1956 AC Ace vs. 1989 Citroen XM
To start off, 1989 Citroen XM is newer by 33 year(s). Which means there will be less support and parts availability for 1956 AC Ace. In addition, the cost of maintenance, including insurance, on 1956 AC Ace would be higher. At 2,975 cc (6 cylinders), 1989 Citroen XM is equipped with a bigger engine. In terms of performance, 1989 Citroen XM (170 HP @ 5600 RPM) has 47 more horse power than 1956 AC Ace. (123 HP @ 6000 RPM) In normal driving conditions, 1989 Citroen XM should accelerate faster than 1956 AC Ace. With that said, vehicle weight also plays an important factor in acceleration. 1989 Citroen XM weights approximately 610 kg more than 1956 AC Ace. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Let's talk about torque, 1989 Citroen XM (240 Nm) has 73 more torque (in Nm) than 1956 AC Ace. (167 Nm). This means 1989 Citroen XM will have an easier job in driving up hills or pulling heavy equipment than 1956 AC Ace.
Compare all specifications:
| 1956 AC Ace | 1989 Citroen XM | |
| Make | AC | Citroen |
| Model | Ace | XM |
| Year Released | 1956 | 1989 |
| Engine Position | Front | Front |
| Engine Size | 1971 cc | 2975 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | V |
| Horse Power | 123 HP | 170 HP |
| Engine RPM | 6000 RPM | 5600 RPM |
| Torque | 167 Nm | 240 Nm |
| Engine Bore Size | 66 mm | 93 mm |
| Engine Stroke Size | 96 mm | 73 mm |
| Transmission Type | Manual | Manual |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Weight | 894 kg | 1504 kg |
| Vehicle Length | 3850 mm | 4960 mm |
| Vehicle Width | 1520 mm | 1800 mm |
| Vehicle Height | 1250 mm | 1400 mm |
| Wheelbase Size | 2290 mm | 2860 mm |
