I do not know that it happens often but there have been reports of Amphi fires from things like oil cooler leaks.
I came across a product called BlazeCut that might be of interest for Amphi or other older vehicles. The USA distributor is:
http://jogrusa.com/products/blazecut-fire-suppression-system.
Here is a video on youtube with it in use https://m.youtube.com/watch?v=Kswau1mGBE8
It might save you from total loss of your prized vehicle.
I came across a product called BlazeCut that might be of interest for Amphi or other older vehicles. The USA distributor is:
http://jogrusa.com/products/blazecut-fire-suppression-system.
Here is a video on youtube with it in use https://m.youtube.com/watch?v=Kswau1mGBE8
It might save you from total loss of your prized vehicle.