One of the English/American differences I love is automotive:
choke = strangler

Here's some more:
truck = lorry
bus = jitney
county dump = council tip
gasoline = petrol
kerosene = gasoline Is that right?
freeway = motorway

And then there's 'knock up' which in London, simply means to call on, but in the US means 'make pregnant'.

I once produced a number of red faced relatives at a family sunday dinner. I was 13 and a US citizen, my relies were all Canadian, and I simply announced as I ducked under the table that I'd dropped my napkin.

Mom took me aside and explained it later.
Barbara