I would say that MR2 means : " Midship Runabout - 2 seats ".
In France, where I live, MR2 are called : "MR coupé". We don't use the word "MR2"
because the french prononciation of this word,
sounds like the french word for : "shitty".
Hopefully, you only need one ride to realise there is nothing shitty in the car ;-)
Following part (History) - - U N D E R C O N S T R U C T I O N - -
1) How did it begin ?
TOP'S CARS Magazine 15th of January 1993 - N° 103
2) First magazines found :
- - - (parts to come...)