Is my engine an interference motor?

They are an interference engine, so yes.

the cam belt last\s only 100kmiles. or 160k-meters
cheap belts less, even by 1/2 that
when bad is snaps or slips.
when that happen spark ends, or a the leas cam and spark are timed now way way way RETARDEDDDDD
compression 1/2 normal
and if PCM sees spark die it cuts fuel last.
modern are cam way off cut spark an fuel in the blink of any eye.
ending bent valves (hope)
"All VW engines since about 1992 are interference motors."

as seen here.

https://www.heritagepartscentre.com/us/051198119gen-cambelt-kit-for-1-5-to-1-8-engines-genuine.html

As a general rule of thumb; all 4 cylinder engines are interference and all 4 cylinder engines use belts. If it had a chain it would be a 6 cylinder and it would not matter.

It depends on whether or not you have an interference engine? Some non-interference engines are called free-wheeling and won't hurt the valves if belt breaks. I don't know your year--make--model? My database only covers vehicles sold in the US.

Is this the 2 litre engine and is it the twin cam engine?
The TWIN cam IS an interference engine but the SINGLE cam engine is NOT.

No it is not an interference engine.....However .Most European engines are..Some are and some are not in most small engine cars/trucks of all makes...All it really means is the timing of the engine is different than others to improve performance....However if your timing belt snaps with an interference engine it can cause more damage because of the odd timing they have...So ...No ...Your engine is Non interference..

Most Ford vehicles from 1985 and up have enough valve clearence so the valves do not get hit when the timing belt snaps. Since I worked for ford for many years I have only seen one with valve damage and the youg man said he was driving his car really hard at high RPM's. I believe you will be okay on your engine as long as when the belt broke the engine was not at high rpm's. If know one has told you those engine recommend a timing belt replacement every 60k. I hpe this helped and I hope this fixes your problem. Good luck, Roger

what do you mean the gears no keyway ,tapered interference fit

did you continue to crank it to start ?
did you hear anything other than usual starter noise ?

you may have gotten lucky if no clanking or clicking noise ---don't try to start it again though

and that is timing belt not camshaft

for future knowledge when considering a vehicle for purchase ---ASK or find out if it's what's called an interference motor or the non interference design ---if you snap the belt on an interference design
alot of twin cams are --but I see a trend from automakers to get away from this --which they should
then albeit some or even major damage can occur ---the 91's civics 1,6 Single over head cam is a non interfernce design --now 1989 or 1992 on well that's another matter
I love my wifes 1991 civic dx ---to date only things ever to fail was the distributor and the timing belt and tensioner ---ps --think about replacing the water pump --front crankshaft seal as well while
you are in there replacing the timing belt ---do a coolant leak down test too --= 5 minutes
to check intake gaskets etc and head gasket --opportune time for a replacement
Yoy can buy the entire engine gasket set generally cheaper that a few individual one and keep
the others for future or give them to a new owner Someday --good 1 st cars --they are capable of 250,000 + easy ---key to longevity ---add an oil cooler with cooling fan set at the right temp with
fan --even better if you live in the mtns like I do
HAWK

well if u got a tow start i cant see it runining\
as none of the cams were turning
it might have jumped a bit
and it wont wreck your engine it will have to be retimed with the belt and the gear casing off\\\

and a camry engine will fit depending on the year of the engine