Clocks are speedos and rev counters
Clock (as in clocking someone/something) is seeing someone/something
As mentioned before, miles are miles however, we have had to adopt a lot of metric measurements so, apart from road distances, almost everything else is in metres etc. That said loads of people still use the imperial measurements when talking about things like wood.sizes. 4 by 2 as apposed to 100 by 50.
We use Litres for everything liquid (although I think that it is a measurement of volume) but most people still convert it to Gallons (about 4.6 L to a gallon). Our Gallons were always a different measurement to yours even though we called them the same.
Lots of different names for the same thing depending on what part of the country you are from.
A roll (as in a small, round bread thing) can be a; roll; cob, balm cake; bap or something else
A person you know can be a: hen, duck, mate, chic(ken) or lots of other things.
I am from London and live in the midlands and they talk weird around here. They even call a roundabout an island. Mind you I have never seen a roundabout in the US.