1999 AC Ace vs. 1974 Citroen SM
To start off, 1999 AC Ace is newer by 25 year(s). Which means there will be less support and parts availability for 1974 Citroen SM. In addition, the cost of maintenance, including insurance, on 1974 Citroen SM would be higher. At 3,506 cc (8 cylinders), 1999 AC Ace is equipped with a bigger engine. In terms of performance, 1999 AC Ace (351 HP @ 6500 RPM) has 181 more horse power than 1974 Citroen SM. (170 HP @ 5500 RPM). In normal driving conditions, 1999 AC Ace should accelerate faster than 1974 Citroen SM. With that said, vehicle weight also plays an important factor in acceleration. 1974 Citroen SM weights approximately 425 kg more than 1999 AC Ace.
Because 1999 AC Ace is rear wheel drive (RWD), it offers better handling in dry conditions; in addition, if you are looking to drift, it will be much easier to do with 1999 AC Ace. However, in wet, icy, snow, or gravel driving conditions, 1974 Citroen SM, being front wheel drive (FWD), will offer much better control with better grip. 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, 1999 AC Ace (400 Nm @ 4000 RPM) has 163 more torque (in Nm) than 1974 Citroen SM. (237 Nm @ 4000 RPM). This means 1999 AC Ace will have an easier job in driving up hills or pulling heavy equipment than 1974 Citroen SM.
Compare all specifications:
1999 AC Ace | 1974 Citroen SM | |
Make | AC | Citroen |
Model | Ace | SM |
Year Released | 1999 | 1974 |
Body Type | Roadster | Coupe |
Engine Position | Front | Front |
Engine Size | 3506 cc | 2670 cc |
Engine Cylinders | 8 cylinders | 6 cylinders |
Engine Type | V | V |
Horse Power | 351 HP | 170 HP |
Engine RPM | 6500 RPM | 5500 RPM |
Torque | 400 Nm | 237 Nm |
Torque RPM | 4000 RPM | 4000 RPM |
Engine Bore Size | 83 mm | 87.1 mm |
Engine Stroke Size | 81 mm | 75 mm |
Engine Compression Ratio | 8.0:1 | 9.0:1 |
Drive Type | Rear | Front |
Number of Seats | 2 seats | 2 seats |
Number of Doors | 2 doors | 2 doors |
Vehicle Weight | 1025 kg | 1450 kg |
Vehicle Length | 4430 mm | 4900 mm |
Vehicle Width | 1880 mm | 1850 mm |
Vehicle Height | 1310 mm | 1330 mm |
Wheelbase Size | 2480 mm | 2960 mm |
Fuel Tank Capacity | 90 L | 25 L |