1991 Ford Sierra vs. 1973 Monteverdi Hai 450
To start off, 1991 Ford Sierra is newer by 18 year(s). Which means there will be less support and parts availability for 1973 Monteverdi Hai 450. In addition, the cost of maintenance, including insurance, on 1973 Monteverdi Hai 450 would be higher. At 6,974 cc (8 cylinders), 1973 Monteverdi Hai 450 is equipped with a bigger engine. In terms of performance, 1973 Monteverdi Hai 450 (444 HP @ 5000 RPM) has 369 more horse power than 1991 Ford Sierra. (75 HP @ 4500 RPM) In normal driving conditions, 1973 Monteverdi Hai 450 should accelerate faster than 1991 Ford Sierra. With that said, vehicle weight also plays an important factor in acceleration. 1973 Monteverdi Hai 450 weights approximately 145 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, 1973 Monteverdi Hai 450 (586 Nm @ 4000 RPM) has 434 more torque (in Nm) than 1991 Ford Sierra. (152 Nm @ 2200 RPM). This means 1973 Monteverdi Hai 450 will have an easier job in driving up hills or pulling heavy equipment than 1991 Ford Sierra.
Compare all specifications:
| 1991 Ford Sierra | 1973 Monteverdi Hai 450 | |
| Make | Ford | Monteverdi |
| Model | Sierra | Hai 450 |
| Year Released | 1991 | 1973 |
| Engine Position | Front | Middle |
| Engine Size | 1751 cc | 6974 cc |
| Engine Cylinders | 4 cylinders | 8 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 75 HP | 444 HP |
| Engine RPM | 4500 RPM | 5000 RPM |
| Torque | 152 Nm | 586 Nm |
| Torque RPM | 2200 RPM | 4000 RPM |
| Engine Bore Size | 82.5 mm | 108 mm |
| Engine Stroke Size | 82 mm | 95.2 mm |
| Engine Compression Ratio | 21.5:1 | 10.3:1 |
| Fuel Type | Diesel | Gasoline |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1145 kg | 1290 kg |
| Vehicle Length | 4430 mm | 4380 mm |
| Vehicle Width | 1700 mm | 1800 mm |
| Vehicle Height | 1370 mm | 1100 mm |
| Wheelbase Size | 2620 mm | 2520 mm |
| Fuel Tank Capacity | 60 L | 130 L |
