2009 Cadillac STS vs. 1991 Opel Omega
To start off, 2009 Cadillac STS is newer by 18 year(s). Which means there will be less support and parts availability for 1991 Opel Omega. In addition, the cost of maintenance, including insurance, on 1991 Opel Omega would be higher. At 4,564 cc (8 cylinders), 2009 Cadillac STS is equipped with a bigger engine. In terms of performance, 2009 Cadillac STS (320 HP @ 6400 RPM) has 210 more horse power than 1991 Opel Omega. (110 HP @ 5200 RPM). In normal driving conditions, 2009 Cadillac STS should accelerate faster than 1991 Opel Omega. With that said, vehicle weight also plays an important factor in acceleration. 2009 Cadillac STS weights approximately 305 kg more than 1991 Opel Omega. 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, 2009 Cadillac STS (427 Nm @ 4400 RPM) has 265 more torque (in Nm) than 1991 Opel Omega. (162 Nm @ 4600 RPM). This means 2009 Cadillac STS will have an easier job in driving up hills or pulling heavy equipment than 1991 Opel Omega. 2009 Cadillac STS has automatic transmission and 1991 Opel Omega has manual transmission. 1991 Opel Omega will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2009 Cadillac STS will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2009 Cadillac STS | 1991 Opel Omega | |
| Make | Cadillac | Opel |
| Model | STS | Omega |
| Year Released | 2009 | 1991 |
| Engine Position | Front | Front |
| Engine Size | 4564 cc | 1998 cc |
| Engine Cylinders | 8 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Horse Power | 320 HP | 110 HP |
| Engine RPM | 6400 RPM | 5200 RPM |
| Torque | 427 Nm | 162 Nm |
| Torque RPM | 4400 RPM | 4600 RPM |
| Engine Compression Ratio | 3.7:1 | 9.4:1 |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Rear | Rear |
| Transmission Type | Automatic | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Weight | 1635 kg | 1330 kg |
| Vehicle Length | 5000 mm | 4740 mm |
| Vehicle Width | 1850 mm | 1780 mm |
| Vehicle Height | 1470 mm | 1490 mm |
| Wheelbase Size | 2960 mm | 2740 mm |
| Fuel Tank Capacity | 64 L | 70 L |
