Wanting a nice quiet car for 5 a.m.? It'll have to be the Lexus LS400 Ser 4 then! My neighbour loves how it glides silently past! AND you can get TWO golf bags in the boot. But, it's not a Ferrari (cheaper to run, maintain, insure.......)
A little 1L ecoboost should be pretty quiet and if you were really concerned you could cut out the exhaust noise by attaching a hosepipe to the pipe and running it back inside.