I would say Bullit with Steve McQueen is way up there it was rad and realistic. The car chase "The Rock" was also pretty cool. And that one Movie with Dinero when he was in a crew in England can't remember the name was also a very realistic not a fakey car chase.
Le Mans
Bullitt
Driven <-- Unrealistic but sweet to see 2 cart cars racing through the Ville Marie tunnel in Montreal.
Gone in 60 Seconds
Cannonball Run