1971 Austin 3 vs. 1991 Ford Sierra
To start off, 1991 Ford Sierra is newer by 20 year(s). Which means there will be less support and parts availability for 1971 Austin 3. In addition, the cost of maintenance, including insurance, on 1971 Austin 3 would be higher. At 2,910 cc (6 cylinders), 1971 Austin 3 is equipped with a bigger engine. In terms of performance, 1971 Austin 3 (123 HP @ 4500 RPM) has 48 more horse power than 1991 Ford Sierra. (75 HP @ 4500 RPM). In normal driving conditions, 1971 Austin 3 should accelerate faster than 1991 Ford Sierra. With that said, vehicle weight also plays an important factor in acceleration. 1971 Austin 3 weights approximately 345 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, 1971 Austin 3 (218 Nm @ 3000 RPM) has 66 more torque (in Nm) than 1991 Ford Sierra. (152 Nm @ 2200 RPM). This means 1971 Austin 3 will have an easier job in driving up hills or pulling heavy equipment than 1991 Ford Sierra.
Compare all specifications:
| 1971 Austin 3 | 1991 Ford Sierra | |
| Make | Austin | Ford |
| Model | 3 | Sierra |
| Year Released | 1971 | 1991 |
| Engine Position | Front | Front |
| Engine Size | 2910 cc | 1751 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 123 HP | 75 HP |
| Engine RPM | 4500 RPM | 4500 RPM |
| Torque | 218 Nm | 152 Nm |
| Torque RPM | 3000 RPM | 2200 RPM |
| Engine Bore Size | 83.4 mm | 82.5 mm |
| Engine Stroke Size | 88.9 mm | 82 mm |
| Engine Compression Ratio | 9.0:1 | 21.5:1 |
| Fuel Type | Gasoline | Diesel |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1490 kg | 1145 kg |
| Vehicle Length | 4720 mm | 4430 mm |
| Vehicle Width | 1700 mm | 1700 mm |
| Vehicle Height | 1450 mm | 1370 mm |
| Wheelbase Size | 2940 mm | 2620 mm |
| Fuel Tank Capacity | 65 L | 60 L |
