1983 Austin Allegro vs. 1971 Citroen SM
To start off, 1983 Austin Allegro is newer by 12 year(s). Which means there will be less support and parts availability for 1971 Citroen SM. In addition, the cost of maintenance, including insurance, on 1971 Citroen SM would be higher. At 2,670 cc (6 cylinders), 1971 Citroen SM is equipped with a bigger engine. In terms of performance, 1971 Citroen SM (158 HP @ 5500 RPM) has 115 more horse power than 1983 Austin Allegro. (43 HP @ 5250 RPM) In normal driving conditions, 1971 Citroen SM should accelerate faster than 1983 Austin Allegro. With that said, vehicle weight also plays an important factor in acceleration. 1971 Citroen SM weights approximately 650 kg more than 1983 Austin Allegro. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Both vehicles are front wheel drive (FWD). Which offers better traction when its slippery than rear wheel drive vehicles. With that said, do keep in mind that many other factors such as speed and the wear on your tires can also have significant impact on traction and control. Let's talk about torque, 1971 Citroen SM (235 Nm @ 4000 RPM) has 165 more torque (in Nm) than 1983 Austin Allegro. (70 Nm @ 3000 RPM). This means 1971 Citroen SM will have an easier job in driving up hills or pulling heavy equipment than 1983 Austin Allegro.
Compare all specifications:
| 1983 Austin Allegro | 1971 Citroen SM | |
| Make | Austin | Citroen |
| Model | Allegro | SM |
| Year Released | 1983 | 1971 |
| Engine Position | Front | Front |
| Engine Size | 998 cc | 2670 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | V |
| Horse Power | 43 HP | 158 HP |
| Engine RPM | 5250 RPM | 5500 RPM |
| Torque | 70 Nm | 235 Nm |
| Torque RPM | 3000 RPM | 4000 RPM |
| Engine Bore Size | 64.6 mm | 87 mm |
| Engine Stroke Size | 76.2 mm | 75 mm |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Front | Front |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 4 seats |
| Vehicle Weight | 800 kg | 1450 kg |
| Vehicle Length | 3200 mm | 4900 mm |
| Vehicle Width | 1620 mm | 1850 mm |
| Vehicle Height | 1400 mm | 1330 mm |
| Wheelbase Size | 2450 mm | 2950 mm |
