160km too much for a 4cyl? my 89 GTS has 350,000km... and I know more than enough cars with over 300k so obviously they don't know WTF they're talking about.
200K or so you should really look at what maintenance was given to the car and what it will need as sometimes people sell the cars at this age because they don't want to spend the money on required maintenance.
I bought my 89 GTS with 211k and basically had to put about a little bit of money due to a few things needed. T-belt had been done so that was ok, but I needed a rad, clutch at 250k and rear calipers at about 230k.