The
1972 Austrian GP, held at the Osterreichring circuit, saw 100,000 spectators
Champ Car: an average of 150,000 per event (latest numbers on Wiki)
NASCAR: Average 186,000 (same source)
2007 Australian Grand Prix held in Melbourne was 301,000 (same source)
WHat were early year figures for Champ ?
Hmmmm, guess my memory was rose-tinted
The brief sample of numbers I found then there's more now.
BUT, that's not reflected in comparions with MotoGP and WSB which regularly attract double the numbers of F1 events
Also, that it "seemed" busier -- thinking that's probably down to circuits being true road circuits and not lined with stadiums and seats for everyone. Squeezing in amongst the trees and on gras banks made it feel a lot busier I guess. However, I've been at SIlverstone where the infield was SOLID with specators and never seen any event even come near to squeezing that many in.
on the financial part and why small teams were able to compete .....
In 1961 a Cooper Fl chassis, from the team that had won the previous year's World Championship, sold for £4,500 with a Coventry-Climax engine costing £1,200 and it was estimated that anyone could go Fl racing for a mere £65,550 (Campbell, 1996). Translated into today's figures, if such a thing were possible, that would mean being able to buy a chassis for £55,000 and a Renault engine for £15,000 and going Fl racing for £800,000.