That’s correct, the Triumph V twin was a vertical or parallel twin, not a V as the V8. From Wikipedia:
“For 1959 Turner designed the hemi-head Daimler 2.5 & 4.5 litre V8 engines used in the Daimler SP250 sports car and Daimler Majestic Major respectively. The valve gear was more similar to the Chrysler Hemi than the Triumph motorcycle, itself based on Riley”
I think the confusion is caused by the V for vertical! The two cylinders are side by side on a common crankshaft. On a 360° crank both pistons rise and fall together. On a 180° crank pistons are 1 up 1 down.
Hope this helps.
