Classic vs modern Mustang???
Hands down!!!!!! 1969 mustangs had more room inside than the newer ones!!!! Not to mention leg room for the driver and rear seat passengers as well. I'm a big guy and looked at buying a 1999 Mustangand I didn't fit(6'1" 280 lb) My friend who works at Ford at the Sharonville transmission plt has a 1969 429 Mustang and not only have I sat in the rear seat but also driven it home for him when he bought it . There is no comparison between the newer ones and the older ones. p.s. 1 chance seems to have missed his 1 chance to answer your question didn't he? which was roominess for the driver ,not competion testing