SAC#216 : 1951 MG TD Sportcabriolet by Wendler

[Facel]

I don't wanna be cocky but my source (a book about Wendler off Ralf Kieselbach) said it is 1952.
There was another MG roadster which was made in 1951.

[sixtee5cuda]

This is probably the original of the puzzle picture.  Not sure where it originally appeared, and this is the only such image I found online.

[Carnut]

Another picture:

[grobmotorix]

An ad for the same car?

[Wendax]

Yes