2004 Alfa Romeo 156 vs. 1973 Citroen SM
To start off, 2004 Alfa Romeo 156 is newer by 31 year(s). Which means there will be less support and parts availability for 1973 Citroen SM. In addition, the cost of maintenance, including insurance, on 1973 Citroen SM would be higher. At 2,670 cc (6 cylinders), 1973 Citroen SM is equipped with a bigger engine. In terms of performance, 1973 Citroen SM (180 HP) has 42 more horse power than 2004 Alfa Romeo 156. (138 HP) In normal driving conditions, 1973 Citroen SM should accelerate faster than 2004 Alfa Romeo 156.
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, 1973 Citroen SM (233 Nm) has 70 more torque (in Nm) than 2004 Alfa Romeo 156. (163 Nm). This means 1973 Citroen SM will have an easier job in driving up hills or pulling heavy equipment than 2004 Alfa Romeo 156.
Compare all specifications:
| 2004 Alfa Romeo 156 | 1973 Citroen SM | |
| Make | Alfa Romeo | Citroen |
| Model | 156 | SM |
| Year Released | 2004 | 1973 |
| Body Type | Station Wagon | Coupe |
| Engine Position | Front | Front |
| Engine Size | 1747 cc | 2670 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | V |
| Horse Power | 138 HP | 180 HP |
| Torque | 163 Nm | 233 Nm |
| Engine Bore Size | 82.1 mm | 86.9 mm |
| Engine Stroke Size | 82.7 mm | 74.9 mm |
| Engine Compression Ratio | 10.3:1 | 9.0:1 |
| Drive Type | Front | Front |
| Transmission Type | Manual | Manual |
| Number of Doors | 5 doors | 2 doors |
| Vehicle Length | 4450 mm | 4920 mm |
| Vehicle Width | 1750 mm | 1840 mm |
| Vehicle Height | 1400 mm | 1330 mm |
| Wheelbase Size | 2600 mm | 2960 mm |
