1986 AC Ace vs. 1973 Citroen SM
To start off, 1986 AC Ace is newer by 13 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 2,792 cc (6 cylinders), 1986 AC Ace is equipped with a bigger engine. In terms of performance, 1973 Citroen SM (180 HP) has 30 more horse power than 1986 AC Ace. (150 HP) In normal driving conditions, 1973 Citroen SM should accelerate faster than 1986 AC Ace.
Because 1986 AC Ace 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, 1986 AC Ace 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, 1973 Citroen SM (233 Nm) has 19 more torque (in Nm) than 1986 AC Ace. (214 Nm). This means 1973 Citroen SM will have an easier job in driving up hills or pulling heavy equipment than 1986 AC Ace.
Compare all specifications:
| 1986 AC Ace | 1973 Citroen SM | |
| Make | AC | Citroen |
| Model | Ace | SM |
| Year Released | 1986 | 1973 |
| Body Type | Roadster | Coupe |
| Engine Position | Front | Front |
| Engine Size | 2792 cc | 2670 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | V | V |
| Horse Power | 150 HP | 180 HP |
| Torque | 214 Nm | 233 Nm |
| Engine Bore Size | 93.1 mm | 86.9 mm |
| Engine Stroke Size | 68.5 mm | 74.9 mm |
| Engine Compression Ratio | 9.2:1 | 9.0:1 |
| Drive Type | 4WD | Front |
| Transmission Type | Manual | Manual |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Length | 3970 mm | 4920 mm |
| Vehicle Width | 1820 mm | 1840 mm |
| Vehicle Height | 1170 mm | 1330 mm |
| Wheelbase Size | 2480 mm | 2960 mm |
