1978 Opel Kadett vs. 1991 Porsche 928
To start off, 1991 Porsche 928 is newer by 13 year(s). Which means there will be less support and parts availability for 1978 Opel Kadett. In addition, the cost of maintenance, including insurance, on 1978 Opel Kadett 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 247 more horse power than 1978 Opel Kadett. (59 HP @ 5400 RPM) In normal driving conditions, 1991 Porsche 928 should accelerate faster than 1978 Opel Kadett. With that said, vehicle weight also plays an important factor in acceleration. 1991 Porsche 928 weights approximately 710 kg more than 1978 Opel Kadett. 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 318 more torque (in Nm) than 1978 Opel Kadett. (90 Nm @ 2600 RPM). This means 1991 Porsche 928 will have an easier job in driving up hills or pulling heavy equipment than 1978 Opel Kadett.
Compare all specifications:
| 1978 Opel Kadett | 1991 Porsche 928 | |
| Make | Opel | Porsche |
| Model | Kadett | 928 |
| Year Released | 1978 | 1991 |
| Engine Position | Front | Front |
| Engine Size | 1196 cc | 4663 cc |
| Engine Cylinders | 4 cylinders | 8 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 59 HP | 306 HP |
| Engine RPM | 5400 RPM | 5900 RPM |
| Torque | 90 Nm | 408 Nm |
| Torque RPM | 2600 RPM | 4100 RPM |
| Engine Bore Size | 79 mm | 97 mm |
| Engine Stroke Size | 61 mm | 78.9 mm |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 4 seats | 4 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 820 kg | 1530 kg |
| Vehicle Length | 4130 mm | 4530 mm |
| Vehicle Width | 1590 mm | 2060 mm |
| Vehicle Height | 1380 mm | 1290 mm |
| Wheelbase Size | 2400 mm | 2510 mm |
| Fuel Tank Capacity | 43 L | 76 L |
