I met a guy from Vancouver that had a mid 90's Mercedes E-Class wagon. Looked bone stock except for some mildly larger wheels/tires. Under the hood was a fire-breathing AMG V-8 that only began its life as an AMG engine, but then had a supercharger added and many other go-fast goodies. The upshot is that his car went from a nice 217hp wagon to a 500hp monster that was capable of making Viper drivers wonder "why am I not pulling away?"
To add insult to injury, he added some diesel emblems.
I would love to have something similar. A pedestrain BMW or Mercedes wagon with AWD and 700hp.