Audi Quattro Gr. 4 vs Gr. B (Flames & Sound) 5-Cylinder Engine Sound HD

Audi Quattro Gr. 4 vs Gr. B (Flames & Sound) HD Group B was introduced by the FIA in 1982 as replacement for both Group 4 (modified grand touring) and Group 5 (touring prototypes) cars. Group A referred to production-derived vehicles limited in terms of power, weight, allowed technology and overall cost. The base model had to be mass-produced (5000 units/year) and had to have 4 seats. Group A was aimed at ensuring a large number of privately owned entries in races. By contrast, Group B had few restrictions