Porsche is actually an engineering firm, that went into making cars as a sideline. The concept was the company should be run by engineers not by businessmen who were doing what was necessary to increase profits to please the shareholders. As far as l know they have never tried to build a large factory that would crank out thousands of cars, that would have a price low enough to compete with the really popular cars in the market place. l Think the bodies are made by Karmann coachwork and many of the other parts are bought from Volkswagen and various other suppliers.If someone has enough money they hire Porsche to design a car for them. John DeLorean was about to hire Porsche to design his car, butthey refused to do the job within the period of time in which he needed the car to be designed. Many other companies have their cars designed by porsche, but this is kept secret. The engineers who worked for volkswagen may have improved on Ferdinand Porches original design, but they failed

No, the Volkswagen designers design Volkswagen cars.

You can see that the two car makes are very different in designs.

:)

Porsche owns 30.9% of vw but nowadays everthing is based on the platforms the veh is using ie ford 500 lincoln zepher or the milan & mkz or the ranger & b2300 If it makes it better & cheaper they will use it porsche has used vw components for years see below u will see that porsche uses parts from alot of places ie audi & then there is the bosche systems in the cars it may be the same one as one modified to fit the specs for a totally different brand ie traction control systems abs etc

Porsche only designs porsche cars. The toureg shares the same platform with the cayenne, but porsche didnt design the toureg. Why would they design a competitors car? It just doesnt make sense.

Porsche was a design firm at one point in time (the 20s), but they havent done another companies design work since.

Porsche recently bought about 30% of VW, but previously didnt own any of them. Many people think porsche owns VW, but they dont.

Porsche does design work for many companies but most r non disclosure because these other companies do not want it known they have Porsche engineers behind their cars. A company that did advertise that they actually worked w/ Porsche on their designs r Harley Davidson for the V-Rod engine. Most of this outside work is done in Weissach. It is a Porsche testing/engineering facility.

Also, the coachwork for early Porsches was done by Reutter Carosserie. They r still around today but they only concentrate on making racing seats & airline seats. Their known by the name RECARO.

If u go back to the time before the car company existed, there was a consulting firm owned by Porsche that did engineering projects for car companies, governments, etc. After WW2, when the Porsche car company was founded, the former consulting business more of less stopped (though it would resume in other ways years later). As Porsche became a mature company, they often maintained a much larger engineering department than would be normal for the size of their company (however, with recent cutbacks in the last 5 years or so, this is probably no longer true). The large engineering staff allowed them to pursue many production based projects, as well as race projects. To justify the large staff at non-peak times, they would do outside engineering for most all companies (Harley Davidson is probably most notable, which is why they classic Harley has such a similar looking piston/cylinder & similar engine note to the Porsche; large parts of the BMW X5. etc).

Porsche have almost certianly done work for VW, though most like more in line with the design of a door handle, & airbox, etc. Not something in the area of a whole car. They were contracted to design a sports car for Audi in the early 70s, & they did. though Audi would later decide they did not want the completed car (which Porsche then marketed as the Porsche 924).

In the early days, like many European manufacturers, Porsche outsourced their coach making to other companies like Recaro & Karmann. however, this ended when Porsche purchased Recaro is Coachwork business (and Recaro retained only their seat making business for themselves). In fact, Porsche would at times take a similar approach to their production creating plants that exceeded their capacity needs & producting cars for some other German makes when it was not in use for Porsche vehicles (mainly happened in the 1990s when Porsche cars were not selling at expected levels). To be clear, since Porsche purchased Recaro, they have operated their own factory & built their own coachwork (and they do have a few large factories).

As for DeLorean. Porsche was indeed the first company contacted in regards to building his car. A set of specs were submitted, & Porscche responded that it could be done, but the price they quoted to do so in the planned time frame left John DeLorean with sticker shock as it was about 10 times greater than the planned budget. DeLorean then moved to Lotus, which accepted the project. Shortly after starting the project, the specs were dramatically scaled back to meet the budget & schedule. Porsche did not refuse this project, rather DeLorean refused to pay the amount required to contract Porsche to do this work.

Porsche designed 1 or 2 cars for VW in the 60 is and 70's. All other VW is are designed by VW. Porsche and VW share some engine parts and chassis designs.

That is a hard question to answer, Because the car companies usually do not say their cars were designed by another company, even though it happens. The Volkswagen beetle was designed by Ferdinand porsche, and the air cooled volkswagens made afterward are clearly derivitive of the beetle. The new breed of VW , Dasher, Rabbit etc. were copies of Audis, but was audi designed by Porsche? l think it may have been.