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 32 more horse power than 2004 Alfa Romeo 156. (148 HP) In normal driving conditions, 1973 Citroen SM should accelerate faster than 2004 Alfa Romeo 156.
Because 2004 Alfa Romeo 156 is four wheel drive (4WD), it will have significant more traction and grip than 1973 Citroen SM. In wet, icy, snow, or gravel driving conditions, 2004 Alfa Romeo 156 will offer significantly more control. 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, 2004 Alfa Romeo 156 (300 Nm) has 67 more torque (in Nm) than 1973 Citroen SM. (233 Nm). This means 2004 Alfa Romeo 156 will have an easier job in driving up hills or pulling heavy equipment than 1973 Citroen SM.
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 | 1910 cc | 2670 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | V |
| Horse Power | 148 HP | 180 HP |
| Torque | 300 Nm | 233 Nm |
| Engine Bore Size | 82 mm | 86.9 mm |
| Engine Stroke Size | 90.4 mm | 74.9 mm |
| Engine Compression Ratio | 18.5:1 | 9.0:1 |
| Drive Type | 4WD | Front |
| Transmission Type | Manual | Manual |
| Number of Doors | 5 doors | 2 doors |
| Vehicle Width | 1750 mm | 1840 mm |
| Vehicle Height | 1460 mm | 1330 mm |
| Wheelbase Size | 2600 mm | 2960 mm |
