1991 Ford Sierra vs. 2012 Opel Astra
To start off, 2012 Opel Astra is newer by 21 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 1,998 cc (4 cylinders), 2012 Opel Astra is equipped with a bigger engine. In terms of performance, 2012 Opel Astra (197 HP @ 5400 RPM) has 122 more horse power than 1991 Ford Sierra. (75 HP @ 4500 RPM) In normal driving conditions, 2012 Opel Astra should accelerate faster than 1991 Ford Sierra. With that said, vehicle weight also plays an important factor in acceleration. 2012 Opel Astra weights approximately 480 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, 2012 Opel Astra (262 Nm @ 1950 RPM) has 110 more torque (in Nm) than 1991 Ford Sierra. (152 Nm @ 2200 RPM). This means 2012 Opel Astra will have an easier job in driving up hills or pulling heavy equipment than 1991 Ford Sierra.
Compare all specifications:
| 1991 Ford Sierra | 2012 Opel Astra | |
| Make | Ford | Opel |
| Model | Sierra | Astra |
| Year Released | 1991 | 2012 |
| Engine Position | Front | Front |
| Engine Size | 1751 cc | 1998 cc |
| Engine Cylinders | 4 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 75 HP | 197 HP |
| Engine RPM | 4500 RPM | 5400 RPM |
| Torque | 152 Nm | 262 Nm |
| Torque RPM | 2200 RPM | 1950 RPM |
| Engine Compression Ratio | 21.5:1 | 8.8:1 |
| Fuel Type | Diesel | Gasoline |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1145 kg | 1625 kg |
| Vehicle Length | 4430 mm | 4300 mm |
| Vehicle Width | 1700 mm | 1760 mm |
| Vehicle Height | 1370 mm | 1440 mm |
| Wheelbase Size | 2620 mm | 2620 mm |
| Fuel Tank Capacity | 60 L | 52 L |
