2007 Audi A4 vs. 1974 Citroen SM
To start off, 2007 Audi A4 is newer by 33 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 3,123 cc (6 cylinders), 2007 Audi A4 is equipped with a bigger engine. In terms of performance, 2007 Audi A4 (252 HP @ 6500 RPM) has 82 more horse power than 1974 Citroen SM. (170 HP @ 5500 RPM). In normal driving conditions, 2007 Audi A4 should accelerate faster than 1974 Citroen SM. With that said, vehicle weight also plays an important factor in acceleration. 2007 Audi A4 weights approximately 140 kg more than 1974 Citroen SM. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2007 Audi A4 is four wheel drive (4WD), it will have significant more traction and grip than 1974 Citroen SM. In wet, icy, snow, or gravel driving conditions, 2007 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, 2007 Audi A4 (330 Nm @ 3250 RPM) has 93 more torque (in Nm) than 1974 Citroen SM. (237 Nm @ 4000 RPM). This means 2007 Audi A4 will have an easier job in driving up hills or pulling heavy equipment than 1974 Citroen SM.
Compare all specifications:
| 2007 Audi A4 | 1974 Citroen SM | |
| Make | Audi | Citroen |
| Model | A4 | SM |
| Year Released | 2007 | 1974 |
| Body Type | Station Wagon | 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 | 170 HP |
| Engine RPM | 6500 RPM | 5500 RPM |
| Torque | 330 Nm | 237 Nm |
| Torque RPM | 3250 RPM | 4000 RPM |
| Engine Bore Size | 84.5 mm | 87.1 mm |
| Engine Stroke Size | 92.8 mm | 75 mm |
| Engine Compression Ratio | 12.5:1 | 9.0:1 |
| Fuel Type | Gasoline - Premium | Gasoline |
| Drive Type | 4WD | Front |
| Number of Seats | 5 seats | 2 seats |
| Number of Doors | 5 doors | 2 doors |
| Vehicle Weight | 1590 kg | 1450 kg |
| Vehicle Length | 4590 mm | 4900 mm |
| Vehicle Width | 1780 mm | 1850 mm |
| Vehicle Height | 1430 mm | 1330 mm |
| Wheelbase Size | 2650 mm | 2960 mm |
| Fuel Tank Capacity | 70 L | 25 L |
