The Matra-Simca MS 670 was a Prototype race car that won the 24 Hours of LeMans 3 times in a row from 1972 to 1974. In addition, it won the World Manufacturer's Championship twice in 1973 and 1974.
The Matra-Simca MS 670 was designed by Bernard Boyer and Jean-Louis Caussin. The long tail version, designed for the 1974 24 Hour of LeMans, was still called "670 B". The "B" designation was assigned to Matras that were fitted with the 5-speed Porsche gearbox.
The Mantra-Simca's chassis was an aluminum monocoque while the body was aluminum. The engine was a 3-litres V12 at 60 degrees with an aluminum block and head - bore was 79.7mm and stroke was 50.0mm. The engine was extremely loud.
The version used in the 1974 24 Hours of LeMans was the "MS 73" - the engine developed 450 HP at 10,500 RPM and 320 Nm of torque at 8,400 RPM. Top speed was over 320 kph on the famous Mulsanne straight.
Brakes had Girling ventilated discs on all 4 corners - in 1974, the rear brakes were moved inboard. Wheel dimensions were 13"x11" for the front and "15" x 15" at the rear.
There were three (3) Matra-Simca MS 670B's racing at the 1974 24 Hours of LeMans. The number 8 car was driven by Jean-Pierre Jaussaud, Bob Wollek, and Jose Dolhem.