What is relatinship between porsche an VW?
 

The relationship is, in short, a complex soap opera.

The love version: Ferdinand Porsche was an automotive engineer that worked for a few companies, and eventually founded his own design business. Working on contract for the German Government he designed the Volkswagon Beetle. Following WW2, British interests would take control of the former VW factory and begin producing Beetles. Ferdinand's son Ferry would found the Porsche automobile company (because ford vcm 2 Ferdinand was imprisoned at the end of WW2 and would also be prohibited from owning an industrial company due to his prior work for the German Government).

Ferry would design a sports car, but the lack of available parts in post-war Germany would make it impossible to produce this car. However, at the same time, settlement between the British Government, new German Government, and Ferdinand Porsche would come about in regards to the British having violated Ferdinand Porsche's copyrights and patents relating to the Beetle... this would give Porsche ownership of VW distribution in parts of Europe and access to free parts. With this new supply of parts, Ferry's designs were now aimed at using VW parts in a new design: the 356.

This would continue, with Ferry's son Ferdinand, and his sister Louise's son Ferdinand Piëch becoming the key players in the saga as things moved into the 1960s. Ferdinand Alexander Porsche would bring about the 911, and Ferdinand Piëch would transform the motorsports division of the company into overall winners at Le Mans. Porsche would leverage it's ownership of part of VW's supply chain into partnerships for distribution of it's cars throughout the world. These close ties between the two companies would lead to joint ventures like the Porsche-VW 914/Porsche 914-6... and the Porsche 924 (which was designed for Audi, but then sold as a Porsche after Audi decided against putting the car into production).

Issues of money and love which would be worthy of a seedy series would eventually Piwis Tester II drive a wedge between the two sides of the family, with Ferdinand Piëch leaving Porsche to take a similar job at Audi (eventually becoming chairman at Audi, and then moving up to running VW). While corporate relations between the two would remain stable, all reports would indicate that both the Piëch and Porsche sides of the family would struggle to exert more control than the other over Porsche (all voting shares of Porsche were controlled by these two sides of the Porsche family).