Bore, stroke, displacement and compression for 5 Triumph engines across 4 families. Free reference with rod ratio and head specs where published.
| Displacement range | 70-152 ci |
|---|---|
| Cylinder counts | 4, 6 |
| Years covered | 1963-1980 |
| Families | 4 |
| Engines | 5 |
Every engine page lists bore, stroke, displacement, compression and rod ratio, with mean piston speed and bore/stroke character worked out, plus cylinder head specs where published. Each links into the calculators with its own dimensions filled in.