You don't drive in the Eurotunnel

Not really, but it's not very different. You just drive to the train, park on the train and drive off the train when it stops. I haven't been to England for a long time but when I did I was simply calling it driving to England.

I'd still call somewhere on the continent an 'N hour drive.' The 'drive' part indicates traveling by car the entire distance (I've never been on a eurotunnel trip where we bothered getting a cabin so we were sat in the car the entire time) and in any case it's pretty clear what you meant given the absence of pure land routes.

Threads like this always make me realize that Canada's sprawl is real.

4 hour drive and you're about half way to your parent's place, and they're in the same province.

100 miles is a long way in Europe, 100 years is a long time in America.