Any indication on what track it was? Or did they just put some cones out on an airfield?
It's the MIRA Dry Handling Circuit. From memory, Evo claimed they were going to take all the cars they tested there, do the same tests, same drivers etc. and come up with a figure - the Evo Performance Rating. Shortly afterwards, they stopped. Just like recently when they said they would Rolling Road all cars too, IIRC.
Anyway, EPRs were
Williams 64.8
106 66.4
172 67.2
For what it's worth.
I can't scan or even take a pic of the mag (lost my mobile) so best I can do is try to describe the track...
Turn 1 is long RH but tightens onto
Main straight, which has what looks like an exact copy of the Casio chicane at Suzuka,
Turn 2 90 right
short slightly bent straight
Turn 3 long open 90 right
Straight with a copy of the old Bus Stop at Spa.
Can't be that long (a mile?) looking at the lap times. At a guess most of the lap barring the chicanes would be third/fourth gear.