1991 Ford Sierra vs. 2006 Opel Signum
To start off, 2006 Opel Signum is newer by 15 year(s). Which means there will be less support and parts availability for 1991 Ford Sierra. In addition, the cost of maintenance, including insurance, on 1991 Ford Sierra would be higher. At 2,198 cc (4 cylinders), 2006 Opel Signum is equipped with a bigger engine. In terms of performance, 2006 Opel Signum (153 HP @ 5600 RPM) has 78 more horse power than 1991 Ford Sierra. (75 HP @ 4500 RPM) In normal driving conditions, 2006 Opel Signum should accelerate faster than 1991 Ford Sierra. With that said, vehicle weight also plays an important factor in acceleration. 2006 Opel Signum weights approximately 390 kg more than 1991 Ford Sierra. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Let's talk about torque, 2006 Opel Signum (220 Nm @ 3800 RPM) has 68 more torque (in Nm) than 1991 Ford Sierra. (152 Nm @ 2200 RPM). This means 2006 Opel Signum will have an easier job in driving up hills or pulling heavy equipment than 1991 Ford Sierra.
Compare all specifications:
| 1991 Ford Sierra | 2006 Opel Signum | |
| Make | Ford | Opel |
| Model | Sierra | Signum |
| Year Released | 1991 | 2006 |
| Engine Position | Front | Front |
| Engine Size | 1751 cc | 2198 cc |
| Engine Cylinders | 4 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 75 HP | 153 HP |
| Engine RPM | 4500 RPM | 5600 RPM |
| Torque | 152 Nm | 220 Nm |
| Torque RPM | 2200 RPM | 3800 RPM |
| Engine Bore Size | 82.5 mm | 86 mm |
| Engine Stroke Size | 82 mm | 94.6 mm |
| Engine Compression Ratio | 21.5:1 | 12.0:1 |
| Fuel Type | Diesel | Gasoline - Premium |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Weight | 1145 kg | 1535 kg |
| Vehicle Length | 4430 mm | 4640 mm |
| Vehicle Width | 1700 mm | 1800 mm |
| Vehicle Height | 1370 mm | 1470 mm |
| Wheelbase Size | 2620 mm | 2840 mm |
| Fuel Tank Capacity | 60 L | 60 L |
