1999 Opel Omega vs. 2004 BMW 645
To start off, 2004 BMW 645 is newer by 5 year(s). Which means there will be less support and parts availability for 1999 Opel Omega. In addition, the cost of maintenance, including insurance, on 1999 Opel Omega would be higher. At 4,398 cc (8 cylinders), 2004 BMW 645 is equipped with a bigger engine. In terms of performance, 2004 BMW 645 (328 HP @ 6100 RPM) has 205 more horse power than 1999 Opel Omega. (123 HP @ 4500 RPM) In normal driving conditions, 2004 BMW 645 should accelerate faster than 1999 Opel Omega. With that said, vehicle weight also plays an important factor in acceleration. 1999 Opel Omega weights approximately 45 kg more than 2004 BMW 645.
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, 2004 BMW 645 (450 Nm @ 3600 RPM) has 199 more torque (in Nm) than 1999 Opel Omega. (251 Nm @ 2200 RPM). This means 2004 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 1999 Opel Omega. 2004 BMW 645 has automatic transmission and 1999 Opel Omega has manual transmission. 1999 Opel Omega will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2004 BMW 645 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 1999 Opel Omega | 2004 BMW 645 | |
| Make | Opel | BMW |
| Model | Omega | 645 |
| Year Released | 1999 | 2004 |
| Engine Position | Front | Front |
| Engine Size | 2498 cc | 4398 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Horse Power | 123 HP | 328 HP |
| Engine RPM | 4500 RPM | 6100 RPM |
| Torque | 251 Nm | 450 Nm |
| Torque RPM | 2200 RPM | 3600 RPM |
| Engine Bore Size | 80 mm | 92 mm |
| Engine Stroke Size | 82.8 mm | 82.7 mm |
| Fuel Type | Diesel | Gasoline - Premium |
| Top Speed | 195 km/hour | 250 km/hour |
| Acceleration 0-100mph | 13 seconds | 5.6 seconds |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Automatic |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 5 doors | 2 doors |
| Vehicle Weight | 1735 kg | 1690 kg |
| Vehicle Length | 4900 mm | 4830 mm |
| Vehicle Width | 1780 mm | 1860 mm |
| Vehicle Height | 1550 mm | 1380 mm |
| Wheelbase Size | 2640 mm | 2830 mm |
| Fuel Tank Capacity | 75 L | 70 L |
