque (in Nm) than 1974 Porsche 911. (235 Nm @ 4000 RPM). This means 1991 Porsche 928 will have an easier job in driving up hills or pulling heavy equipment than 1974 Porsche 911.
Compare all specifications:
| 1974 Porsche 911 | 1991 Porsche 928 | |
| Make | Porsche | Porsche |
| Model | 911 | 928 |
| Year Released | 1974 | 1991 |
| Body Type | Coupe | Coupe |
| Engine Position | Rear | Front |
| Engine Size | 2687 cc | 4663 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | boxer | in-line |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 165 HP | 306 HP |
| Engine RPM | 5800 RPM | 5900 RPM |
| Torque | 235 Nm | 408 Nm |
| Torque RPM | 4000 RPM | 4100 RPM |
| Engine Bore Size | 90 mm | 97 mm |
| Engine Stroke Size | 70.4 mm | 78.9 mm |
| Engine Compression Ratio | 8.5:1 | 10.0:1 |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 4 seats | 4 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1120 kg | 1530 kg |
| Vehicle Length | 4300 mm | 4530 mm |
| Vehicle Width | 1620 mm | 2060 mm |
| Vehicle Height | 1330 mm | 1290 mm |
| Wheelbase Size | 2270 mm | 2510 mm |
| Fuel Tank Capacity | 79 L | 76 L |
