My first impression of the Genesis

[Michael_S]

GrandPrix08,

Official interior dimension numbers don't tell the whole picture for interior space in a car. In particular, some cars have the seat cushion very low to the floor. In that case, a tall person or a fat person (and I happen to be both) might be sitting with their knees almost at chest height, which gets very uncomfortable very quickly.

So I don't think official numbers tell the whole picture. But they don't hurt.
Grand Prix: front head room 38.8, second row head room 36.2
front hip room 54.5, second row hip room 54.3,
front leg room 42.2, second row leg room 36.2,
front shoulder room 58.0, second row shoulder room 54.8.

Genesis: front head room 40.4, second row head room 37.7
front hip room 54.3, second row hip room 54.3,
front leg room 44.3, second row leg room 38.6,
front shoulder room 58.3, second row shoulder room 57.9

The Grand Prix may be 2.4 inches longer, but it has a total of 4.4 inches less leg room - and that's a tremendous difference - and 1.6 inches less head room in both rows, and is slightly narrower too.