2004 Opel Omega vs. 1991 Porsche 928
To start off, 2004 Opel Omega is newer by 13 year(s). Which means there will be less support and parts availability for 1991 Porsche 928. In addition, the cost of maintenance, including insurance, on 1991 Porsche 928 would be higher. At 5,397 cc (8 cylinders), 1991 Porsche 928 is equipped with a bigger engine. In terms of performance, 1991 Porsche 928 (345 HP @ 5700 RPM) has 203 more horse power than 2004 Opel Omega. (142 HP @ 5400 RPM) In normal driving conditions, 1991 Porsche 928 should accelerate faster than 2004 Opel Omega. With that said, vehicle weight also plays an important factor in acceleration. 2004 Opel Omega weights approximately 65 kg more than 1991 Porsche 928.
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 (500 Nm @ 4250 RPM) has 291 more torque (in Nm) than 2004 Opel Omega. (209 Nm @ 4000 RPM). This means 1991 Porsche 928 will have an easier job in driving up hills or pulling heavy equipment than 2004 Opel Omega.
Compare all specifications:
| 2004 Opel Omega | 1991 Porsche 928 | |
| Make | Opel | Porsche |
| Model | Omega | 928 |
| Year Released | 2004 | 1991 |
| Engine Position | Middle | Front |
| Engine Size | 2198 cc | 5397 cc |
| Engine Cylinders | 4 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Horse Power | 142 HP | 345 HP |
| Engine RPM | 5400 RPM | 5700 RPM |
| Torque | 209 Nm | 500 Nm |
| Torque RPM | 4000 RPM | 4250 RPM |
| Engine Bore Size | 86 mm | 100.1 mm |
| Engine Stroke Size | 94.6 mm | 85.9 mm |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1665 kg | 1600 kg |
| Vehicle Length | 4900 mm | 4450 mm |
| Vehicle Width | 1790 mm | 1860 mm |
| Vehicle Height | 1510 mm | 1290 mm |
| Wheelbase Size | 2740 mm | 2510 mm |
| Fuel Tank Capacity | 75 L | 86 L |
