1971 Citroen SM vs. 1999 GMC Sierra

To start off, 1999 GMC Sierra is newer by 28 year(s). Which means there will be less support and parts availability for 1971 Citroen SM. In addition, the cost of maintenance, including insurance, on 1971 Citroen SM would be higher. At 5,325 cc (8 cylinders), 1999 GMC Sierra is equipped with a bigger engine. In terms of performance, 1999 GMC Sierra (282 HP @ 5200 RPM) has 124 more horse power than 1971 Citroen SM. (158 HP @ 5500 RPM) In normal driving conditions, 1999 GMC Sierra should accelerate faster than 1971 Citroen SM. With that said, vehicle weight also plays an important factor in acceleration. 1999 GMC Sierra weights approximately 385 kg more than 1971 Citroen SM. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.

Because 1999 GMC Sierra is four wheel drive (4WD), it will have significant more traction and grip than 1971 Citroen SM. In wet, icy, snow, or gravel driving conditions, 1999 GMC Sierra 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, 1999 GMC Sierra (440 Nm @ 4000 RPM) has 205 more torque (in Nm) than 1971 Citroen SM. (235 Nm @ 4000 RPM). This means 1999 GMC Sierra will have an easier job in driving up hills or pulling heavy equipment than 1971 Citroen SM.

Compare all specifications: