But not "almost hald a million" Sprints, I'd wager.
From the dim, dark recesses of my memory......
I believe the correct honour for the Dolmite Sprint engine is that is/was the first 16v 4 cylinder without DOHC. I'd guess the Dolly Sprint was sohc (could it have been ohv? dont think so, but?).
There was some special valve gear to operate the 4 of them. For some reason the term 'finger gear' comes to mind.
Alfas and Fiat etc had DOHC with 2valve/cyl at the time, and Triumph had the opposite. I think Alfa went to Twin Spark before going to 16v on their venerable dohc.
Gee guys this is all memory stuff, but I think I'm around the facts if not right on them.
BTW I'd love to see Triumph come back. Could be a great niche brand if they are at least fairly affordable. Could be a product line like Pontiac and Saturn could offer with the will power to do it. Kappas, Alphas with some DeltaII's and a dash of Zeta. All with good looks and driveability. Brum brum brum instead of Zoom zoom zoom?