and there are not to many differances
Its easy enough to understand each other , but there are a lot of differences....
USA... trunk......UK....car boot
USA.....hood.....UK....bonnet
USA....fender......UK.....bumper
USA....windshield.....UK....windscreen....
USA....sidewalk.....UK....pavement.....
USA.....elevator.....UK....lift.....
The list is endless.....like you i don,t have a problem , as i have lived in the USA......and most Brits are familiar with the USA language as we see so many American films in the UK....