1981 BMW 525 vs. 1999 Opel Omega
To start off, 1999 Opel Omega is newer by 18 year(s). Which means there will be less support and parts availability for 1981 BMW 525. In addition, the cost of maintenance, including insurance, on 1981 BMW 525 would be higher. At 5,663 cc (8 cylinders), 1999 Opel Omega is equipped with a bigger engine. In terms of performance, 1999 Opel Omega (311 HP @ 5600 RPM) has 163 more horse power than 1981 BMW 525. (148 HP @ 5500 RPM) In normal driving conditions, 1999 Opel Omega should accelerate faster than 1981 BMW 525. With that said, vehicle weight also plays an important factor in acceleration. 1999 Opel Omega weights approximately 370 kg more than 1981 BMW 525. 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, 1999 Opel Omega (459 Nm @ 4400 RPM) has 244 more torque (in Nm) than 1981 BMW 525. (215 Nm @ 4000 RPM). This means 1999 Opel Omega will have an easier job in driving up hills or pulling heavy equipment than 1981 BMW 525. 1999 Opel Omega has automatic transmission and 1981 BMW 525 has manual transmission. 1981 BMW 525 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 1999 Opel Omega will be easier to drive especially in heavy traffic.
Compare all specifications:
| 1981 BMW 525 | 1999 Opel Omega | |
| Make | BMW | Opel |
| Model | 525 | Omega |
| Year Released | 1981 | 1999 |
| Engine Position | Front | Front |
| Engine Size | 2495 cc | 5663 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 2 valves | 2 valves |
| Horse Power | 148 HP | 311 HP |
| Engine RPM | 5500 RPM | 5600 RPM |
| Torque | 215 Nm | 459 Nm |
| Torque RPM | 4000 RPM | 4400 RPM |
| Engine Bore Size | 86.1 mm | 99 mm |
| Engine Stroke Size | 71.6 mm | 92 mm |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Automatic |
| Vehicle Weight | 1280 kg | 1650 kg |
| Vehicle Length | 4780 mm | 4900 mm |
| Vehicle Width | 1810 mm | 1790 mm |
| Vehicle Height | 1440 mm | 1460 mm |
| Wheelbase Size | 2630 mm | 2740 mm |
