With a roofrack, tacky plastic cladding and lifted, softer suspension I could see an "Outlander" edition Pessima.
Ok pretty big update, I got permission from the creator of the first pessima wagon to use some of his mesh in my mod I have got it in game and now working on jbeam I will add pics in a bit
Maybe have some sort of turbo i4 making 150-175 horses and the normal Pessima v6 with an optional supercharger and/or cold air intake? that's what i've got.
For custom engines you should talk with Rez:ia who made the Kashira and made some engines that make sense for this car. The 3.5 engine in the top trim Kashira would work great here