1999 Buick Riviera vs. 2003 Opel Signum
To start off, 2003 Opel Signum is newer by 4 year(s). Which means there will be less support and parts availability for 1999 Buick Riviera. In addition, the cost of maintenance, including insurance, on 1999 Buick Riviera would be higher. At 3,791 cc (6 cylinders), 1999 Buick Riviera is equipped with a bigger engine. In terms of performance, 1999 Buick Riviera (205 HP @ 5200 RPM) has 61 more horse power than 2003 Opel Signum. (144 HP @ 6000 RPM). In normal driving conditions, 1999 Buick Riviera should accelerate faster than 2003 Opel Signum. With that said, vehicle weight also plays an important factor in acceleration. 1999 Buick Riviera weights approximately 14 kg more than 2003 Opel Signum. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Both vehicles are front wheel drive (FWD). Which offers better traction when its slippery than rear 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 Buick Riviera (312 Nm @ 4000 RPM) has 72 more torque (in Nm) than 2003 Opel Signum. (240 Nm @ 3800 RPM). This means 1999 Buick Riviera will have an easier job in driving up hills or pulling heavy equipment than 2003 Opel Signum.
Compare all specifications:
| 1999 Buick Riviera | 2003 Opel Signum | |
| Make | Buick | Opel |
| Model | Riviera | Signum |
| Year Released | 1999 | 2003 |
| Body Type | Coupe | Hatchback |
| Engine Position | Front | Front |
| Engine Size | 3791 cc | 2198 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 205 HP | 144 HP |
| Engine RPM | 5200 RPM | 6000 RPM |
| Torque | 312 Nm | 240 Nm |
| Torque RPM | 4000 RPM | 3800 RPM |
| Engine Bore Size | 96.5 mm | 86 mm |
| Engine Stroke Size | 86.4 mm | 94.6 mm |
| Engine Compression Ratio | 9.4:1 | 12.0:1 |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Front | Front |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Weight | 1700 kg | 1686 kg |
| Vehicle Length | 5270 mm | 4640 mm |
| Vehicle Width | 1910 mm | 1800 mm |
| Vehicle Height | 1400 mm | 1470 mm |
