1959 AC Ace vs. 1974 Citroen SM
To start off, 1974 Citroen SM is newer by 15 year(s). Which means there will be less support and parts availability for 1959 AC Ace. In addition, the cost of maintenance, including insurance, on 1959 AC Ace would be higher. At 2,670 cc (6 cylinders), 1974 Citroen SM is equipped with a bigger engine. In terms of performance, 1974 Citroen SM (170 HP @ 5500 RPM) has 45 more horse power than 1959 AC Ace. (125 HP @ 6000 RPM) In normal driving conditions, 1974 Citroen SM should accelerate faster than 1959 AC Ace. With that said, vehicle weight also plays an important factor in acceleration. 1974 Citroen SM weights approximately 556 kg more than 1959 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, 1974 Citroen SM (237 Nm @ 4000 RPM) has 70 more torque (in Nm) than 1959 AC Ace. (167 Nm @ 4500 RPM). This means 1974 Citroen SM will have an easier job in driving up hills or pulling heavy equipment than 1959 AC Ace.
Compare all specifications:
1959 AC Ace | 1974 Citroen SM | |
Make | AC | Citroen |
Model | Ace | SM |
Year Released | 1959 | 1974 |
Body Type | Roadster | Coupe |
Engine Position | Front | Front |
Engine Size | 1971 cc | 2670 cc |
Engine Cylinders | 6 cylinders | 6 cylinders |
Engine Type | in-line | V |
Valves per Cylinder | 2 valves | 2 valves |
Horse Power | 125 HP | 170 HP |
Engine RPM | 6000 RPM | 5500 RPM |
Torque | 167 Nm | 237 Nm |
Torque RPM | 4500 RPM | 4000 RPM |
Engine Compression Ratio | 9.0:1 | 9.0:1 |
Fuel Type | Gasoline | Gasoline |
Number of Seats | 2 seats | 2 seats |
Number of Doors | 2 doors | 2 doors |
Vehicle Weight | 894 kg | 1450 kg |
Vehicle Length | 3850 mm | 4900 mm |
Vehicle Width | 1520 mm | 1850 mm |
Vehicle Height | 1250 mm | 1330 mm |
Wheelbase Size | 2290 mm | 2960 mm |
Fuel Tank Capacity | 59 L | 25 L |