Don't get me wrong,I think all the old bikes are super cool but to compare them to modern day in power or handling is a bit of a reach.
Anyway,two examples.The first is from this months mxa's ask the mxperts.I'm not going to type it all out as I already did and for some reason was unable to post it-likely a Maico conspiracy

Paraphrased,the guys asks where he can find a good old air cooled open bike like the maico he raced 30 years ago.Their reply-buy a modern day YZ as it has more power,etc,etc, than your old maico ever dreamed of.
Example two.A real race video of a Maico 490 ridden by Jonathan Belle.Vid lasts about 5 min.Take note of the handling of the other period bikes in the race.As for how this turns out,yes,this was largely what it was like back then as many of us lived in that era.
http://www.jonathanbelle.com/Videos/06-07_races/2007-03-24_brighton_evo-a.wmvThere,end of discussion.You're welcome