Hi guys.
Being a bit of a car fanatic, I have to weigh in on this. All of the respondents are wrong about what this car is.
It is in fact a GM B-Body car from circa 77-85. Appropriately enough, it is an Oldsmobile Delta 88!
Please note, front & rear overhangs, wheelbase (too long to be Malibu), and shape of the side-glass..
Wheelbase 116.0 in (2946 mm)
Length 217.5 in (5525 mm) (1977-79)
218.1 in (5540 mm) (1980-85)
Width 76.8 in (1951 mm)
Height 55.0 in (1397 mm) (coupe)
55.7 in (1415 mm) (sedan)
Check out Wikipedia for more info:
http://en.wikipedia.org/wiki/Oldsmobile_88
I hope this is of help in determining the scale of the Senior Peg RCS Model.