2009 Audi A4 vs. 1972 Citroen SM
To start off, 2009 Audi A4 is newer by 37 year(s). Which means there will be less support and parts availability for 1972 Citroen SM. In addition, the cost of maintenance, including insurance, on 1972 Citroen SM would be higher. At 3,123 cc (6 cylinders), 2009 Audi A4 is equipped with a bigger engine. In terms of performance, 2009 Audi A4 (252 HP @ 5100 RPM) has 94 more horse power than 1972 Citroen SM. (158 HP @ 5500 RPM). In normal driving conditions, 2009 Audi A4 should accelerate faster than 1972 Citroen SM. With that said, vehicle weight also plays an important factor in acceleration. 1972 Citroen SM weights approximately 522 kg more than 2009 Audi A4.
Because 2009 Audi A4 is four wheel drive (4WD), it will have significant more traction and grip than 1972 Citroen SM. In wet, icy, snow, or gravel driving conditions, 2009 Audi A4 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, 2009 Audi A4 (331 Nm @ 3250 RPM) has 96 more torque (in Nm) than 1972 Citroen SM. (235 Nm @ 4000 RPM). This means 2009 Audi A4 will have an easier job in driving up hills or pulling heavy equipment than 1972 Citroen SM. 2009 Audi A4 has automatic transmission and 1972 Citroen SM has manual transmission. 1972 Citroen SM will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2009 Audi A4 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2009 Audi A4 | 1972 Citroen SM | |
| Make | Audi | Citroen |
| Model | A4 | SM |
| Year Released | 2009 | 1972 |
| Body Type | Convertible | Coupe |
| Engine Position | Front | Front |
| Engine Size | 3123 cc | 2670 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 2 valves |
| Horse Power | 252 HP | 158 HP |
| Engine RPM | 5100 RPM | 5500 RPM |
| Torque | 331 Nm | 235 Nm |
| Torque RPM | 3250 RPM | 4000 RPM |
| Engine Bore Size | 84.5 mm | 87 mm |
| Engine Stroke Size | 92.8 mm | 75 mm |
| Fuel Type | Gasoline - Premium | Gasoline |
| Drive Type | 4WD | Front |
| Transmission Type | Automatic | Manual |
| Number of Seats | 4 seats | 4 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 930 kg | 1452 kg |
| Vehicle Length | 4580 mm | 4900 mm |
| Vehicle Width | 1400 mm | 1850 mm |
| Vehicle Height | 1780 mm | 1330 mm |
| Wheelbase Size | 2660 mm | 2950 mm |
| Fuel Tank Capacity | 70 L | 89 L |
