Menno...
I think you already answered your own question...
"My other classics love it"If your TR3A and SAAB 96 love it so will your 914...
You know I get all these answers that by me using VP-110 (MON 107/RON 113) race fuel in my old 914-6 street car it's just a waste and bla bla bla.....sure it is 2.5 times more expensive that the local "oxygenated"gasoline with alcohol, MTBE and who knows what else ..
but every time I go out and start the 45 year old car...all I have to do is press the gas pedal down 3 times to wet the carb chokes and turn the key and it starts right up....every damn time....heck even my lawn mower and 2 cycle leaf blower run better with it....
So bottom line it works for me and apparently for your vintage Triumph and SAAB
Your 914 will like you a lot more....
Have Fun driving your vintage cars!