Mine get's loud at 4-5k rpm, once cruising, it quiets down. Same in the city, acceleration is kinda loud.
I think it's the lack of in-cabin sound dampening, for instance, I can hear a loud whoosh everytime the AC compressor goes on, where as in the rogue, it's silent. Also, if it's a CVT, it might run quieter or louder, depends on your foot. CVT whines a little, where as 4spd autos and 6 speed manuals have a distinct gear revs and shifts.