high 120's /low 130;s is average for a pair fo 10's in a sealed enclosure in a hatchback. It's decent.
I'll let you guys in on a fun little fact about bass and confined spaces. The louder the sub bass in your car, the higher your hearing threshold becomes. There are thousands of cars out there hitting over 140db's and nobody is suffering ear damge from it. Why. As the car cars cabin becoms pressurized so do your ears so they can better "resist" any damage caused by excessive pressure waves.
Also the volume number on the display means little to nothing it's all in how your gains were set