1985 Ford Sierra vs. 1971 Opel Kadett
To start off, 1985 Ford Sierra is newer by 14 year(s). Which means there will be less support and parts availability for 1971 Opel Kadett. In addition, the cost of maintenance, including insurance, on 1971 Opel Kadett would be higher. At 2,790 cc (6 cylinders), 1985 Ford Sierra is equipped with a bigger engine. In terms of performance, 1985 Ford Sierra (148 HP @ 5700 RPM) has 89 more horse power than 1971 Opel Kadett. (59 HP @ 5400 RPM). In normal driving conditions, 1985 Ford Sierra should accelerate faster than 1971 Opel Kadett. With that said, vehicle weight also plays an important factor in acceleration. 1985 Ford Sierra weights approximately 445 kg more than 1971 Opel Kadett. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Let's talk about torque, 1985 Ford Sierra (220 Nm @ 3800 RPM) has 132 more torque (in Nm) than 1971 Opel Kadett. (88 Nm @ 3400 RPM). This means 1985 Ford Sierra will have an easier job in driving up hills or pulling heavy equipment than 1971 Opel Kadett.
Compare all specifications:
| 1985 Ford Sierra | 1971 Opel Kadett | |
| Make | Ford | Opel |
| Model | Sierra | Kadett |
| Year Released | 1985 | 1971 |
| Engine Position | Front | Front |
| Engine Size | 2790 cc | 1196 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 148 HP | 59 HP |
| Engine RPM | 5700 RPM | 5400 RPM |
| Torque | 220 Nm | 88 Nm |
| Torque RPM | 3800 RPM | 3400 RPM |
| Engine Bore Size | 93 mm | 79 mm |
| Engine Stroke Size | 68.5 mm | 61 mm |
| Fuel Type | Gasoline | Gasoline |
| Vehicle Weight | 1205 kg | 760 kg |
| Vehicle Length | 4400 mm | 4190 mm |
| Vehicle Width | 1680 mm | 1590 mm |
| Vehicle Height | 1370 mm | 1420 mm |
| Wheelbase Size | 2620 mm | 2430 mm |
