I'm afraid your favourite statistic is either extremely selective, or complete rubbish. I once owned a 1969 Mustang 351 GT. In many ways it was a terrible car, but slow it wasn't (in a straight line). The only remaining auditable performance statistic I have from it is a record of it doing a 12.95 sec standing 1/4 mile at santa pod in about 1974. It would have been less with an LSD.
I suspect your 180 might just be a little slower, but much more economical (and 39 years newer).