technically, it was not intended for Group B rally. it was designed (engine wise) for Group S rally (ie. 1.2L engine with no power restrictions). Group B was 2.0L class engines, btw.
3 existed in total. 1 was FWD and was horribly crashed during initial testing in Japan. 2 exist currently. 1 in Japan (white) and 1 in Germany (black). both are Mid-Engine and AWD.
it has been commented that, other than SOME body panels, there the Group S Mr2 shares nothing in common with the road going version of the wonderful AW11.
there is a yearly festival in England called the 'Goodwood Festival of Speed' and the black Group S Mr2 has run there recently.
to say the least, i'm a bit obsessed with that car.
and despite the fact that the Group S Mr2 was intended for the 1.2L class, they used the 2.0L engine (*cough*503e*cough*) which can STILL be purchased from Toysport.com - it comes in 3 basic power levels. 600hp (endurance racing), 800hp (hardcore racing) and 1000hp (all out power).
bear in mind, this is technology from 1984 era and its ONLY 2.0L, 16 valves and 1 turbo. to this day, every manufacturer that has attempted to compete with the specs and output of the 503e has failed miserably.
for the detail junkies, the 3SGTE is the 'dumbed down' version of the 503e. to this day, it is STILL very difficult to attain the same power levels of the 503e, while keeping reliability in mind.